CONTROL HOME SECURITY SYSTEM LOW- FREQUENCY RADII CIR REMOTE Popular Electroilics
Bulbi A oineSecu rìtv System A commercial-quality system that includes multiple zones, auto -dialer support, adjustable entry and exit delays, and more
An Emergency Remote Control For Your Car Disable your car, flash your lights, sound your horn, and more with this easy -to -build .. security accessory
G There's a lot of to be had at the bottom
r quency spectrun
Car Naugatjon es- Nfntfeam -.- .._D _. _- - 3T-7:T _.. lfq:!lltnitdAlílldillltld!l:l.f.11.11udLll : i A look at the first 6 0_ 6: a :44 7 gri3iC: F:-E95 46 system offered by a $3.50 U.S., ROBERT D,A1-111 ESP iSr..f,y 3G-AO # V37 U.S. automaker $3.95 CAN.
GERNSBACK C.7;i'_r!
www.americanradiohistory.comAmericanRadioHistory.Com Design and Veñfy Cfrcuîts. Fast.
CM PPPPP Complement Your Test Bench Here's why Electronics Workbench belongs on your test bench: Wires route themselves. Connections are always perfect. And the Analog Module includes: simulated components and test instruments work just like the real complete control over all component values thing. The instruments are indestructible and the parts bin holds ideal and real -world models for active an unlimited supply of each component. The result: thousands of components electronics professionals and hobbyists save precious time and resistors, capacitors, inductors, transformers, money. Over 90% would recommend it to their Mends and relays, diodes, Zener diodes, LEDs, BJTs, colleagues. Electronics Workbench: the ideal, affordable tool to opamps, bulbs, fuses, PE I's, and MOSFETs design and verify your analog and digital circuits before you manual, time-delay, voltage-controlled and breadboard. current-controlled switches And now the best is even better - Electronics independent, voltage-controlled and current- Workbench controlled sources Version 3.0 is here. It simulates more and bigger circuits, and multimeter sets the standard for ease of use. Guaranteed! function generator (1 Hz to 1 GHz) dual -trace oscilloscope (1 Hz to 1 GHz) Bode plotter (1 mHz to 10 GHz) Features in Version t Elctronics SPICE simulation 3 of transient and steady -state Workbench. response new components include Jr'E l s, MOSFETs, Rio voltage-controlled and current-controlled Edr Occult tniw, rYl t'7 iVi sources GJ G and manual, time-delay, voltage- controlled and .F ä current-controlled switches .; IN I real world models for opamps, BJTs, Jr'E 1's, !A >` II' b MOSFETs and diodes - over 100 models available MS-DOS version now supports up to 16 MB of o RAM for simulation of bigger circuits III - new Microsoft® Windows version available !!_ . @ technical support now also available on l*-,.mo_, CompuServe ^ Just $299! ..=a aor 5 r MEG o© . EiûTIZEN tlE MMUS 1 M 6d d 4)ab& nr --'-^- ® , 6 66 8 6 d,6ó=,p Electronics Workbench's Digital Module includes: The electronics lab in a computer"' fast simulation of ideal components AND, OR, XOR, NOT, NAND and NOR gates RS, JK and D flip-flops Call: 800 263 -5552 LED probes, half- adders, switches and seven- segment displays INTERACTIVE IMAGE TECHNOLOGIES LTD. 908 Niagara Falls Blvd. #068, North Tonawanda, NY 14120 -2060 word generator (16 eight -bit words) Telephone: (416) 361 -0333 FAX: (416) 368-5799 logic analyzer (eight-channel) *30 -day money-back guarantee. logic converter (converts among gates, truth Prices in U.S. dollars. shipping $15. Offer valid In U.S. and Canada only. table and Boolean representations) All trademarks are the property of their respective owners. INTER TIVE CIRCLE 167 ON FREE INFORMATION CARD
www.americanradiohistory.comAmericanRadioHistory.Com OCTOBER 1994 Popular Electronics Vol 11, No 10 A GERNSBACK ¡41' PUBLICATION T
C O V E R S T O R Y
31 Build a Home Security System Crime is one of this country's top problems, but this full- featured, commercial -quality security system can help reduce your risk of becoming a crime statistic. It features multiple protection zones, programmable entry and exit delays, autodialer support, panic inputs, and much more -John Taylor, Jr.
C O N S T R U C T I O N
47 Build a Multifunction Car Security System Page 31 Flash your lights, sound your horn, or even disable your ignition from up to 100 feet away- Anthony J. Caristi
62 Build a One -Tube AM Receiver Get great high -fidelity performance from this easy -to -build conversation piece -Larry Lisle
F E A T U R E S
41 Variable Frequency RF Oscillators Page 47 This introduction to variable- frequency oscillators shows how they work, and how you can use them in your own designs - Joseph J. Carr
55 Ground Zero There's a lot of fun to be had at the low- frequency end of the radio spectrum -Karl T, Thurber, Jr
75 Navigation Systems Go Mainstream Learn about the first car -navigation system to be officially offered by a U.S. car maker -Bill Siuru Page 75
Inc -B Bi- County Boulevard, Farmingdale, NY 11735. Second - POPULAR ELECTRONICS (ISSN 1042 -170 -XI Published monthly by Gernsback Publications, 500 subscription rate U.S. and possessions $21.95, Canada Class postage paid at Farmingdale, NY and at additional mailing offices. One -year, twelve issues, all other countries $29.45. Subscription orders payable in U.S. $28.84 (includes G S.T. Canadian Goods and Services Tax Registration No. R125166280), © 1994 by Gernsback Publications, Inc. All rights funds only, International Postal Money Order or check drown on a U.S. bank. U.S. single copy price $3.50. Inc. Popular Electronics trademark is reserved. Hands -on Electronics and Gizmo trademarks are registered in U.S. and Canada by Gernsback Publications, Publications, Inc. Printed in U.S.A. registered in U.S. and Canada by Electronics Technology Today, Inc. and is licensed to Gernsback
Mount Morris, IL 61054-9932 Postmaster: Please send address changes to Popular Electronics, Subscription Dept., P.O. Box 338,
or photographs if their return is desired should they be A stamped self-addressed envelope must accompany all submitted manuscripts and /or artwork photographs while in our possession or otherwise. rejected., We disclaim any responsibility for the loss or damage of manuscripts and /or artwork or
products, techniques, and scientific and techno- As a service to readers, Popular Electronics publishes available plans or information relating to newsworthy used by readers, Popular Electronics dis- logical developments. Because of possible variances in the quality and condition of materials and workmanship in this magazine. for the safe and proper functioning of reader -built protects based upon or from plans or information published claims any responsibility 1
www.americanradiohistory.comAmericanRadioHistory.Com O C T O B E R 1 9 9 4 Popular Electronics
P R O D U C T R E V I E W S Larry Steckler, EHF, CET. editor -in -chief and publisher
18 Hands -On Report EDITORIAL DEPARTMENT Carl Laron, editor OrCad Schematic Design Tools 386+ Robert A. Young, associate editor John Yacono, associate editor 63 Gizmo Teri Scaduto, assistant editor Evelyn Rose, editorial assistant Videonics digital mixer, Sonance in -wall speakers, Brother P- Marc Spiwak, editorial associate Touch PC labeling VCR system, Plus+ Control Tower universal Joseph J. Carr, K4IPV, remote control, and much more contributing editor Marc Ellis, contributing editor Jeffrey K. Holtzman, C O L U M N S contributing editor Don Jensen, contributing editor Marc Saxon, contributing editor 6 Multimedia Watch Multimedia and the MAC -Marc Spiwak PRODUCTION DEPARTMENT Ruby M. Yee, production director Karen S. Brown, 22 Antique Radio production manager A "baby boomer" from Britain -Marc Ellis Kathy Campbell, production assistant Think Tank 24 ART DEPARTMENT Some hobby circuits -John Yacono Andre Duzant, art director Russell C. Truelson, illustrator 77 Computer Bits Fishing for knowledge -Jeff Holtzman Jacqueline P. Cheeseboro, circulation director 82 Circuit Circus Michele Torrillo, POPULAR ELECTRONICS Monitor and detector circuits - Charles D. Rakes bookstore BUSINESS AND EDITORIAL 85 Dx Listening OFFICES Gernsback Publications, DX on the tropical bands Inc. -Don Jensen 500 -B Bi- County Blvd. Farmingdale, NY 11735
1 -516- 293 -3000 87 Ham Radio FAX:1.516- 293 -3115 Using a double -balanced mixer -Joseph J. Carr President: Larry Steckler SUBSCRIPTION ß9 Scanner CUSTOMER SERVICE/ Scene ORDER ENTRY Not -so- private security -Marc Saxon 1- 800 -827 -0383 7:30 AM - 8:30 PM EST
D E P R T E T Advertising Sales Offices A M N S listed on page 138
3 Editorial Composition by Mates Graphics Cover by Loewy Design 4 Letters Illustration by John Zeilinski
10 Electronics Library 45 ABC AUDITED 16 New Products 80 Electronics Market Place Since some of the equipment and circuit- ry described in POPULAR ELECTRONICS may relate to or be covered by U S. 95 Popular Electronics Market Center patents, POPULAR ELECTRONICS dis- claims any liability for the infringement of such patents by the making, using, or 138 Advertiser's Index selling of such equipment or circuitry, and suggests that anyone interested in 139 Free Information Card such projects consult a patent attorney. 2
www.americanradiohistory.comAmericanRadioHistory.Com SURVEILLANCE EDITORIAL & SECURITY FM TRANSMITTERS MINIATURE (KITS) 3 -VOLT FM XMTR, up to 300 ft. indoors, 1500 ft. outdoors PHONE XMTR, range to 500 ft., uses phone-line power Sound -Activated XMTR, range to 500 ft. 2 -STAGE XMTR, 9 -Volt, very powerful A MATTER OF SECURITY All above require simple soldering at 2 to 4 places. Broadcast on std FM band. Assemble in less than 5 In poll after poll, when Americans are asked what the number - minutes. Any of the above $29.95** one problem facing our country is, crime ranks at or near the TELE CALL FORWARDER. Transfers top. Many of us no longer feel safe in our homes or even our incoming calls to any number you cars. That's not surprising considering that newspapers and select. $99.00* radio and TV news broadcasts are filled with sometimes horri- CALLER ID. Registers incoming numbers. fying accounts of increasingly brazen and sensational criminal number and stores to 50 $99.00' deeds. TEL REGISTER WITH PRINTER. Records dialed number, duration, and While some would have you believe otherwise, there is no prints record. 16 -digit display with security lock control. Stores up to 40 easy way to immediately solve this important problem. But calls. $149.00* can take to reduce your risk of becoming a there are steps you TEL REGISTER W/O PRINTER. crime statistic. This month, Popular Electronics presents two Records dialed number and time. stories to help you do just that. 16 -digit display. Holds up to 145 num- bers in memory. $99.00` 12 -HOUR LONG -PLAY RECORDER. In Build a Home Security System, we present a full- featured, Modified Panasonic. Records 6 hrs. commercial -quality security system. It has multiple protection on each side of 120 tape (supplied). zones, programmable exit and entry delays, panic inputs, and Compatible with VOX and Tel Rec Adapter. $119.00' much more. It also has provisions to flash your house lights VOX VOICE -ACTIVATED SWITCH. and to activate an autodialer to call for help in the event of a Makes recorder self- activating with break in. The story begins on page 31. voices or other sounds. Great for radios and scanners. Provisions for external mike and /or patch cord. In Build a Multifunction Car Security System, we show an RF $28.50** remote control that can be used in a variety of security func- TELEPHONE RECORDING ADAP- tions. You can use it to flash your vehicle's lights or to sound TER. Records incoming and outgoing handset controls its horn from as much as 100 feet away. That can let you easi- calls. Use of recorder and records both sides of ly find your car in a dark, deserted parking lot, scare away sus- conversation. $28.50* picious who are loitering near your car, or get atten- characters TELEPHONE SCRAMBLERS. Over tion in an emergency. 51,000 separate codes; impossible to break code. Assures utmost privacy. $295.00* remote be set up to disable your car's ignition The can also VOICE CHANGER. Changes man's system. That last feature can save your car in the event of a voice to lady's and vice versa. 4 sep- carjacking, while giving you enough distance and time to get to arate settings. Ideal for disguising safety. The story begins on page 47. voice. $29.95** RF BUG DETECTORS, AND MUCH MORE For Shipping and Handling add '$5.00 and "$2.00 per item. Colo. residents add sales tax. Mail Order. VISA, M /C, COD's o.k. Inquire for dealer prices. Free catalog. TOLL FREE 1- 800 -926 -2488 Laron Carl A.M.C. SALES, INC. Editor 193 Vaquero Drive Boulder, CO 80303 Tel: (303) 499 -5405 Fax: (303) 494-4924 Mon -Fri 8 a.m. - 5 p.m. Mtn. Time
CIRCLE 151 ON FREE INFORMATION CARD
www.americanradiohistory.comAmericanRadioHistory.Com NOISE- REDUCTION SYSTEM CORRECTION I was very impressed with your presentation LETTERS of my article, "The Universal Noise -Reduction Sys- tem" (Popular Electronics, July 1994). However, two art-
work mistakes did creep in. In everyone seems to be com- electronics hobbyist, as I sus- have been satisfied with the
the schematic diagram (Fig. 2), menting on what they would like pect a lot of your readers are. I instructions, construction, and resistor R9 is shown in the to see included in the maga- think it would be great to ex- performance of the units.
wrong place: one end should be zine, I thought I would forward a pand the "Haves & Needs" I also bought and assembled located at the junction of pin 4 few of my own. portion of the Letters section the universal noise -reduction
of U2 and R8, and the other end First, because I have always into a separate column in which system (featured in the July should go to ground. In the been fascinated by the growth readers could exchange parts issue) from Vista in
parts -placement diagram (Fig. and diversity of computers, I and information that they have Bollingbrook, IL. The kit went 5), the locations of R7 and R8 look forward to every Popular accumulated in their junk boxes. together easily and works per-
have been swapped. I hope that Electronics article that covers Finding parts and accessories, fectly. I will be using it in my
this clears up any confusion. peripherals. For example: All or even literature, is nearly im- home recording studio. I called RICHARD PANOSH About Parallel Port Signals" possible these days, yet many Vista to compliment their prod- (January 1992), "Troubleshoot- readers have collections of all uct, and found that it was their
ing Parallel Connections" sorts of electronics stuff. I, for first consumer -electronics kit. I COMMENTS AND (February 1992), "Programming one, cannot bring myself to encouraged them to market SUGGESTIONS Serial Ports' (August 1993), and throw away good electronic more in the future. They were I have been a subscriber to "Computer Viruses' (September "junk." very friendly and helpful in ship-
Popular Electronics since the 1993). Those articles were ex- For example, I have a ping my kit out quickly so that I late 1960's and I thoroughly en- cellent. Keep up the good work Tektronix 3B3 plug -in timebase could have it for the following
joy each and every issue. I with more articles on disk con- module that I have no use for. weekend's recording project. especially appreciate the con- trollers, disk drives, video/ Perhaps one of your readers R.M.
struction articles and have built graphic boards, and memory needs one. On the other hand, I Norcross, GA many projects, but that would expansion. also have a request for "Haves
be a story in itself. Because Second, I consider myself an & Needs." I am looking for the HAVES & NEEDS operating and service manuals I'm trying to fix a Goldstar color for a C-1 B electric power plant TV, model #CMT-9325, serial manufactured by E.A. Laborato- #KC- 60401070. I need a copy ries, Inc., of Brooklyn, New of the schematics, especially York. I would gladly pay for the power supply. I will pay for copying and shipping. postage and copying costs. Thank you for hearing me JODY WHITE A/GH out. I look forward to every 6130 Keating Road issue of Popular Electronics Pensacola, FL 32504 because I know there will al- ways be something worth reading about. I need to buy an owner's man- JOE NOWINSKY ual, schematic, and probe for a Route 1, Box 261 B +K Precision dual -trace os- Florence, TX 76527 cilloscope model 2120 and a Meguro 1 -GHz spectrum ana- lyzer. Can any of your readers ONE MORE KIT help me to obtain those items? AN IMPORTANT PART COMPANY RUDY SERRANO The article on electronic kits 6 Fl., No. 51, Sec. 2 OF YOUR PHOTOCOPIER that appeared in the July 1994 Chuncking So. Rd. issue of Popular Electronics Taipei, Taiwan, R.O.C. ISN'T PART OF was very well written and infor- mative. At YOUR PHOTOCOPIER the end of the article, I am seeking information on a several firms that offer elec- commercial Pacman game. The Having a machine may not permit you to photocopy tronic kits are mentioned. I nameplate on the game has the books, journals, newsletters and magazines. would like to add one more to following information, with Japa- your list: PAIA Electronics, Inc. line: The Copyright Clearance Center CAN. nese characters on each The company is located at 3200 95 -1655 NNO Contact us to find out Teakwood Lane, Edmond, OK 100 V how you too can COPY RIGHT!SM 73013. The phone number is 100 W 405 -340 -6300, and the fax 10/60 Hz COPYRIGHT CLEARANCE CENTER number is 405 -340-6378. 666033 PAiA offers musical, MIDI, au- NANAO. 222 Rosewood Drive, Danvers, MA 01923 1èi. (508) 744-3350 Fax (508) 741 -2318 dio, audio effects and Thanks for your help. ©1999 Copyright Clearance Center processors, and audio recording JOHN MROZKO
accessory kits. I have as- RR1, Box 28 sembled two of their kits, and Cohoes, NY 12047
www.americanradiohistory.comAmericanRadioHistory.Com Be The Boss Of Your Own Bookkeeping And Accounting usiness Now NRI makes it easier than ever to be your own boss. NRI's innovative new at-home training in Contemporary Bookkeeping and Accounting guides you step -by -step from the basics of bookkeeping to more advanced accounting techniques...plus gives you hands -on experience with today's most exciting new accounting tool: a powerful AT- compatible computer system you train with and keep!
Your timing couldn't be better! Only NRI's new hands -on training With NRI's step -by-step training, you'll soon be gives you the opportunity to make the most of three of today's using your computer as comfortably as you now most exciting new developments: use a pencil, doing in minutes the kinds of procedures that can take hours to do manu- The persistent and growing need for bookkeeping and ally- giving you more time to make money accounting services by virtually every business, association, and offering your bookkeeping and accounting organization operating today expertise to your clients! The computer revolution that's transformed traditional Get the business savvy you need bookkeeping and accounting practices and techniques to set up shop at home And the home office boom -with more than 25 million Americans currently working in a home - NRI goes beyond giving you based business of their own and more than 15 technical expertise in bookkeep- million more entrepreneurs expected to join ing and accounting to give you the home-based ranks by the year 2000. the business knowledge you need to succeed as a home -based Only NRI's Contemporary Bookkeeping entrepreneur. You learn how to and Accounting course prepares you to set up the ideal home office, how capitalize on all three, with comprehensive to get and keep good -paying training in every aspect of bookkeeping clients, how to budget your and accounting, plus hands-on training with resources, grow your profits, and a powerful IBM -compatible computer and much more. And NRI's experienced professional General Ledger software, plus instructors are always available with the business knowledge you need to make technical advice, encouragement, your home -based enterprise thrive. and support as you get your business off the ground. Start earning while you learn Even if you decide to wait Among the most popular home -based before setting up shop at home, services today, bookkeeping and your new understanding of accounting offers tremendous advertising, customer relations, and money- making potential for the other business principles will help trained professional. And NRI's you generate part-time income or unique new training helps you move up to a responsible position take advantage of this earnings with your present company. potential quickly and easily. Send today for FREE catalog NRI starts you ..a out with the tried- To find out how NRI's at -home training and-true basics of can prepare you to start a profitable bookkeeping bookkeeping and and accounting business of your own, send for NRI's free, accounting, cutting through unproductive -busy work" to give you full -color catalog. Or choose to send for information about one of the skills that really count. Before you're halfway through your NRI's many other courses designed to help you be your own boss. course, you'll be able to pick up part-time income preparing If the coupon is missing, write to NRI Schools, McGraw-Hill balance sheets, profit- and -loss statements, Continuing Education Center, 4401 Connecticut Avenue, NW, and other financial reports for local businesspeople. And that's Washington, DC 20008. just the beginning! Only NRI gives you an AT- compatible computer and friendly, "walk- you -through" software to r Ní?/schools 1r,,; train with and use in your new business McGraw -Hill Continuing Education Center 4401 Connecticut Avenue, NW, Washington, DC 20008 Once you've mastered the essential basics, you're g Check one only ready to make the leap to contemporary accounting Bookkeeping and Accounting techniques with a computer. And you'll get hands -on Desktop Publishing and Design Paralegal training with the IBM- compatible computer that's Word Processing Travel included in your course. Computer Programming Writing That's right! You get a powerful IBM PC /AT- compatible system a of RAM, high -resolution monitor, and featuring full megabyte Agc floppy disk drive-p/us professional General Ledger software Name (please print) ingeniously designed to speed your learning process. Even if you make a mistake, your user- friendly software points Address you in the right direction with easily understandable instructions doubles as in plain English. Best of all, this same training software C1It' St:iir Zip 2935-IM1 a complete bookkeeping and accounting package you can use to Aìcrcditcd 1lcnlher. N.iti,m;i1 I iurnc Cixutcì set up the books for your business clients.
www.americanradiohistory.comAmericanRadioHistory.Com MULTIMEDIA WATCH
By Marc Spiwak As I mentioned last connectors are clearly ing on a drive icon in month, I've got a marked and easy to identi- Windows becomes second Macintosh Performa 600 on fy. The connectors on PC's nature after a while. loan to me for a period of are often confusing. My main interest in the time. That time period is Although I did not have Mac was in how it handled
soon to expire, so I figured I the pleasure of installing multimedia. Both my PC would tell you what my ini- new hardware in the Mac, I and the Mac have double - tial impressions of a Mac am told by some reliable speed, CD -ROM drives, but The Mac and are. I've always worked with sources that it's without a my PC has a definite edge PC's, but I've played with a doubt much easier to in- in memory (16 Megs versus The PC few different Mac's over the stall, say, a modem in a the Mac's 5) and speed (50 years. We all know what a Mac than it is in a PC. New MHz versus 32). I have to say Worlds Are pain in the neck PC's can hardware is instantly recog- that even with the Performa be, even for expert users, nized and configured by 600's limited horsepower, Similar and we know even better the Mac at power -up. We multimedia applications what a mystery they are to all know how miserable life seem to run quite satisfac- inexperienced users. can be when installing a torily. I have a bunch of In that respect, Mac's are new expansion card in a multimedia titles including supposed to be different PC.) So the Mac wins Hell Cab and Iron Helix for than PC's, and they are, hands -down where hard- both the Mac and PC plat- ware upgrades are forms. It seems that the concerned games run almost identi- However, I'm not so sure cally on both machines, how important that is. It except for an edge in seems to me that experi- speed on the faster PC. enced PC users will always To sum up, I'm sure that a manage to get a new de- top -of- the -line Mac will vice to work, although it blow the doors off my now - might take a little blood, dated DX2 -50 in multi- sweat, and tears. An inex- media applications, but my perienced user, on the DX2 is still far from obsolete.
other hand, would probably If I had to recommend ei- never crack open the case ther platform for a on a computer in a million complete computer green-
years. horn, I would probably go Most software was al- with the Mac because it's ready set up for me on the easier to set up and use.
Mac, so I can't say whether However, PC's are still much software installation in gen- cheaper, and are getting The PC GamePad is the perfect controller for quick- response eral is easier on a Mac than easier to use all the time. games like Pac Man. a PC. Navigating through a (Will plug-and -play cards Mac interface is quite easy ever work reliably? We'll for experienced Windows know soon enough.) For especially for people who users, and some aspects someone who has had know little or nothing about are much more user- friend- some experience with com- computers. A Mac is defi- ly. For instance, any disc (or puters, and is interested in
nitely easier to set up than diskette) inserted into the getting into multimedia, I a PC. All peripherals that Mac generates its own icon would have to recommend
come with a Mac are on the screen. But as I said a PC because of its more
made specifically for the before, that is only of signifi- generic availability. I guess Mac by Apple, so they all cant value for people that a long -time PC user will work very well together. All unfamiliar with PC's, as click- almost always push the PC
www.americanradiohistory.comAmericanRadioHistory.Com platform and a Mac user will always push the Mac. Maybe that's because both Heathkit Heathkit Heathkit Heathkit Heathkit worlds are closer than one Course in might think; the advantages Master of either are not over- Electronics Technology whelming, so users stick with what they know. No one can This com- match the prehensive WEIRD CONTROLLERS, quality and course CONTINUED value of delivers I have been testing out a this superior neat little game controller Heathkit instruction called the Gravis PC course. and makes GamePad from Advanced Using learning Gravis. The GamePad is a videos, easier and Nintendo -like controller with computer - more fun. a small tiltable thumb pad aided R. Compare on one end and four but- instruction, this course tons on the other. The trainers, with any test instru- 0 4'i`. and all ments, and What You'll Learn: scmicntduc tors, Circuits and others. WHERE TO GET IT Phis s'aluc-pJCked course ufltrs I)igìtal l'cchnique. (more Heathkit texts, it's cou so much mur: than courses skit ancrd courses are avail - everything from the other goes." With .Il It) Inuit gel all the training offers the and tes, equipment all at once, Advanced Gravis Heathkit, you gel a program of most effec- you need i% much more Cflec- right along with your course 1790 Midway Ln. studs that at the tice. more,ttjo)ahlc. and murs materia s.. You'll get graded tive and Bellingham, WA 98226 practical on cour pockdbook and examinations, bas's access to Tel. 604- 431 -5020 right price. your cchcdltic to Suc CCS <. instructors, and etrn CEL's, prat 0t1 .?lIabout 1) Ind AC Call or wrireJt ?Zlat Apple Computer, Inc. Heathkit 455 Riverview Drive Benton Harbor, MI 49023.1288 20525 Mariani Avenue Cupertino, CA 95014 For a Full -Line Catalog of Electronics and Computer Courses, call 1- 800 -44 -HEATH calling, please mention this code: Tel. 408- 996 -1010 0+994 HealnCOmpany When CIRCLE 155 ON FREE INFORMATION CARD Aris Multimedia Entertainment 310 Washington Blvd., Suite 100 Marina Del Rey, CA 90292 Tel. 310 -821 -0234 device is small and easy to throttle control that lets you Corel Gallery, and it's pub- Corer Corporation hold. The thumb pad is tilt - put your attention lished by the Corel The Corel Building able in any direction, and a elsewhere. It also has five Corporation. Corel Gallery 1600 Carling Avenue small joystick handle can programmable fire but- contains 10,000 high -quality Ottawa, Ontario, be screwed into the pad. tons-two on top of the clip -art images on CD- Canada K1Z 8R7 This stick, Iwo on the side, and a ROM, with over 6000 of Tel. 613- 728 -8200 provides you with a tiny thumbstick with very fast re- trigger-so you can them in color. Grolier Electronic action times, but less customize its operation to Now I know that CD- Publishing, Inc. Rare ROM's can make some Sherman Turnpike accuracy than a full -sized your liking. among Danbury, CT 06816 joystick. This thumb action is joysticks is the Pro's ability to things in life much easier, Tel. 203- 797 -3500 perfect for a game like Pac adjust the tension on the but searching through one HyperGlot Man where you have to slick from completely loose filled with thousands of im- P.O. Box 10746 make rapid movements up, (where the stick flops ages can get tedious, and Knoxville, TN 37939 down, left, or right, but not around without centering) you're bound to miss the Tel. 615- 558 -8270 so hot for games like flight to very tight. A six -foot cord image that's just right for a infoBusiness simulators. With a list price and a foam - padded han- particular application. The 887 South Orem Blvd. is of only $29.95, I give the dle complete this very nice beauty of Corel Gallery Suite B GamePad a Thumbs up! $59.95 package. that all 10,000 images are Orem, UT 84058 also printed in a book. I find Tel. 801- 221 -1100 If you're more into flight games, then the Gravis NEW STUFF that it's much easier, and NovaLogic is I received one faster, to look through im- 19510 Ventura Blvd. Analog Pro joystick what's recently Suite 200 right for you. This is Ad- of the most useful and user - ages in a book than it is on- Tarzana, CA 91356 vanced Gravis' top- of -the- friendly CD -ROM's I've ever screen. Then, the chosen Tell 818- 774 -0600 line joystick, and it shows. seen. Part of what makes clip art can be pulled from
World Library, Inc. This joystick is extremely this package useful is that it the disc quickly. Although I 12914 Haster Street well -made, and will stand comes with a book-you wouldn't have a use for Garden Grove, CA 92640 up to years of rough han- know, the paper kind. Any- them, the disc includes Tel. 714- 748 -7197 dling. The stick has a built -in way, the package is called hundreds of celebrity
www.americanradiohistory.comAmericanRadioHistory.Com portraits (some look accu- Also from Aris is the rate and some not so Multimedia Starter Pack. accurate), That aside, thou- This package includes Aris' sands of other useful MPC Wizard 2.0 which helps fp R images, in 50 different cat- you test, tune, and trou- egories, are also present. bleshoot a multimedia PC. The clip -art package has a Also contained is WinTutor list price of $59, and it's the 3.1, a multimedia Windows easiest one to use that I've Tutor on CD -ROM, and ever seen. WorldView, a MediaClips Clip -art of a different disc with an outer -space sort-photographic rather theme. Specially priced at than drawn -came to me $29.95, this 3 -disc set makes from Aris. Two new a nice gift for someone MediaClips discs - new to multimedia. Americana and New York, Another useful disc, es- NY-contain high -resolution pecially if you want to learn photos, video, and audio how to speak Spanish, is clips. Each disc contains Learn To Speak Spanish 100 photos in TIFF BMPand from HyperGlot, This multi - PICT formats; 25 videos in disc set is the multimedia Video for Windows, Quick - way to learn Spanish. While Time, and MPEG formats; I've mentioned HyperGlat's and 100 Music clips in WAV software before (they have and SND Resource formats. products for many different All material is royalty -free, languages), this is a new and so you are free to use it version with a much -im- as you like. These discs retail proved user -interface, and for $29.95. the product now includes Corel Gallery is a collection of /0.000 pieces of clip art on CD- ROM. A full -color book included in the package makes it easy to search for the clip art that's just right for an application. In the No vember,1994 Issue digitized video. A disc that's fun for chil- From InfoBusiness, Job - dren and adults is Power Source is the multi- Prehistoria, from Grolier media way to brush up on Electronic Publishing. This is Popular Electronics your job- finding skills for the a very entertaining disc 90's. This disc contains corn - that chronicles all kinds of Build the TEST GEAR you need for your work/repair- plete books and plenty of prehistoric life -not just di- bench and save big bucks! Here are four winners: other text, two hours of vid- nosaurs. Prehistoria covers Autoranging Frequency Counter -Go up to 50 eo training clips, interactive over 500 prehistoric species MHz with this easy -to -build project. worksheets, and more. If of animals that roamed the Autoranging Capacitance Meter-If it's between 1 you're looking to begin a earth over a period of 500 pF and 1000 NF, you get a valid reading. career, or start a new one, million years. The disc sells Battery Ampere -Hour Meter -Provides an then maybe this $49.95 disc for $69.95. accurate indication of battery's condition and is a good place to start. The folks at NovaLogic remaining charge. Library of the Future, Third write some amazing soff- "Gate -Dip" Meter-Determine resonant frequency Edition, from World Library, ware, in particular of tuned circuits and antennas. Inc., adds the complete text Comanche CD, which is PLUS outstanding columns and departments like of nearly 1,500 new titles to the best helicopter -combat Gizmo, Think Tank, DX Listening, Scanner Scene, the second edition of the simulator we've ever seen. Ham Radio, Computer Bits, Circuit Circus, Multimedia disc, for a total of 1750 The CD contains all three Watch and more! literary titles on one disc. Comanche games in the On Sale While it's not as convenient series, and is an excellent to read a book on- screen buy at a list of $74.95. Se tember 16, 1994 or laser- printed as it is with WolfPack is another great an actual book, there is no simulation game, but it's of Pick up Popular Electronics at your favorite better way to research one a World War Il naval battle. Newsstand, Bookstore, Convenience Store of the books than with this With a list price of only or Supermarket CD -ROM, and for $395, it's a $39.95, WolfPack can't be relative bargain. beat.
www.americanradiohistory.comAmericanRadioHistory.Com Take this GIANT CIRCUIT LIBRARY for only $9.95 when you join the Electronics Engineers' Book Club® THE ENCYCLOPEDIA OF ELECTRONIC CIRCUITS -VOIs. 1, 2 & 3 by Rudolf F. Graf Hundreds of circuit ideas alphabetically arranged - from Alarm circuits to Zero crossing detector circuits! ... includes schematics for the latest electronics circuits from industry leaders... -Popular Electronics Turn to this comprehensive circuit library for hundreds of project ideas ... valuable troubleshooting and repair tips ... and concise pinout diagrams and schematics. In each volume you'll find more 11,EC1'Rt) than 700 electronic and (l('()1,1',,,;'l integrated circuits and A 100+ circuit categories right at your fingertips $180.00 to give you ideas you Value! can use on the job or at your workbench. 2,344 total pages 3,490 total illustrations Book No. 5489C Hardcover
17294 -0860 If coupon is missing, write to: Electronics Engineers' Book Club, Blue Ridge Summit, PA
As a member of the ELECTRONICS ENGINEERS' Electronics Engineers' BOOK CLUB ME Book Club .. . Blue Ridge Summit, PA 17294 -0860 .. you'll enjoy receiving Club bulletins every 3-4 YES! Please send me The Encyclopedia of Electronic. Circuits - weeks containing exciting offers on the latest Vols. 1, 2 & 3 (5489C), billing me $9.95 plus shipping/handling & Book baoks in the field at savings of up to 50% off of tax. Enroll me as a member of the Electronics Engineers' outlined in this ad. If not satisfied, I regular publishers' prices. If you want the Main Club according to the terms may return the books within 10 days and have my membership Selection do nothing and it will be shipped cancelled. automatically. If you want another book, or no book at all, simply return the reply form to us by Name the date specified. You'll have at leant 10 days Address to decide. And you'll be eligible for FREE BOOKS through the Bonus Book Plan. Your only obliga- City tion is to purchase 3 more books during the ne>:t State 2 years, after which you may cancel you Zip Phone membership at any time. Valid for new members only, subject to acceptance by EEBC. Canada must remit in U.S. funds drawn A on U.S. banks. Applicants outside the U.S. and Canada will receive special ordering instructions. Publisher's price shown. its':1994 EEBC shipping/handling charge 8 sales tax will be added to all orders. PPIF1094 9
www.americanradiohistory.comAmericanRadioHistory.Com ELECTRONICS LIBRARY
Popular Electronics columnist high- frequency dipole, vertically Joe Carr has updated his hot - polarized HF, hidden and lim- THE COMPREHENSIVE selling, project -packed book to ited- space, VHF /UHF GUIDE TO include all -new BASIC comput- transmitting and receiving, er programs for antenna design multi -band, tunable -wire, short- , and impedance matching, ex- wave, microwave, mobile, TrA cef Practical panded coverage of long -wire marine, and emergency anten- :i`i,] V`1 TIME directional - J antennas and radio nas. The book also explains Antenna wave propagation theory, and how to match load im- BY antenna STEVE A. D(IUGUSS. new material on small loop di- pedance to an RF source or Handbook: rection- finding antennas. Like transmission line and how to a...11,w«..watut..,.a. a:,..r.s vIK1NEBia4ry,nauenc.. the first edition, the focus is on use the Smith chart for prob- {Nor ase Fero wakboas Auer' NItv lontw9ry Second practical information that you lem- solving, and outlines E»o.,. can easily put to use designing, antenna grounding techniques. Krey Edition building, and installing anten- Practical Antenna Handbook: nas -even if your experience is Second Edition costs $26.95 years. He includes photos and by Joseph J. Carr limited. and is published by Tab Books illustrations of secret aircraft, Inc., Blue Ridge Summit, PA and a video still of the "TR -3A 17294 -0850; Tel: Black Manta," which the Air 1- 800 -233-1128. Force still denies exists. CIRCLE 98 ON FREE The Comprehensive Guide to INFORMATION CARD Military Monitoring is available for $19.95 plus $4.00 shipping THE COMPREHENSIVE (Priority Mail) from Universal GUIDE TO MILITARY Electronics, Inc., 4555 Groves MONITORING Road, Suite 13, Columbus, OH by Steve A. Douglas 43232; Tel: 614 -866 -4605; Fax: 614 -866 -1201. Ironically, the complexity that CIRCLE 90 ON FREE gives military monitoring much INFORMATION CARD of its appeal also scares off many would -be listeners. This LEARN DOS 6.2 IN A book aims to demystify the DAY world of military monitoring, by Russell A. Stultz spelling out in simple terms - with no techno -jargon -how Designed with the beginner it anyone can monitor military ra- mind, this tutorial makes it easy dio communications with a to master the most common minimum of confusion and cost. DOS commands with practical, The book explains the equip- hands -on activities. It guides ment needed to tune military readers through the important frequencies, and provides a commands that are found in "milspeak" dictionary to help every version of MS -DOS, and readers understand military lin- also explains how the new DOS go. The book also includes a 6.0 and 6.2 utilities can be used base -by -base listing of all mili- to enhance computer opera- tary frequencies, the top tions. The book provides the nationwide frequency listings, means to quickly identify which The book provides all the maps of military bases and re- commands are available in later nuts -and -bolts information you fueling tracks, a source guide, versions, but unavailable in ear- need to make antennas work, and a complete listing of the lier versions, of MS -DOS. With and then shows you how to U.S. Navy's FLTSATCOM chan- an emphasis on learning by extend that knowledge into new nels. doing, the book has readers projects that involve designing, In the final chapter, the author formatting disks, copying files, building, modifying, or installing describes the shadowy world of and displaying their contents antennas. A wide array of an- stealth aircraft, which he has within minutes after opening its 10 tenna types covered, including been monitoring closely for cover.
www.americanradiohistory.comAmericanRadioHistory.Com spreadsheet documents. The bundled disk provides source code and exciting multimedia presentations that are ready to Earn Your B.S. Degree be used. Easy Multimedia: Sound and in Video for the PC Crowd costs COMPUTERS $24.95 and is published by Windcrest/McGraw -Hill, Blue or Ridge Summit, PA 17294 -0850; ELECTRONICS Tel: 1- 800-233 -1128; Fax: 717 - 794 -2103. CIRCLE 96 ON FREE INFORMATION CARD
NUM IL SW FISHER WORLD TREASURE NEWS Learn DOS 6.2 in a Day costs Volume 5, Issue 1 $12.95 and is published by from Fisher Research Word ware Publishing, Inc., 1506 Laboratory Capitol Avenue, Plano, TX 75074; Tel: 214 - 423 -0090. This 28 -page, magazine- format j CIRCLE 91 ON FREE newsletter documents valuable INFORMATION CARD discoveries made all over the By Studying at Home world by people using Fisher College of Engineering, metal detectors. The newsletter Grantham now in our 44th year, is highly experi- EASY MULTIMEDIA: contains sections on archae- enced in "distance education" teaching SOUND & VIDEO FOR ology, gold prospecting, - THE PC CROWD underwater treasure hunting, by correspondence- through printed by Ori Gurewich and Nathan materials, computer materials, fax, Gurewich modem, and phone. FISHER-_ WORLD TREASURE NEWS,' No commuting to class. Study at your own pace, while continuing on your Whether or not you have a CD- 01([41.1100 hc1tt ROM drive, sound board, or present job. Learn from easy -to- programming expertise, this understand but complete and thorough book -and -diskette package lesson materials, with additional help shows you how you can create from our instructors. vivid, dramatic multimedia pre- Our Engineering Technology B.S. sentations for business, Degree Program is available in either of educational, or personal use. two options: The book reveals how to put (1) The B.S.E.T. with Major Em- Si, 0 6000 multimedia to work in applica- phasis in Electronics, OR tions that feature full- motion (2) The B.S.E.T. with Major Em- video, sound and sound record- phasis in Computers. ing, and colorful animation. In a Our Computer Science B.S. Degree humorous, non -technical style, and the use of metal detectors Program leads to the B.S.C.S. -the it explains how to add sound in law enforcement. It features Bachelor of Science in Computer Science. and video to presentations, use stories on the lost legions of An important part of being pre- Windows -compatible sound Rome, a 23 -ounce gold nugget, pared to move up is holding the right cards, synchronize music and a Civil War battle site, an 1874 college degree, and the absolutely neces- video files, create animated key -date coin worth more than sary part is knowing your field. shows on the PC, and incorpo- $10,000, and a scuba -diving Grantham can help you both ways -to rate multimedia into everyday show. learn more and to earn your degree in word- processing and The Fisher World Treasure the process. News is free upon request from Write or phone for our free catalog. Laboratory, Fisher Research Toll free, 1- 800 -955 -2527, or see 200 West Wilmott Road, Dept. mailing address below. PE, Los Banos, CA 93635; ta Tel: 1- 800 -M- SCOPE -1. Accredited by CIRCLE 92 ON FREE the Accrediting Commission of the INFORMATION CARD National Home Study Council
LOTUS NOTES ANSWERS: Certified GRANTHAM Tech Support College of Engineering by Polly Russell Kornblith Grantham College Road The author teamed up with Cor- Slidell, LA 70460
www.americanradiohistory.comAmericanRadioHistory.Com porate Software Inc., one of the ing its "So long as what you put of electronics and computer ter- world's largest providers of tech- up does not look like a ham minology. Written for students nical support, to produce this The antenna, it's not likely to be and hobbyists, as well as pro- comprehensive, easy-to -use Virtua questioned" motto, the book fessional technicians and book. Handling 200,000 tech- provides a wealth of ingenious engineers, terms are defined nical questions via phone each Reality ways to hide antennas- includ- clearly and with as little tech- month, Corporate Software de- ing placing them inside nical jargon as possible. termined the questions most flagpoles or arbors, or disguis- The dictionary includes frequently asked by users of ing them as bird -house poles or scores of abbreviations, acro- Lotus Notes. Both the questions tomato -plant supports! It covers nyms, illustrations, schematics, and the answers appear in this outdoor, indoor, high- frequency, diagrams, and conversion ta- book, eliminating the need to and VHF /UHF antennas, and bles. It thoroughly covers the call the tech support helpline or presents methods to disguise terminology of computers, waste time trying to find the robotics, lasers, TV, radio, IC answer in voluminous user's technology, digital and analog experience, this book shows electronics, audio and video, readers how to create virtual power supplies, and more. The reality in their own homes. It -HIDDEN- new edition contains updated LOTUS NOTES offers plans for 14 inexpensive 1 definitions and hundreds of new ANSWERS projects, designed to be hooked terms. Certified up to a home computer, that The Illustrated Dictionary of Tech can be built even by those with Support HAM Electronics: Sixth Edition costs no programming or electronics $28.95 and is published by Tab background. Projects include ANTENNAS Books Inc., Blue Ridge Summit, adapting existing hardware PA 17294 -0850; (such as Nintendo PowerGloves Tel: 1- 800 -233 -1128. and VictorMaxx 3D goggles) to work on your PC, and building CIRCLE 98 ON FREE INFORMATION CARD your own 3D goggles, motion trackers, and 3D sound sys- tems from scratch. The book them all. It also discusses an- VOODOO OS /2: TIPS & manuals. A wide range of Lotus comes with a disk that includes tenna tuners, grounds, and TRICKS WITH AN Notes topics are covered, from all the software needed to test, counterpoises, and recom- ATTITUDE FOR OS /2 2.0 adding and opening multiple calibrate, and run the gear that mends some easily disguised AND 2.1 databases, to using Views, to you build. Even before you build commercial antennas. by Allen G. Taylor organizing and retrieving infor- any of the projects, you can Hidden Ham Antennas is mation. The book covers all the explore the virtual worlds in- available for $12.95 plus $2 Taking the mystery out of OS /2, common pitfalls and trouble cluded on the disk using just shipping and handling ($3 for- this book offers a wealth of tips spots associated with Lotus your mouse and monitor. Pro- eign) from Tiare Publications, intended to help users quickly Notes, including protecting and grammers will appreciate the C- P. O. Box 493, Lake Geneva, take advantage of the fastest sending documents, and de- code tips in the book and the WI 53147; Tel: 800 -420 -0579. and most reliable PC operating ciphering error messages. It source code on the disk. The CIRCLE 101 ON FREE system. Filled with speedy solu- explains how to use-functions to disk also includes six virtual INFORMATION CARD tions to common problems and look up information in other doc- worlds in which you can tour a answers to questions that are uments or databases, how to virtual park, play racquetball in THE ILLUSTRATED frequently asked but not well - use encryption to protect your a virtual court, fly a jet, battle a DICTIONARY OF documented elsewhere, the mail, and how to import and robot in a shooting game, con- ELECTRONICS: book shows users at all levels export data to and from Notes. struct an ancient Greek temple Sixth Edition how to use OS /2 to accomplish Finally, the book tackles the in three dimensions, and battle by Stan Gibilisco more in less time. The book "Top Ten Tech Terrors" and of- a friend via modem or cable explains how to launch and nav- fers "Frustration Busters" hook -up in cyberspace combat You can't keep up with any fast - igate OS /2, focusing on dialog intended to help prevent prob- simulation. changing field if you don't un- boxes and controls. It shows lems before they occur. The Virtual Reality Con- derstand its specialized lingo. readers how to adapt OS /2 to fit Lotus Notes Answers: Cer- struction Kit book and disk set This handy reference allows you their needs by choosing colors tified Tech Support costs $16.95 costs $27.95 and is published to find, at a glance, definitions and transforming the desktop. It and is published by Osborne by John Wiley & Sons, Inc., 605 explains how to run OS /2, Win- McGraw-Hill, 2600 Tenth Street, Third Avenue, New York, NY dows, and DOS applications, Berkeley, CA 94710; Tel: 10158 -0012; Tel: 212 -850 -6336. and how to use the Workplace 510- 549 -6600; Fax: CIRCLE 93 ON FREE Shell to manipulate objects and 510-549 -6603. INFORMATION CARD find lost files. CIRCLE 100 ON FREE Voodoo OS/2: Tips & Tricks INFORMATION CARD HIDDEN HAM with an Attitude for OS/2 2.0 ANTENNAS and 2.1 costs $24.95 and is THE VIRTUAL REALITY by Frank P. Hughes, VE3DQB published by Ventana Press, CONSTRUCTION KIT P. O. Box 2468, Chapel Hill. NC by Joe Gradecki If you live in a neighborhood or 27515; Tel. 919 -942 -0220; Fax: apartment complex that places 919-942 -1140. Intended to provide "total im- restrictions on ham antennas, CIRCLE 102 ON FREE 12 mersion" in the virtual -reality this is the book for you. Follow- INFORMATION CARD I
www.americanradiohistory.comAmericanRadioHistory.Com Just like these Graduate with an Associate Fully Trained Electronics Degree from CIE! Professionals CIE is the best educational career skills. Each lesson is value you can receive if you designed to take you step - want to learn about by -step and principle -by- electronics, and earn a good principle. And while all of electronics. And every CIE income with that knowledge. CIE's lessons are designed Course earns credit towards CIE's reputation as the world for independent study, CIE's the completion of your leader in home study instructors are personally 'Thanks to CIE I have tripled my previous Associate in Applied Science electronics is based solely available to assist you with salary, and 1 am now in a challenging and Degree. So you can work where only the sky is on the success of our just a toll free call. The result rewarding new field toward your degree in stages the limit." graduates. And we've is practical training... the kind or as fast as you wish. In fact, Daniel Wade Reynolds earned our reputation with of experience you can put to Industrial Electrician CIE is the only school that an unconditional commit- work in today's marketplace. Ore -Ida Foods actually rewards you for fast ment to provide our students study, which can save you with the very best electronics LEARN BY DOING...WITH money. training. STATE -OF- THE -ART Just ask any of the EQUIPMENT AND 150,000 -plus graduates of TRAINING. the Cleveland Institute of CIE pioneered the Electronics who are working first Electronics in high -paying positions with Laboratory CIE was recommended to me by my boss. aerospace, computer, It was appealing since I could study at my own pace at home and during business medical, automotive and travel." communications firms Dan Parks throughout the world. Marketing Manager/Consumer Products They'll tell you success Analog Devices, Inc. didn't come easy...but it did come...thanks to their CIE training. And today, a career in electronics offers more rewards than ever before.
Course " loved the flexibility CIE offered. It was the CIE'S COMMITTED TO only way I could continue both school and BEING THE BEST...IN ONE and the first my demanding job." AREA...ELECTRONICS. Microprocessor Britt A. Hanks Course. Today, no Director of Engineering CIE isn't another be- Petroleum Helicopters, Inc. everything-to-everyone other home study school. CIE teaches only school can match CIE's one subject and we believe state -of- the -art equipment we're the best at what we and training. And all your do. Also, CIE is accredited laboratory equipment, books
I want to get started. by the National Home Study and lessons are included in YES! me my CIE course catalog Council. And with more than your tuition. It's all yours to Send including details about the use while you study and for 1,000 graduates each year, Associate Degree Program. (For "I the way the school was set up with the -job after you liked we're the largest home study on- your convenience, CIE will have a laboratory assignments to enforce school specializing exclu- graduate. contact you - there conceptual learning. The thing which representative impressed me the most about CIE's sively in electronics. CIE has is no obligation.) PERSONALIZED Please Print Clearly curriculum is the way they show application been training career -minded AH59 for all the theory that is presented." students for nearly sixty TRAINING....TO MATCH Daniel N. Parkman YOUR BACKGROUND. Name Missile Electro-Mechanical Technician years and we're the best at Air Force our subject... While some of our students U.S Address ELECTRONICS... have a working knowledge of electronics others are just IT'S THE ONLY SUBJECT City WE TEACH! starting out. That's why CIE has developed twelve career State Zip Age CIE PROVIDES A courses and an A.A.S. LEARNING METHOD SO Degree program to choose Phone No. GOOD IT'S PATENTED. from. So, even if you're not Check box for G.I. Bill Benefits. Completing the course gave me the ability CIE's AUTO -PRO- sure which electronics career Veteran to efficiently troubleshoot modern GRAMMED® lessons are a is best for you, CIE can get Active Duty microprocessor based audio and video you started with core lessons systems and enjoy a sense of job security." proven learning method for Cleveland Institute of Electronics, Inc. Tony Reynolds building valuable electronics applicable to all areas in 1776 East 17th Street Service Manager/Technician Cleveland, OH 44114 Threshold Audio 6 Video for CIE's FREE Course Catalog and A School of Thousands. Send A Class of One. Since 1934. See How We Can Help Your Career Too! __J 15
www.americanradiohistory.comAmericanRadioHistory.Com NEW PRODUCTS
You can build your own robot the robot and a personal com- with the ADR -1 Robot Kit from puter. The on -board computer is Aclypse Corporation. The powered by a 16 -bit 8086 -com- finished robot stands 27 inches patible CPU with 256K of RAM. tall, measures 14 inches in di- Optional expansion cards can ameter, and weighs be connected to add memory, Robot Kit approximately 16 pounds. Its sensors, motors, and other new on -board computer system fea- devices. tures voice -recognition The ADR -1 Robot Kit costs capabilities, English speech $299. For further information, power motor drive, and contact Aclypse Corporation, output, The suggested list price for a battery with monitoring and Rt. 2 Box 213H, Worthington, IN the PCI local -bus version of recharge system. 47471; Tel: 812 -875-2852; BBS: VideoBlitz II is $589. The 2MB It take between two 812 -875 -2836. should VESA local -bus version, which and six hours to build the CIRCLE 105 ON FREE runs High Color (64K colors) at INFORMATION CARD 1024 x 768 pixels and True Color at 800 x 600 pixels, has a GRAPHICS suggested list price of $549. For ACCELERATOR more information, contact Gen- Designed for power users of oa Systems, 75 East Trimble graphic programs such as Win- Road, San Jose, CA 95131; Tel: dows, Windows NT, OS /2, and 408-432 -9090 or 800 -934 -3662;
AutoCAD, the VideoBlitz 11 Fax: 408 -434 -0997. graphics accelerator from CIRCLE 106 ON FREE Genoa Systems is available in INFORMATION CARD either PCI or VESA local -bus configurations. The PCI version is based on the Weitek P9100 POINT-TO-POINT RADIO/ GUI accelerator chip series and MODEM PAIR an IBM contemporary palette Intended to replace the RS-232 DAC. Equipped with 2MB cable between equipment, VRAM standard, the graphics Monicor Electronics' IC -15 point - board is upgradeable to 4MB to to -point radio modems create a meet the advanced require- wireless RS -232 "extension ments of Pentium -based PCI cord." The radio -modems each systems. contain an UHF radio trans- The VideoBlitz II can run at a ceiver, offered at either 4800 maximum resolution of bits per second or 2400 bps. 1600 x 1200 pixels (up to 64K The device's sensitive receiver, colors), and can deliver True powerful transmitter, and fast Color (16.8 million colors) PCI protocol confidently support graphics acceleration at line -of -sight distances up to one 1280 x 1024 resolution. mile. Greater distances are pos- "FlickerFree" technology pro- sible with optional gain vides refresh rates that exceed antennas. VESA specifications at all reso- Each radio has an intelligent lutions. RS -232 communications port The graphics accelerator in- that can be completely config- ADR -1 Robot. No special tools cludes high -performance drivers ured for any terminal. Data rates or electronics experience is for Windows, Windows NT, and are up to 19.200 baud. Once needed to build or use the OS /2 2.1 environments, as well configured, the radio-modem re- robot. as for Ventura, Lotus 1 -2 -3, Mi- places the cable. The ADR -1 Robot has its own crosoft Word, and WordPerfect. The IC -15 has applications in operating system, and a built -in In addition, the Turbo DLD driv- portable computers, industrial BASIC programming language ers from Panacea offer support scales, bar -code readers, and makes it easy to give the robot for AutoCAD, AutoShade, Auto - process -control equipment. instructions. It can be pro- Sketch, 3D- Studio, and other Each radio /modem comes with grammed by connecting it to AutoDesk programs. An easy- a short antenna, a rechargeable almost any computer or termi- to -use, menu -driven installation battery, and a battery charger. nal. Program and data files can program is executable from ei- The 2400 -bps and 4800 -bps IC -15 radio /modem pairs cost 16 be sent back and forth between ther DOS or Windows.
www.americanradiohistory.comAmericanRadioHistory.Com and intensifies as the gauss AIR-OPERATED DIGITAL level increases. DESOLDERING SYSTEM Dr. Gauss costs $49.95. For According to A.P.E., its EX-680 further information, contact The digital desoldering workstation Magnet Source, 607 South is the most compact, low -cost Gilbert, Castle Rock, CO 80104; digital desoldering workstation" Tel: 1- 800 -525 -3536. to meet MIL-SPEC require- CIRCLE 108 ON FREE ments. Designed for high- INFORMATION CARD volume production touch -up and repair, the EX -680 operates on in -house air -supply, filtered and MULTIMEDIA PC'S regulated from 60-90 psi. The desoldering handpiece allows $950 and $1400, respectively. Two additions to Canon's line of pneumatically powered station the user to work at safe temper- For more information, contact multimedia PC's, have been de- converts shop air into a high atures. A programmable Monicor Electronics Corpora- signed to support serious vacuum flow at 2.5 -3.0 cfm. security lock on the unit pre- tion, 2964 NW 60th Street, Ft. multimedia applications. The The EX -680 meets or exceeds vents unauthorized changes of Lauderdale, FL 33309; Tel: Innova Vision L50/340 and all applicable military and civil- settings for maximum and mini- 305 -979 -1907; Fax: L33/210 each offers a dual - ian EOS /ESD, temperature, and mum temperature limits, 305 -979 -2611. speed, 680 -MB CD -ROM drive, other safety standards. Fahrenheit or Centigrade, tim- CIRCLE 107 ON FREE a Sound Blaster 16 -bit stereo The EX -680's modular LED ing of heat control, and sensor INFORMATION CARD card, and an extensive software control panel constantly calibration. package. The L50/340 features monitors thermal loads to en- The EX -680 digital desolder- the Intel 486DX2/50 -MHz mi- sure safe removal of any solder ing system has a suggested list HAND -HELD croprocessor with a 340MB joints, even multi -layer PC price of $480. For more infor- GAUSSMETER hard drive. The L33/210 uses an boards. The desoldering station mation, contact Automated The Magnet Source's Dr. Gauss Intel 486SX/33 -MHz micro- features autotune temperature Producton Equipment Corpora- is an accurate, easy -to -use processor and a 210MB hard control and a temperature -offset tion (A.P.E.), 142 Peconic gaussmeter that measures elec- control that continually main- Avenue, Medford, NY 11763; tromagnetic fields (EMF's) tains tip and window Tel: 516 -654 -1197; Fax: produced by electrical currents temperature for precision con- 516 -289 -4735. in appliances, electronic equip- trol. The high -thermal -mass, CIRCLE 110 ON FREE INFORMATION CARD ment, and other AC power low-wattage, static -dissipative sources. Dr. Gauss can be used to locate and measure EMF's in and around the house, at school, in the workplace, and in other electrical- transmission areas. By slowly moving the 3M breadboards instrument away from an EMF- emitting device while measur- ing, it is easy to quickly for less dough. establish a safe distance from drive. Each system includes the electrical source and reduce 4MB of RAM (upgradeable to SoL *RUSA possible health hazards. 36MB), a graphics accelerator, BAGA1p0i VESA local -bus architecture, and 1MB of video RAM (up- gradeable to 2MB for faster playback and display perfor- mance). The multimedia computers also come with a fax modem, shielded stereo speak- ers, and a 14 -inch SVGA monitor. Pre -loaded software in- cludes MS -DOS 6.2, Windows 3.11, MicroFax, Microsoft Multi- media Works, Microsoft Encarta electronic encyclopedia, and two entertainment titles from Mi- crosoft: Cinemania and Golf. Estimated street prices for the Innova Vision Multimedia PC's Lower prices, plus jumper wires and a range from $1700 to $2050. For diskette. No wonder interest is rising. more information, contact Can- Dr. Gauss features two set- on Computer Systems, 2995 Remember, 3M Breadboards carry a lifetime warranty. tings to measure between 0.1 Redhill Avenue, Costa Mesa, For more information, call 1 (800) 328 -0016, ext. 103. and 10 milliGauss. Readings CA 92626; Tel: 800 -848 -4123; are on a needle display. shown Fax: 714 -438 -3317. An audio signal is emitted when CIRCLE 109 ON FREE O 3M 1994 NReliability an electrical field is detected INFORMATION CARD 17
CIRCLE 164 ON FREE INFORMATION CARD
www.americanradiohistory.comAmericanRadioHistory.Com load file? New Schematic CNTR6.SCH -2V +SV DATAREC.SCH DISPLAY.SCH D30Á 2 it 0108 PHASEO.SCH , BFR PHASEI.SCH D2812 ' U72A -C 4 MiliandMMEN AD96687 SHIF R154 fó SUHMOD.SCH TWIN > - $_io-4, (6133:2>- UART.SCH X UARTCONV.SCH Sin 7! UART_EON. SCH R162 RISE R161 64 Sin 2.2141 22Kn !
0118 r D11A r;. D2612 1 -5p2V -2V f1 2 EVENT COUNTER INr?>1 4.1 +6V m U _ R N r itafr- irn Uii3B ORCAD RD96687 ¡ ,y1,QIH113 U69B
U72B ! _i1®H1 26 2 t 4__. '.9 16_ -.- SCHEMATIC - 7_.. DS y7 v..?-3. D6 73 R166 DESIGN Sin D7 i -2V C TOOLS 386+ 74F 151'' CIRCLE 119 ON FREE INFORMATION CARD
More than a schematic -drawing package, its a fully loaded, expandable design environment for everything from design management to documentation.
Im definitely what most people kaboom!- a day or two of schematic and utilities, gives the user the impres-
would call a power user, I cut my adjustments or netlist edits become a sion of handling a design (not slews of first CAD teeth on various pack- memory unless you undelete them files), and provides some custom ages in the early eighties and today immediately. hands -on file- management suppert run a small but successful (read that Heck, just getting a program or its for times when you have good reason "in- the -black ") engineering-con- utilities to generate all that data can to interfere with all this automation. sultation firm that specializes in auto- be trying. Often times the user must The ESP design environment, which mated design work for customers that run more than one utility, tool, or pro- is shipped with all of OrCad's design demand fast turn around, Of course, cessing program to take human or tools, provides all those features and after all this time I've become a bit computer -generated input and gen- more. It is a graphical interface that is jaded and seldom come across soft- erate some useful output. Running operated by pressing on- screen but- ware that excites me, especially since such programs tends to be both time - tons and selecting options from I've done some interesting software consuming and often a little con- menus. The buttons are labeled with writing of my own. fusing. In the past, I've often asked text rather than so- called intuitive
However, I've recently had the myself questions like "Am I supposed icons so there's no guess work about
good fortune to take OrCad's Sche- to run the net lister before or after I what each one does. To ease opera- matic Design Tools 386+ for a spin, associate the schematics of a com- tion, all of the buttons in the environ-
and for once I must admit I'm floored. plex design ?" and "What's that utility's ment can be assigned hotkeys from
In it I have found the package I will name again ?" Besides, the program the screen on which it appears. Also, likely use for many, many years to should "know" the answers to those the same hotkey can be assigned to come. Let's discuss why I'm so im- questions and, with the exception of more than one button provided the pressed. mandatory user input (such as sche- buttons do not appear on the same matic entry), generate the necessary screen. ESP? They Read My Mind! files for you. The first screen of buttons allows you Organizing all the different files pro- Furthermore, dealing with all these to select a tool package, do some duced by a single CAD project (sche- files is not intuitive; we humans men- hands -on file management, config- matics, netlists, parts lists, report files, tally organize the data as a "design," ure ESP or exit to DOS. (For con- etc.), let alone those for a few projects, not a netlist here, a schematic there, venience, all but the last operation can be a daunting task. I've spent sev- etc. What CAD packages have lack- can optionally be performed from eral evenings (biting my nails and) re- ed is a more self -reliant user -friendly any screen of buttons.) tracing my steps through a minefield interface. One that generates sup- The tools you can launch from this of files begging to be cleaned up. port files on the fly, provides a con- screen include Schematic Design 18 Delete the wrong version of a file- sistent interface for its various tools Tools (the subject of this review), Digital
www.americanradiohistory.comAmericanRadioHistory.Com Haven't ays wan Simulation Tools, Programmable-Log - even modem them the data for weather ic Design Tools, and PCB Tools. All of quicker quotes and faster turn these separately available tool pack- around. Best of all, you wouldn't need ages need just ESP to run, so if you only a laser printer! require a schematic -entry package, you needn't buy the whole lot. The Template. As mentioned earlier, Speaking of the tools, there's a fea- ESP keeps track of which files belong ture of ESP that is not readily apparent to which design. It does that by segre- from its screens: seamless integration gating files into individual sub- directo- of the tools. For example, let's say ries, each of which bears the name of you're working on a logic schematic its design. There is also a special de- in Schematic Design Tools and now sign called the template that contains wish to run a simulation for the circuit. those files you would like copied to (or You just save the schematic while made part of) future designs. leaving the schematic editor and se- For example, let's say you've got an Weather Monitor II makes a state-of-the-art eat:her monitoring system affordable enougF for lect the Digital Simulation Tools but- idea for a nifty keyboard macro that ome use! ton. Provided you have purchased you'll probably want to use from now FEATURES INCLUDE: the simulation tools, the program will on. First switch ESP to work on the tern - Inside & Inside Instant Metric automatically process the schematic plate design, then perform the steps Outside Temps Humidity Conversions Wind Wind Chill Outside Hum. file to produce all the files needed for needed to enter the macro. From Speed & Direction Alarms & Dew Point the simulator software; no utilities, exits now on, whenever you create a de- Barometer Highs & Lows Option the Time & Date PC to DOS, or program commands are sign the macro becomes part of Rainfall Option erf-cel needed! new design. Order today: is not the same as Which points to another advantage Note that this 1- 800 -678 -3669 of the ESP environment: there are no having a default because it leaves old M -F 7 a.m. to 5:30 p.m. Pacific Time PE646I so- called "extra" options you'll have to designs (those created before the FAX 1-510 -670 -0589 M/C and VISA purchase to run any given tool to its template was changed) unaffected. One -year warranty 30 -day money -back guarantee fullest. If you've ever purchased a That prevents you from disturbing DAVIS INSTRUMENTS "bargain" CAD package only to find older designs with new, but less -than- 3465 Diablo Ave., Hayward, CA 94545 shortly afterward you absolutely must optimal changes in the operating en- CIRCLE 162 ON FREE INFORMATION CARD buy a so- called "extra" or two just to vironment. get some work done, you'll surely ap- Also, changes made (even to the preciate OrCad's bundling philoso- design environment) while working on Earn $1000 phy. It makes OrCad's software a a design only affect that design; they good value even over packages at do not affect the template or any A Week While You Learn High half the price, which tend to be pretty other design. So, after selecting a de- Paying VCR Repair. in incomplete not to mention lacking sign you could change every color Earn While You Learn . . . the tool integration provided by ESP the environment, select different de- Secrets Revealed . . . Unlike most CAD packages, all the vice drivers, tweak the operating pa- drivers available for a very large rameters of every tool, or whatever, Train at Home If you are able to number of monitors, printers, plotters, just to suit that one design without af- work with small photoplotters, etc. and all the utilities fecting any other design or the de- hand tools and pos- needed for seamless movement be- fault environment. If you do want sess average me- tween tools are all provided as part of changes in the template to be incor- chanical ability, you could earn top dol- ESPand therefore form part of your first porated into an older design, or you lar part time or full OrCad -tool purchase. The number of wish to copy changes between de- time. Our learn by doing method teaches you how drivers provided is incredible; I even signs, the program can accommo- to work on VCR's without boring unnecessary found one written specifically to han- date those requests as well. In fact, the electronic basics. dle the particular video -BIOS chip lo- design- management screen accom- For Free Information Package Send Coupon to: Institute, 6301 Equitable Road, cated on my display- adapter card, modates all such operations and Foley -Belsaw 99 Kansas City, MO 64120 ó let alone the adapter card itself. There more. tched` oalyl is even a utility provided to help you Check VCR o . Ba` or another VCR Repair, Dept. 62181 write custom video driver! The SDT Package. The same one - your own High Paying Computer Repair, Dept. 64082 Having all those drivers can also purchase philosophy applied to ESP is Career TV/Satellite/Satellite Dish, Dept. 31002 Fiefd translate into a substantial savings of evident in the completeness of the Advance VCR Repair, Dept. 65021 time and money. For example, let's say tool packages as well. For example, 0 Camcorder Repair, Dept. 66031 C BEL9RW you want to have a run of PC boards the Schematic Design Tools set comes Finn Fax Repair, Dept. 67031 made by a board house. Provided with 60 libraries that contain over Since 1926 Printer Repair, Dept. 68031 you've purchased the PC Board tools, 20,000 unique library parts. The ac- Name - is the drivers could generate the photo cent on "unique" because some Address plotter output needed by the board CAD packages promise libraries that City house, reducing their fee. You could "support" thousands of parts, but ac- 19 L state zip
CIRCLE 154 ON FREE INFORMATION CARD
www.americanradiohistory.comAmericanRadioHistory.Com tually provide much fewer parts and on those four buttons can also be de- held in a special sub -directory. count their synonyms as though they fined by the user to prompt his or her As a creature comfort, you are au- were different parts. For example, in memory. tomatically given the option to use some programs the LM741 and AD741 The Transfer group is also easy to the ASCII editor to view a report file (which are depicted the same) are explain. In this group are buttons for generated by the software if a tool derived from the same part data in a any of the other three tool sets you terminates abnormally. When you're library file, but the advertisement for might own and a "To Main" button finished with the report and exit the the program might count them as that takes you back to the main ESP editor, you're back in the tool set -no separate parts. screen. The tool -set buttons allow you jumping out to DOS, into your editor, The folks at OrCad have been to immediately move between the out to DOS, and back to the CAD equally generous with the supply of tool sets without going back to the package. schematic tools. The tools are so nu- main ESP screen. Of course, doing so The Library buttons are Edit Library, merous their buttons have been sep- causes ESP to automatically generate List Library, Compile Library, De- arated into related groups. The six the support files needed by the complie Library, and Archive Parts in groups are: Editors, Processors, Trans- chosen set of tools. Schematic. The Edit Library button fers, Libraries, Reporters, and User. Let's Three buttons comprise the Editors calls up an editor designed specifi- take each group in turn. group: Draft, Edit File, and View Refer- cally to handle library parts. That is The easiest group to explain is the ence Material. The Draft button quite a contrast from using software in User group. It consists of four buttons, places you in the schematic editor. which the same tool is used for both each of which can be configured to The Edit File button calls up a supplied generating parts and schematics, run any user -defined DOS -based pro- ASCII file editor or a user -defined one, and slighting either one function or gram. That saves you from exiting or if desired. The View Reference Materi- the other. Even so, if you have a rea- shelling to DOS to run a program from al button calls up that ASCII editor to son to do so, library parts can be gen- the command line and getting back permit you to view some software -re- erated by a text editor as well. The List to ESP when you're done. The labels lated text files (supplied by OrCad) Library button generates a file listirg all the parts in a given library. Compile TABLE 1 -DRAFT MENU OPTIONS Library lets you convert parts source
Main Menu Command Sub -Menu Commands files (in ASCII and written in a special language) into a library AGAIN (none) compressed file. Decomplie Library lets you sepa- BLOCK Move Get Export Drag Save ASCII Import rate parts in a library and convert Fixup Import Text Export them back into their source file form. CONDITIONS (none) Last, the Archive Parts button will DELETE Object Block Undo place all the parts from the current schematic in a library file all its own, so EDIT Edit Jump Find Zoom that future modifications of the stan- FIND (none) dard library files will not alter the ap- pearance of the (a GET (none) design great feature if you're always tampering HARDCOPY Destination Make Hardcopy File Mode Width of Paper with the appearance of library parts, and subsequently messing INQUIRE (none) up your old schematics). JUMP A -H tags X location The Reference Y location processor group (Annotate Schematic, Update Field LIBRARY Directory Browse Contents, Create Netlist, Create Hierarchical MACRO Capture Initialize Read Netlist, Delete List Write Back Annotate, Select Field View, and Cleanup is PLACE Wire Module Port Trace Name Schematic) Bus Power Vector powerful. Annotate Schematic as- Junction Sheet Stimulus signs parts- designation numbers (like Entry (Bus) Text NoConnect the "2" in U2) to all parts lacking one, Label Dashed Line Layout as well as labeling pin numbers in QUIT Enter Sheet Write to File Abandon Edits multi -element parts (such as the Leave Sheet Initialize Run User Commands gates in a quad IC), both of which Update File Suspend to System eliminate human error. Back Annotate REPEAT (none) allows you to switch old designations SET Auto Pan Macro Prompts X, Y Display with new ones as listed in a "Was/Is" file Backup File Orthogonal Grid Parameters Drag Buses Show Pins Repeat Parameters you create-great for updating sche- Error Bell Title Block Visible Lettering matics. Select Field View allows you to Left Button Worksheet size determine how much information is TAG A -H tags displayed for parts. Up to ten fields ZOOM Center Out can be displayed (say for one part 20 In Select they are the designation, value, toler-
www.americanradiohistory.comAmericanRadioHistory.Com ance, wattage, package styling, and TABLE 2 -EDIT LIBRARY MENU OPTIONS the catalog numbers of five dis- tributors) for each part, so this option Command Menu Commands lets you keep things neat and simple. AGAIN (none) Update field contents allows you to BODY Kind of Part? Block? Graphic? IEEE alter field information (excluding the BODY Line Circle Arc of parts based on an elaborate, but Text IEEE Symbol Fill easy to construct, search and replace Delete Erase Body procedure. Create Netlist generates BODY
www.americanradiohistory.comAmericanRadioHistory.Com ANTIQUE RADIO
By Marc Ellis his month, we're going GENERAL right) are for tone, manual to take a look at the DESCRIPTION tuning, and volume /power. Bush "22 Series," a radio The 22 Series is a four - Note that if this were an that was called to our at- tube -plus rectifier design. American set, the positions tention by Paul Coxwell We'd call it a "five- tuber," of the tone and volume/ (Sutton -on -Sea, England). but Paul tells us that the power controls would prob- Besides being a reader of British would call it a "four- ably be reversed.
A Baby Antique Radio, Paul is him- valve" set. Except for the The American logic, I sup- self a contributor to tuning and power -supply pose, is that the controls Boomer From Popular Electronics. Many circuits (to be discussed), should be arranged, in will remember his article on the radio is of conventional order of use, from left to Britain vacuum tubes in the Oc- design. It seems to differ right-the way our eyes tober, 1993 issue. little from the circuit used in scan while reading. The Brit- The Bush is the first non - the typical "All- American ish logic is perhaps that the American radio to be dis- Ave" AC -DC radios pro- knob that's needed first cussed in this column. As a duced here in great should be on the right, quantifies during the 1940's where it can be most easily and '50's. grasped by a right -handed However, while some of person. our "All-American Five" sets Between the dial scales sported a shortwave band, and the knobs is a row of most received broadcast eight pushbuttons (or only. The Bush set, in con- "press- buttons," as they are trast, has three bands- referred to on the service listed on the service sheet sheet). Three are used for as 16-50 meters (6 to a bit bandswitching; three more under 19 MHz); 187 -578 are used to select preset meters (about 520-1650 stations in the broadcast kHz) and 882-2000 meters band; one selects a preset (about 150-340 kHz). Note station in the longwave that I've listed the frequen- band; and the final button cies (in MHz and kHz) in switches between the radio reverse order from their and a phono (or "gram - equivalent wavelengths (in ophone') pickup, if one is The Bush 22 Series boasts pushbutton tuning, and an imposing meters). connected to the terminals three -scale dial. The first band is a "short- on the radios rear apron. wave" range such as might On an equivalent Ameri- radio from the "early baby - be found on many Ameri- can set, bandswitching boomer" era (it was man- can sets of the era. The would most likely be han- ufactured in about 1950), it second is standard broad- dled by a rotary switch, also represents a time cast. The third is a longwave controlled by an additional period we have rarely, if broadcast band used in front -panel knob, and there ever, covered in the past. Britain and Europe. would be more pushbut-
I believe you will find the Looking at Paul's photo of tons devoted to station design of this receiver inter- the Bush, you'll see that the selection. However Paul tells esting in both its similarities front panel is dominated by us that only three domestic to, and its differences from, the tuning dial, which con- broadcast stations ("Home," American design practice tains "thermometer-type" "Light," and "Third ") were of the time. And thanks to scales for the three tuning offered by the BBC in 1950. the nice photo, helpful let- ranges [from left to right: By the way, the glass dial, ter, and comprehensive shortwave, medium wave says Paul, is easily remova- service notes supplied by (broadcast), and long - ble to access the preset Paul, we're in a position to wave]. The three knobs tuning adjustments and in- make a detailed study of along the bottom of the stall the supplied labels for 22 our visitor from overseas. control panel(from left to the pushbuttons.
www.americanradiohistory.comAmericanRadioHistory.Com Dimensions of the Bush Note that even in trans- (Wx Hx D) are 23x former configuration, when 161 x 10 inches. Its original a full -wave rectifier tube 1950 list price (23 pounds, 8 would normally be used, shillings and 9 pence) was the tube at V5 (a UY41) is a equivalent -at that time - half -wave device appropri- to about $100 American. ate for use in an AC -DC Interestingly enough, one mode. Also note that the could buy either a trans- heaters of V1 V5 are con- former- powered or AC -DC nected in a series string, as is required for AC -DC oper- version of the set for the + [`ú same price. r,C`r ation, even when being Paul's Bush was in almost operated off the trans- continuous daily use for the former. Those features first 25 years of its life, re- facilitate switching between quiring only occasional the two types of operation service or maintenance. with a minimum of rewiring. Another feature of the CIRCUIT FEATURES transformer circuit, also ap- A look at the schematic parently intended to shows that, except for the facilitate conversion be- 'front -end" network of coils, tween the two modes with capacitors, and switches a minimum of rewiring, is used for bandswitching, that there is but a single tuning, and station presets, secondary winding. The the circuit is a fairly simple winding is tapped, as re- one. After being tuned in quired to provide filament, the front end via either a plate, and dial -light volt- pushbutton preset or main ages. Normally, those tuning capacitor C47/C48, voltages would be supplied the signal from the antenna by individual transformer (either an external one con- secondary windings. nected to terminal Al or A2 or the internal loop L2) en- RF AND OSCILLATOR ters tube V1. This is a UCH42 TUNING triode - hexode similar to our Here's a brief run -down type 12K8; it serves as an on the major tuned circuits rtin 19, oscillator-mixer, otherwise ;_ -- in the Bush's front end. The known as a converter. (In signal from the antenna is British parlance, it's a "fre- tuned manually by capaci- quency changer. ") tor C47 and coils L5 Tube V1 converts all in- (shortwave), L6 (medium .11-- Y coming signals to a wave), or L7 (longwave). standard "intermediate fre- The desired coil is selected e quency" of 465 kHz (the by its matching pushbutton standard IF used in most switch (S1, S2, or S3, respec- American sets is 455 kHz). tively). The sections of those The converted signal then switches bear letter suffixes passes through IF amplifier indicating whether they are u tube V2, a UF41 variable-m, ö 1 n closed (a, b, c, or d) or pentode. From there, the aßî open (x or y) when the audio is detected and am- The Bush's schematic is relatively simple and straightforward, button is pressed. Of plified in tube V3, a UBC41 except for elaborate pushbutton tuning circuits and a somewhat course, the reverse action duo -diode triode similar to unusual power supply (see text). takes place when the but- our 12SQ7. Volume control ton is released. R12 (on which is mounted will be found in V4's plate lion. The set could be For automatic station se- on -off switches S9 and S10) circuit. purchased in either config- lection on the broadcast is in the cathode circuit of The Bush's power -supply uration from the band, L6 is tuned by preset V3. The audio is further am- circuit is a bit unusual in that manufacturer and later capacitors C43, C44, or plified to speaker volume it is designed to be easily field -converted from one C45, selected by their by tube V4, a UL41 power convertible between AC- mode to the other through matching switches S4, S5, or pentode. Tone control R24 DC and transformer opera- the use of a parts kit. (Continued on page 86) 23
www.americanradiohistory.comAmericanRadioHistory.Com THINK TANK
By John J. Yacono ast month I asked edu- month's letters deal with RC are, that's a good thing.) cators and hobbyist (remote -control) and Second, while the force of
groups what I could do with model -railroad endeavors. gravity always pulls objects this column to make it more together, electrostatic force of an educational tool for TUTORIAL 1 can cause objects to be
them. (Perhaps I could pres- Beginners might be won- attracted together or re- ent a contest between dering what they'll need to pelled apart. We explain classes and /or hobbyist know to understand this first that by saying that charges
groups, or maybe I could tutorial. Well, you need to come in "positive" and present the work of a group understand that the world Is "negative" varieties. Like each month or so.) While made up of very small charges repel each other, Some Hobby I'm waiting for their input, pieces of matter called while particles of opposite I've decided to present atoms. If that concept is charge attract. For example Circuits some tutorials aimed at the new to you, you can look negative charges repel complete beginner in elec- up more Information about one another, and positive tronics. That way, any atoms in your local or charges repel one another, beginners reading the col- school library, or ask a but negative charges are umn will be brought up to teacher or knowledgeable attracted to positive speed enough to partici- friend about them. charges, and vice versa. pate in the columns to For our purposes, you'll Electrons tend to orbit nu- come. need to understand that clei (which is plural for atoms have Iwo important "nucleus') because elec- o POWER +5V structures: a "nucleus" and trons have a negative CONTROL i R1 a bunch of "electrons." The charge and nuclei have W 10K R4 8 nucleus is a lump of matter positive charge; remember, I 820L V+ R3 that, in most circumstances, when it comes to elec- 1K isn't too mobile. Electrons trostatic force, opposites TR DIS Q1 on the other hand are very attract. U1 2N3O4 68K LM555 busy little particles that, un- I figure that's enough for 6 R2 THR less freed by some external a beginner to digest for OUT 1K force, will orbit the nucleus one tutorial. Next month, I'll GND at high speed. describe how we use the GND You might be wondering electrostatic force to move Cl what keeps active particles electrons around. For now like electrons In orbit. Well, left get to those hobbyist much like the planets are letters. Fig. 1. This servo driver is great for testing suspect servos, or as held In orbit by an invisible a project interface. With the component values shown, the circuit force of attraction (gravity) SERVO DRIVER can drive a servo through a 90- degree rotation. due to their mass, electrons A few months ago I saw are held in orbit by the the schematic diagram of Experienced hobbyists "electrostatic" force due to a servo- driver circuit in a might wish to read along a property called "charge." hobby magazine. My circuit just to refresh their knowl- In other words, while ob- (shown in Fig. 1) requires edge, but I'll tell you now jects with mass feel a force fewer parts than the origi- that the first couple of col- of attraction called gravity, nal, yet performs the same umns will be pretty particles with charge feel function. rudimentary. Still and all, an electrostatic force. A servo's position de- they should take consola- There are two key dif- pends on the pulse width of tion in the reader's letters if ferences between the control signal it re- they find the tutorial not to gravitational force and ceives. The control signal is their liking. electrostatic force. First of a high pulse that is one After this month's tutorial, all, the electrostatic force is millisecond wide plus or I'll present circuits that read- much greater than the minus 0.5 ms. The overall ers have built to suit their force of gravity. (Consider- period of the signal can 24 particular hobbies. This ing how active electrons vary.
www.americanradiohistory.comAmericanRadioHistory.Com To produce such pulses, I TA took advantage of the 555 STEERING timer's ability to have a vari- B able duty cycle. The overall FORWARD/ JT1 in will vary period my circuit REVERSE 1t T2 D1 D2 some, but as I said, that 144001 1 1N4001 does not matter. For proper RECEIVER polarity, 91 inverts the sig- nal leaving the timer. With *--I--- .-{ D5 D6 potentiometer R2 centered, 1N4001 1N4001 the servo will be close to ---- N centered. The value of R3 Cl C2 can be changed to accu- .1 .1 rately center the servo. o When R2 is moved, the cir- o o cuit's duty cycle will change I o and the servo will move proportionally. The values shown will rotate the servo K1 K3 K4 6V through 90 degrees (the 5V 5V 5V 5V standard rotation for a hob- by servo). To get 180 degrees of rotation, the val- ues of R1, R3, and C2 MOT2 ( MOT MOTI should be changed to 5,600 ohms, 560 ohms, and
2 µE respectively. Fig. 2. You can add relays to some inexpensive RC receivers to operate your own chassis. -Brad Tompkins, Bessemer, AL Remember folks, elec- Pied so that its contacts trolytics have a wide were replaced by transistors tolerance, and vary with controlled by my home- temperature. The trick here made computer interface. is to use a monolithic ca- All the motors that I use hello, max... pacitor for Cl, You might are DC, which makes for- also want to use a trimmer ward and reverse easier. potentiometer for R3 Oust Most of the circuits that I've like a manufactured unit seen in hobby magazines would have) to account for use a dual -voltage supply variances in servo motors, (i.e., ± 12 volts) to get for- ward and reverse. However, RECEIVER /MOTOR my circuit (see Fig. 2) uses INTERFACE two SPDT relays to switch We would like to introduce you to I like to motorize things for the polarity of the voltage -100A Frequency Counter, computer control from toys supplied to each motor in the Max to home -made projects. my home -brew drive sys- because great things really do Unfortunately, as my proj- tem. As you can see, that come in small packages. ects got more complicated, requires the use of some so did the wiring between diodes to control the relays Full 8 -digit display covers 100 MHz range my home -made computer as the polarity is switched. Completely automatic -no front panel controls is 0 interface and the projects. When at rest, there a Extra large .43" display
I'll describe how I over- voltage at all receiver ter- Battery or AC powered came that with the receiver minals (marked T1, T2, TA, Automatic decimal point Input overvoltage protection and transmitter for a cheap and Te). When forward mo- Automatic overflow indication is T1 R/C that I bought at a tion desired, goes car Automatic low battery indicator c T2 is yard sale. positive and grounded. 1 Hz resolution to 10CI MHz K1 To start, I stripped out the That energizes through receiver and transmitter. D1 while diode D2 (which is GLOBAL The transmitter (which is not reverse biased) prevents K2 SPECIALTIES (800) 572 -1028 an the point of this letter, and from activating. So current 70 Fulton Terrace, New Haven, CT 06512 you might want to leave flows through K1 to MOTI to (203) 466 -6103 Fax: (203) 468 -0060 company intact anyway) was modi- K3 and back through K2 to CIRCLE 13 ON FREE INFORMATION CARO 25
www.americanradiohistory.comAmericanRadioHistory.Com ground. Current also flows 12V through the gaps between a 14 from K1 to K4 to MOT2 and 12 cars as they pass over the R1 .0.)) 11 through K2 to ground. 9 phototransistors. The - 1K 13 light U1-c When reverse is used, Ti R3 emitting diodes are con- CD4093 Ut-d 4700 and 12 reverse polarity; Ti CD4093 nected so that they goes to ground and 12 goes operate alternately, de- positive. That energizes K2 pending on the outputs' of Cl R2 through D2, D1 keeps ED1 U1 -d U1 -b. and 6.8 100K and K1 off. When K2 is ener- Basically, R6 is adjusted so gized, current flows through t ambient room -light striking K2 to MOT2, from MOT2 to Q1 (and any other pho- K1, R4 K4, from K4 to and from 5 totransistors connected in 100K 1 R5 there to ground. Current series) keeps the output of --1M- 3 4.7K 6! also flows from K2 to K3, Ws, U1 -a at pin 3 low. When a D1 7 Ui-b from K3 to MOTI, from MOTI U1 -a 1N4148 CD4093 car passes over the pho- CD4093 to K1, and then to ground. totransistor, which is When steering is used TA R6 installed between ties in the Q1 100K and TB work the some as T1 C2 track, pin 3 goes high, al- TIL414 and T2. When relays K3 or .001 lowing a high to be placed K4 are energized, they on pins 6 and 13. That al- open the circuit that is ei- lows the high output of U1 -c ther powering their motor Fig. 3. This model- railroad crossing -light driver turned out to be at pin 10 to enable pin 12, or grounding it. That will the answer to a reader's request, provided he can find small which in turn allows pin 11 stop either motor, depend- LED's to fit his model's scale. to go low. That makes a ing on which relay is complete path for LED2 to energized. operate. When pin 10 goes +9v The reason I didn't run a low, pin 11 goes high. That common ground circuit is TRACK makes pin 5 high and, thus, SIGNAL that there was a 2 -volt dif- enables pin 4 to go low ference between the signal and completes the circuit ground and actual ground. for LEDI. That alternates the
I hope that I've been able LED's, which are installed in to explain this circuitry. Keep 112VDC a railroad- crossing signal. up the good work on the The fact that only two
column. I hope to see more wires are necessary to op-
helpful ideas that I can use. erate the flashers is an -Murray Halbert, added advantage not only Ontario, Canada for looks but also for con- S1 Murray also indicated in REED struction of the crossbucks
his letter that D5-D8 and SWITCH themselves. I have cas- IN TRACK C1 -C4 are used for tran- caded as many as six sient suppression. He also RED -LAMP ON TIME (SECONDS) phototransistors with no
notes that MOT1 and MOT2 R1 (KILOHMS) Cl = 10µF Cl = 10011F problems. I have also driven
were taken from an old 8- 100 2 16 four LED's from the CD4093
track tape deck. I really without I 220 3 32 any problems. didn't know those motors hope this circuit is interest- 470 6 70 had the horsepower re- ing enough for a book! 1000 15 175 quired to move a chassis. I Thanks. always assumed they were Fig. 4. A track control signal, like the one shown here, lets the -Brian F IGng, Groton, CT low -power units with a engineer know when a train has passed a certain point on the It certainly warrants a flywheel that kept them track. book. By the way, I'd like to spinning, Using them this hear more from model -rail- way is a neat idea! model -railroad crossing. mined by C1 and R1. Gates road hobbyists. Surely there The unique features of this U1 -b and U1 -d are set up as are plenty of home -made RAILROAD -CROSSING circuit (see Fig. 3) are its an RS flip -flop that is gated railroad add -ons out there FLASHER simplicity, minimal use of on by U1 -a. Gate U1 -a in (variable -speed controllers I've been reading this parts, and full usage of the conjunction with Q1 oper- and marquee displays column for a pretty long gates in the IC. ates as the control gate for come immediately to mind)
time now and figured I Its operation is pretty the flip -flop. Components that we could cover here.
could use a free book. I straightforward: Gate U1 -c is D1, C2, and R5 act as a This next gentleman feels have enclosed a circuit to set up as an oscillator delay circuit to compen- that way, too. 26 operate flashing lights for a whose frequently is deter- sate for any light getting (Continued on page 78)
www.americanradiohistory.comAmericanRadioHistory.Com BUILD TOUR OWN ROBOT BUILDER'S TV REPAIR TEST EQUIPMENT BONANZA vos BEGINNERS 99 INEXPENSIVE rOuaie eutrtod ROBOTICS PROJECTS Select any 5 books for A 95 (values up to 2800P $17.96 2627P 619.95 only $143.75)
REPAIR ILLWSTRATED Book Club® MOWSWOWS when you join the Electronics
A Complete Reference for Prord Builders
exosiww
417941 628.95 4331H -XX- $29.96mm 3671P $18.95 Hardcover Counts as 2/Hardcover
Troubleshooting á Repairing
3279P 526.95 4244P 69.95 3777H $32.95 Hardcover
TROUBLESHOOTING AND REPAIRING MASTER AUDIO & VIDEO CASSETTE PLAYERS & RECORDERS
ICN11:11111 /Iv
360014 -XX $34.95 4360H -X7. $34.95 3802H-XXX 684.95 373OP 522.96 3795P 919.95 3711P $19.95 325SP $19.95 Courts as 2Merdcover Counts as : /Hardcover Counts as 3/Hardcover BEGINNER'S aaaarnr.E* ( GUIDE TO \ti Gr,nlniu Incredible READING CIRCUÍ! SCHEMATICS ENCYCLOPEDIA Audio AND SECOND EDITION Video TROUBLESHOOTINC
Projects GUIDE, Volume 1 You Can Oasis Build Electronics Course .10e ,nr w.
4261H401 636.00 4325H -XX $39.95 0487375P $24.95 3632P 510.95 037602614XX $39.50 139P S16.9' 2613P $19.95 Counts as 2/Hardcover Counts as 2/Hardcover Counts as 2/Hardcover Trouble3ltooling As a member of and REpaiiring the Electronics Book Club ... AUDIO ... you'll enoy receiving Clu 3 tulletins every 3 -4 weeks EQUIPMENT containing exiting offers on the latest books in the field at Ln4v, savings of up to 50% off of regular publishers' prices. If you How to Read want the Main Selection do nothig and it will be shipped Electronic Circuit - all Diagrams automatically If you wart anol he book, or no book at simply return he reply form to us bi the date specified. You'll have at least 10 days to decice. And you'll be eligible for 2880P $15.96 408117 $9.95 4122H -XX $36.95 Counts as 2/Hardcover FREE BOOKS through t Bows Book Program.Your only obligation is to purchase 3 more books curing the next 12 l'Id. ó15\1 LiiIIF McGRAW-HILL months, after which you may 2.ancel your membership at ELE('l'RONICS ELECTRONICS any time. A shippirg/ttendllne charge and sales tax will boo added to all orders. M books are
DICTIONARY soficover unless otbsoiree noted. ('ubhshers' ices shown r It you select a book that counts as 2 choices writs the book lumber it ow box and XX in the next. Ural select a book that counts el 3c-idioms one the boos number in one box and MC in the next. 051994 Electronics Boot Club PE1094 It card is missing, wile b Electrones Book Out. Blue Ridge Summit, PA 17294-0810 Vow most complete and for 0404348H -XX $49.50 comprehensive source 4209P 4227P 615.95 1367P $29.95 $19..25 Counts as 2/Hardcover the finest electronics books. 29
www.americanradiohistory.comAmericanRadioHistory.Com The Four -Year Electronics Degree Program That Really Hits Home! Bring The Technology Home With A Bachelor Of Electronics Engineering Degree. No Hassles. No High Cost!
World College gives you the skills, Four Powerful Reasons the knowledge, the power to take To Connect With advantage of your best opportunity in . World College Today: electronics. And you can do it all at Earn your four -year your own pace! degree! Without leaving home. Self -paced World College continually works 2 training!
it to provide its students with the most Independent study in Nows the time to prepare for a profitable career advanced education tools. From the 3 your home! latest equipment and reference books We've lowered the cost of Expert to breakthrough computer -simulated 4 instruction! higher education. experiments, students are exposed to It's true! You can earn a four -year the latest technological advancements. Bachelor of Electronics Engineering r All the equipment, parts, and soft- Technology degree today ... and ware you need are included in your Give Me The prepare yourself for a high -paying affordable tuition, including more than Power! ... electronics career without quitting 300 hands -on lab experiments you Send me a FREE your job or ever leaving your home. can complete in your home. World College course Because World College, an affiliate of catalog today! the Cleveland Institute of Electronics, Choose your own pace. offers you the total flexibility of indepen- Earn your bachelor's degree (Please Print Neatly) dent study programs proven effective for on your time - and at your pace - people like you who truly want to suc- because you pay tuition to World Name College only as you complete the ceed! World College independent study Address lessons help you build valuable skills upper -level semesters close to graduation. The faster you make it City through, the less you pay. So you State, Zip Mail /Fax Today have an incentive to make your future or Call happen quickly - yet the freedom Phone ( to choose your own pace! 1- 800 -696-7532 Age Send today for your FREE For faster service, call course catalog -- and give yourself that 1- 800 -696 -7532, step -by -step, and expert instructors are future you've always wanted - or call personally available to you with a toll -free with an electronics degree education 1- 804 -464 -4600. call. What a way to earn an education! from World College. Or fax this coupon to 1- 804 -464 -3687. A world of opportunity. Where is your career headed? With a four -year bachelor's degree
from World College, you call the shots, 1StC O L L E G E choosing from incredible, high -paying Lake Shores Plaza Drive, 113 opportunities in electronics, tele- 5193 Suite --- Virginia Beach. VA 23455 -2500 communications, computer, electrical pc, power, and many other growing fields. saw iiii: Affiliated with Cleveland Institute of Electronics WAH13 Take charge of your future in electronics. L J
www.americanradiohistory.comAmericanRadioHistory.Com Build A Home Security System
Put this full featured, commercial- quality burglar- alarm system to work protecting your family and property.
BY JOHN TAYLOR, JR.
-open With home burglaries and expand the basic system to provide one in which several normally other crimes against un- additional protection. sensor switches are wired in parallel. suspecting homeowners Violating the protected area causes a on the rise, home -security systems How It Works. The Home -Security switch to close, feeding a signal cur- have become an increasingly popu- System in its most basic form features rent to the monitoring circuit, indicat- lar means of protection. Security sys- eight individual protection zones, ad- ing that the protected zone has been tems are available in varying degrees justable entry and exit delays, a panic breached. of complexity ranging from those with switch (for emergency situations), au- Open -loop systems have the ad- simple single -loop protection to those tomatic system- reset, support for an vantage of drawing no current in the with an impressive list of convenient auto -dialer (which, in case of emer- idle state, while closed -loop systems features, like multiple -zone protec- gency, dials pre -programmed tele- circulate some small loop current at tion, adjustable entry and exit delays, phone numbers), ifs X -10 compatible idle. Closed -loop systems are easier a panic switch, system- status annun- (allowing it to control house lights and to wire than their open -loop counter- ciators, auto system- reset, support for appliances), has a backup battery (to parts and they are less easily defeat- an emergency auto -dialer, X -10 com- keep the system on -line during a ed since cutting a wire in a closed - patibility, and battery- backup opera- power failure), and there is also an loop system is tantamount to opening tion. As one would expect, the cost of optional zone -status panel that is a sensor switch. such an elaborate system can range used to individually show the con- The system's entry delay allows ade- anywhere from several hundred dol- dition of each protection zone. quate time for one to enter the prem- lars to several thousand dollars. Most modern security systems are ises and disarm the system (via the However, you can have all of those designed for either open- or closed - keypad or an optional key switch) be- features at a fraction of the cost by loop operation. A closed -loop system fore the system registers a legitimate Sim- building the microprocessor-con - is a system in which one or more nor- breach and puts out an alarm. trolled, Home -Security System de- mally- closed sensor switches are ilarly, the exit delay allows sufficient scribed in this article. We'll show you wired in series. Opening a single time to exit the premises after the sys- how to build the main control unit of switch in the series disrupts loop cur- tem has been activated. our Home -Security System in its stan- rent, thereby signaling to the monitor- The system described here is an dard configuration; optional compo- ing circuitry that a breach has eight -zone, closed -loop system; an nents can be added at any time to occurred. The open -loop system is unlimited number of switches (per-
www.americanradiohistory.comAmericanRadioHistory.Com lively, on the two -digit LED readout. The delays can be varied by pressing the appropriate delay switch while si- multaneously holding down either the adjust+ or adjust- switch (see "Pro- gramming Entry and Exit Delays "), The reset switch, which is used to reset the system during a violation, is also used to cancel the panic mode, and to clear flashing zone LED's on the optional zone -status panel. The test switch is used to test the internal and external sirens and the LED's on the optional zone -status panel. Pressing the adjust + and adjust- switches si- multaneously toggles the button -click mode on and off; when on, each switch press is confirmed by a click on Fig. 1. Six normally -open momentary pushbutton switches (S2 -S7) are mounted to the a piezoelectric buzzer (contained front panel of the main- control unit's enclosure, and are then connected to terminals J2 -2 through J2 -8 on the printed- circuit board. within the main -control unit). Button - click mode is also enabled by default haps covering several windows) can system. The panic mode, normally ac- on power -up. be wired in series for each protection tivated in an emergency situation The RESET switch is the only panel - zone. Any one zone can be easily by- such as when a burglar is believed to mounted switch that is operational passed with a simple flip of its corre- be on the premises, can be invoked during an alarm condition; the other sponding bypass switch, thereby either from the keypad or from any five switches are disabled during that allowing you to disable one or more remotely located panic switch (if period. If the system is not in an alarm zones, while maintaining coverage used). Pressing the reset switch on the state, pressing the reset switch dis- for the rest. main -control unit or entering your plays the number of times the system
ZONE 1 is an entry -delay zone; a four -digit code on the digital keypad was violated during the most recent breach in the entry-delay zone (such cancels the panic mode. armed period. If the system is violated as when the homeowner returns and There are six panel- mounted push- multiple times before being dis- enters the premises) while the system button switches on the main -control armed, all violated zones are indicat- is armed sounds a warning buzzer at unit (see Fig. 1) that provide control ed by flashing LED's on the zone -status the keypad and starts the entry -delay over the entry and exit delays, ad- panel. timer. If the timer expires before the just+ and adjust -, reset, and test Both of the sirens and the zone -stc- homeowner reaches and disarms the functions. Pressing the entry delay tus panel LED's can be manually test- system, the system sounds its sirens. and exit delay switches displays the ed by holding down the TEs' switch for Likewise, activating the system (as in current entry and exit delays, respec- at least three seconds. If the switch is when leaving the premises) sounds a warning buzzer and initiates the exit - delay timer (when the delay time ex- pires, the system arms itself). If, at the end of the delay period, one or more zone loops are open, the system puts o out an alarm. If, on the other hand, all zones are secure, a confirmation o chirp sounds on the external siren and on a buzzer in the keypad, indicating that the system is fully armed. In addi- tion, a buzzer at the keypad also serves as an audible annunciator to indicate an open in any loop, except for zone 8, by sounding a short beep. a Zone 8 is considered the silent zone o o and does not cause the keypad buzz- O ARMED er to beep. That input is ideal for use SYSTEM o BATTERY with motion detectors since those de- vices are likely to be triggered offen. The system's panic feature allows Fig. 2. The optional zone -status panel is used to provide graphic security- system- the alarm to be instantly set off at any status information via a floor plan of the protected area, with each area indicated by 32 time, regardless of the status of the an LED.
www.americanradiohistory.comAmericanRadioHistory.Com released before three -seconds ex- devices. A variety of suitable sirens are delay, hold down the appropriate de- pires, the test mode will not be initi- available from Radio Shack for under lay switch while pressing the adjust+ ated. In addition, during tests, the $20 (see Parts List). The external siren or adjust- switch until the desired de- zone -status panel flashes on and off output, in addition to its alarm duties, is lay setting in seconds appears. to reveal any defective zone LED's. To also used to confirm that the system In the event of a complete power cancel the test mode, simply release has been successfully armed. failure, the entry and exit delays revert the îsî switch. An emergency auto -dialer can also back to their default values. Entering The keypad (available from Radio be connected to the system for addi- the proper code at the keypad(s) also Shack;, whose main function is to arm tional protection. The auto -dialer out- causes them to reset to their default or disarm the system (via a program- put provides a dry- contact closure so settings. mable security code) can also be that whenever an alarm is triggered, used to invoke the panic mode; press- the auto -dialer calls up to three pre- Circuitry. A schematic diagram of ing the * and # keys simultaneously programmed telephone numbers. A the main -control unit is shown in Fig. 3. causes the sirens to immediately compatible auto -dialer is available At the heart of the unit is U16, Zilog's Z8 sound regardless of whether or not from Radio Shack (see Parts List). It's an 8 -bit microcontroller, which receives the system is armed. The keypad as- attractive alternative to the costly its program instruction from U17, a sembly also contains two built-in LED's monthly monitoring service offered by 27C64 8K x 8 EPROM. Integrated cir- (red and green) that are used to indi- security companies. cuit U15 (a 74HCT373 8 -bit latch) is cate the system arming and loop sta- A serial output on the main -control used to demultiplex the address /data tus. unit allows it to communicate with an bus of the Z8. Addresses on the ad- A red LED (arm) lights whenever the X -10 computer interfaco a popular dress /data bus for all external pro- system is activated (during the delay device that is designed send control gram memory transfers are clocked period), and flashes (after the delay) signals to appliance and lighting or the falling edge of the address to Indicate that the system is fully modules via household wiring. By link- strobe M. The strobe signal is inve i ed armed. The green LED (loop) turns on ing the main -control unit with an X -10 by U13, Y6 of a 74HCT00 hex invei fer, when one or more of the enabled interface, the main -control unit can and used to clock U15. zone inputs is open. The keypad also access household lighting indirectly. Integrated circuit U14 (a 74HCT138 contains a tamper switch that in- The interface allows the main -control 3 - "o -8 line decoder) generates chip stantly triggers the panic feature if the unit to turn on lights in the delayed - select signals for: U17 when reading keypad is tampered with. For max- entry zone when the area is violated operating- system code; U11 when imum flexibility and convenience, the (that's a welcome convenience to the writing the zone -status panel LED's; U7 system can support up to four key- homeowner when he returns after and U10 when writing the two 7 -seg- pads. If desired, the keypad can be dark and attempts to enter the disarm ment LED displays; U8 when writing replaced (or augmented) by a me- code before an alarm is triggered). the system alarm outputs; and U5 chanical key switch. When a protected area is violated, when reading panic switch and arm- The optional zone- status panel (see and the disarm code is not entered in status inputs. The inputs to U14 consist Fig. 2) is used to provide security-sys- time, the main -control unit feeds a sig- of the upper three address lines, A13 tem- status information. As shown, a nal to the interface, causing all X-10 - through A15. floor plan of the protected area is controlled lights to flash on and off, The MAX705 microprocessor super- used as a graphic representation of indicating an intrusion. That feature visory circuit (U18) holds the micro- the prctected areas, with each area complements the external siren in processor in the reset state during indicated by an LED. A lighted LED alerting neighbors of an intrusion. power -up and prevents code execu- indicates an open (unsecured) zone. The system's rechargeable backup tion- errors during power -down or A flashing LED on the panel signifies battery (if installed) is constantly trick- brownouts. On power -up, once the that its respective area has been vio- le- charged while AC power is applied supply voltage exceeds the reset lated. The system -armed LED on the to the system. But should AC power go threshold (4.65 volts), an internal timer zone -status panel serves the same down, the backup battery kicks in to releases U16's tirSrî line after about 200 purpose as the red arm LED on the supply power to the system; the bat- ms. That guarantees that the pro- keypad; a steadily lit LED indicates tery can provide up to 12 hours of cessor starts in a known state once the that the system is about to be armed, operation in the idle state, or up to 1 power supply stabilizes, and also en- and a clashing LED represents a fully hour during a fully- alarmed condition. sures that U16 stops executing code if armed system. Of course, the zone - During battery operation, an indica- the supply voltage falls below 4.65 stctus panel can be omitted without tor on the zone -status panel lights, sig- volts; for instance, if the battery runs adversely affecting the operation of nifying that the system is operating low during a power outage. the system, or it can be replaced by a from its alternate source. Integrated circuit U18 also functions series of LED's mounted on the front The system's default entry delay (20 as a watchdog timer, monitoring the panel of the main -control unit's en- seconds) and the default exit delay microprocessor's activity. Periodically closure. (45 seconds) are adjustable from zero the watchdog input (wai) of U18 is tog- Both of the relay -controlled siren to 90 seconds. Pressing the entry or gled to prevent it from resetting the outputs -which are activated by a exit delay switch displays the current processor. So long as the micro- zone violation or by pressing the pan- entry or exit delay, respectively, on the processor is running properly, the How- 33 ic switch -can handle 12 -volt, 1 -amp Iwo-digit LED display. To adjust either watchdog timer never expires.
www.americanradiohistory.comAmericanRadioHistory.Com O o O D D á D 6 $ D ó S < di+--- ó
gg9BRPas28 R 4 ñ 9m li i D D y 2 2 2 2 8 -41:8 C ° A m
á O N ST IJ (J 6. m Ó1 V ro g9222822Q.1 En 0°o 0 N N N N O $=gg IPA M m m m gm m m 9 °54PFS°8 + N W m m CO '8 V Z.1 á
'2) ) , , 1, 'i + m V m W A 4 g °S°Pas°S ó älEi ACV Ie o -0 v -0 . ?gu8g lrl 7.! N A 41 N+ O A ó g ó 2 ó 2 9 H5:AR.g 120 I A 8
m`n 8 W cr
co
N áD 1-1
Ci m a 10 NC NC +K if+' Smu gó óS°s°dR o 0 oc < á ñ co El ó Ováúáas9.ó A m V V m 8I.7..= °aasasssx m o ,he 4 ORS48sO pA + N v, 1+ 0 m o 0 N N O. v gá S S S:f S S S mN AM, m %ca ° O O O O O O O O VA 00 D ó m m A o e lm a 1l ä - - - 0 0 El m M < 0 0 0 0 0 0 0 0 0 0 ,r7 Ñ Ñ m +m+ +óÑ iÑ 6 V ^ O Fig. 3. At the heart of the main -control unit is U16, Zilog's Z8 8 -bit microcontroller, 34 which receives its program instruction from U17, a 27C64 8K X 8 EPROM. www.americanradiohistory.comAmericanRadioHistory.Com ever, should the microprocessor ever TO get locked up and fail to toggle vim 16VAC 2.1A within 1.6 seconds, pins 1 and 8 of U18 TRANSFORMER U1 go low, causing the microprocessor to R1 J4-7 1K 4N30 reset. Wir Although under normal conditions the processor should not lock up, un- D5 predictable behavior can occur, per- 1N914 haps due to nearby lightning strikes or other conditions that can adversely affect the power -supply circuitry. Es- +12V +5V SOURCE SOURCE sentially, U18 serves as failure protec- tion for the Home -Security System. U3 O The 78T12 - zone (sensor) inputs are ap- - D1 plied to port 2 (pins 31 -38) of U16, and G GI750 are pulled high through a 1k resistor y D4 ` 1N4001 network (R13). Switch S1, the ZONE -BYPASS -o J4-3 = B1 D3 12V LEAD -ACID switch (an 8- position DIP unit), is used -0 J4-5 1N4001 2.0 -Ah RECHARGEABLE C1 1+ to selectively disable any of the eight -0 J4-9 O +11 1000 D2 It zone inputs. Closing one of S1's eight 1N4001 positions disables its corresponding T O J4-10 o zone. Octal buffer U5 (a 74HCT245 unit) is used to read inputs from the six Fig. 4. The system's power supply provides 12 volts DC for the sirens and digital panel- mounted switches (S2 -S7), the keypad, and 5 volts DC for the on -board electronics, while also providing a constant panic switches, and the system arm - 12 -volt output that's used to charge the backup- battery. status. Those inputs are active -low and are pulled up through 1k resistor - for 600 baud, 8 data bits, no parity, the system is operating on backup - network R9. Switches 52-57 are used and one stop bit) provides the link be- battery power, causing it to respond to display and program the entry-and tween the main -control unit and an by lighting the battery LED on the exit -delay settings, reset the system X -10 computer interface (the model zone -status panel. after having been triggered, and test CP -290 or equivalent is recom- the sirens, as described earlier. mended). Since communication be- System Software. The most vital el- The two siren outputs are fed to a tween the main -control unit and the ement of the Home -Security System is pair of 4N30 Darlington- output op- X -10 interface is in one direction only its operating system. The major tasks toisolators (U9 and U12), which in turn, (from main -control unit to X -10 inter- of the operating system are to read drive a pair of 12 -volt, 2 -amp relays face), only two wires are needed. the zoNE- switch and SYSTEM- STATUS inputs; (however, the power supply only pro- The system's power supply, see Fig. to display the zone- and system- status vides for 1 amp per siren). Each 12 -volt 4, which is fed from a 16-volt 2.1 -amp information; to control the alarm -out- siren output is protected by a 2 -amp transformer (not shown), provides 12 put devices; to provide processing- slow -blow fuse (F1 and F2). A third op- volts for the sirens and the digital key- system timing; and to communicate toisolator/relay combination (U6 /K1) is pad, and 5 volts for the on -board with the X -10 interface. We will briefly used to activate the auto -dialer. A electronics, while also providing a discuss each of those tasks and how 2N2222 NPN bipolar transistor (Q1, constant 12 -volt output that's used to each is accomplished. which is capable of sinking up to 75 charge the backup -battery (B1 in Fig. The zone, control- switch, and sys- mA) is used to drive the main -control 4). Diodes D2-D4 are used to raise the tem- status inputs are all read in at a unit's internal warning buzzer. The reference of U3, thereby raising its out- frequency of 120 Hz, allowing even three relay- driven outputs, the warn- put to about 14 volts. The 14 -volt out- the fastest changes in any inputs to be ing- buzzer output, the keypad loop put of U3 is reduced one diode drop detected and processed according- and arm LED outputs, and the status - to about 13.3 volts by D1 and used to ly. To prevent false alarms, the zone panel SYSTEM ARMED and BATTERY LED out- keep the lead -acid backup- battery inputs are debounced for a minimum puts are all latched by U8. fully charged. Diode D1 also prevents of 100 milliseconds (ms), allowing The two on -board 7- segment com- current from the backup -battery from enough time for them to stabilize (only mon-cathode LED displays (DISP1 and flowing into U3's output terminal. Ca- after at least 100 ms are they consid- DISP2) are driven by latches U7 and pacitor Cl (a 1000 -µF unit) filters the ered valid). As with the zone inputs, the U10 through a pair of 470 -ohm resistor rectified voltage that is fed to U3. control- switch and system -status in- networks (R10 and R11). The zone -sta- Optoisglator U1, resistors R1 and R2, puts are also susceptible to noisy or tus -panel LED outputs are available at and diode D5 form a zero -crossing bouncing contacts and are similarly a dual -row header (designated J5) detector that is used by the micro- debounced. and are latched by Ull through a processor to determine when AC System- status information is dis- 470 -ohm resistor network (R12). power is applied to the power -supply played in three ways -on the op- Integrated circuit U4 (a MAX232 circuit. The absence of the zero- cross- tional zone -status panel; via a two - dual RS -232 transmitter, configured ing signal tells the microprocessor that digit 7- segment LED display; and 35 www.americanradiohistory.comAmericanRadioHistory.Com The operating- system software communicates with the X -10 interface O - \RT 1993 O ° by transmitting commands to the Z8's °. ... ___ serial port. When the entry -delay _ II: &.d` " timer is initiated (as a result of the de- ° lay -entry zone door opening while eo .eeo the system is armed), the operating system sends a command to the inter- 411 face to turn on the X -10 device set to house code A unit code 8. That allows ::-41/ o .--4;-* o the delayed -entry zone to be conve- . O ° . O ° niently illuminated to facilitate enter- ing the passcode at the digital M keypad after dark. For those that do not wish to pur- O chase the preprogrammed items 000000eeeeee0000eeeooe0000e eeeo eee e listed in the Parts List, the operating - system software can be downloaded 8 INCHES from the Gernsback BBS at I 516- 293 -2283. Fig. 5. The Home -Security System's main-control unit was built on a double -sided printed- circuit board with plated- through holes. The foil pattern for the component Construction. The main -control unit side of the board is shown here at half scale. of the Home -Security System was built on a double -sided printed- circuit though the system- status LED indica- are enabled for a specific amount of board with plated -through holes. The tors. The zone -status panel uses an time, which is precisely measured by foil patterns for the component and LED to indicate the status of each pro- the operating- system software. The solder sides of the board are shown at tected zone. At the time of arming entry and exit delays, as well as vari- half scale in Figs. 5 and 6, respectively, (during the delay interval), any open ous other system- timing delays, are for those who choose (and have the zone detected causes its correspond- handled by one of U16's two internal expertise) to etch their own board. For ing zone LED to light steadily. Once the timers. Its other internal timer is used as those who do not wish to make their delay times out and the system is a bit -rate generator, which is required own board, a double -sided board armed, violating any protected zone by the serial I/O for communicating with plated- through holes is available causes its corresponding LED on the with an X -10 computer interface-a from the source given in the Parts List; zone- status panel to flash, indicating device used by many home -control partial and complete kits, as well as that zone has been violated. enthusiasts to control household light- fully assembled and tested units, are The two -digit display is used to con- ing and appliances via the power also available. vey delay -time settings and other sys- line. Figure 7 is the parts- placement dia- tem- status information. Pressing either of the delay switches (entry or exit) causes the current delay -time setting to appear on the display. During an alarm condition, the violated loop is indicated on the two -digit display by a flashing "L ?;" where " ?" ranges from 1 to 8 representing the number of the violated zone. A flashing "P" on the display indicatesthatthe panic mode has been invoked. Pressing the RESET causes the total number of violations that have occurred since the system was last armed to appear in the two - digit display. The count is reset to zero each time the system is armed. The operating- system software is re- sponsible for controlling the various alarm outputs -internal and external 8 INCHES siren -control signals, the warning - buzzer control signal, the auto -dialer Fig. 6. The foil pattern for the solder side of the board is shown here at half scale. control signal, and the on -board Those who do not wish to make their own board, can purchase the board, a partial or piezo -buzzer control signal -based complete kit, or a fully assembled and tested unit from the source given in the Parts 36 on the inputs received. Those signals Lis'. www.americanradiohistory.comAmericanRadioHistory.Com gram for the Home -Security System's TABLE 1 -ZONE STATUS ANNUNCIATOR ment displays), and K1K3 (the DIP re- main -control board, Begin con- PANEL CONNECTOR SIGNALS lays). Note: the two 7- segment display struction by installing Cl, D1 D4, U2, Pin No. Signal Description modules (along with their sockets) BR1 Be- and the zone -bypass DIP switch U3, and of the power supply. 1 no connection fore installing any of the other com- 2 common should be mounted on the solder side ponents, test the power -supply circuit 3 no connection of the board. Resistor networks by connecting the output of a 16 -volt, 4 common R1O R12 can be replaced by discrete 5 Zone 8 Status LED 2.1 J4 -7 470 -ohm resistors if desired. The ma- -amp transformer to the and 6 common J4 -8 terminals. You should get a read - 7 Zone 7 Status LED jority of the parts are standard -stock ing of approximately + 13.3 volts DC 8 common i'ems that are available from most from J4 -9 to J4 -10; those terminals 9 Zone 6 Status LED mail -order distributors and local elec- feed charge current to the backup 10 Battery LED tronics suppliers. 11 Zone 5 Status LED The six panel- mounted, normally - battery. You should also measure 12 System Armed LED about + 13.3 volts DC at J4 -3 and 13 Zone 4 Status LED open momentary pushbutton switch- J4 -5. 14 +5 volts DC es are mounted to the front panel of 15 Zone 3 Status LED Measure the voltage from J4 -1 to the main -control unit's enclosure. The 16 +5 volts DC J4 -4 or J4 -6; you should get a 5 -volt switches are connected to terminals 17 Zone 2 Status LED DC reading. Next measure the DC 18 +5 volts DC J2 -2 through J2 -8 on the main -control voltage at the anode of Dl; it should 19 Zone 1 Status LED unit's printed- circuit board though read about 14 volts. None of those 20 +5 volts DC hook -up wire. The switches can be measurement should be more than temporarily wired to the main -control 5% off: If any of them exceeds a 5% mounted on the circuit board. unit for testing purposes prior to tolerance, recheck the power -supply When you are ready to begin in- mounting them on the front panel components placement and orienta- stalling the remaining components, (see "Preliminary Testing'). tion before proceeding with assem- start with the smallest units first. It is The design of the zone -status panel bly. That's necessary to prevent important that you use sockets for U16 is relatively unrestricted. In fact, status - damage to the other electronic com- (the microcontroller), U17 (the indicating LED's can, assuming that ponents that will eventually be EPROM), DISP1 and DISP2 (the 7-seg- there is sufficient room, be mounted J1 J2 J3 J4 Fig. 7. Begin construction of the Home -Security System's main- control unit by installing power- supply components Cl, DI -D4, U2, U3, and BR1 first. Once installed (and before mounting any of the other parts), test the power -supply circuit by feeding a 16 -volt, 2.1 -amp source to terminals J4 -7 and J4 -8. 37 www.americanradiohistory.comAmericanRadioHistory.Com TABLE 2 -MAIN CONTROL UNIT TERMINAL CONNECTIONS terminal connections J3 -5 and J3 -6, Terminal Signal Name Signal Description X- 10- controlled lights (and /or other TS1 -1 COMMON Zone Inputs Common devices) set to unit codes 1 through 8 TS1 -2 ZONE 1 Zone 1 Input (house code A) should cycle on and TS1 -3 ZONE 2 Zone 2 Input off at five -second intervals. Cancel TS1 -4 ZONE 3 Zone 3 Input the panic mode by pressing RESET TS1 -5 ZONE 4 Zone 4 Input the TSi -1 ZONE 5 Zone 5 Input switch, or allow the system to reset TS1 -7 ZONE 6 Zone 6 Input automatically in five minutes. TS1 -8 ZONE 7 Zone 7 Input Press the ENTRY DELAY switch to display TS1 -9 ZONE 8 8 Input Zone the default entry -delay setting on the TS1 -10 PANIC Panic Button(s) Input 7- segment displays. Likewise, pressing TS2 -1 COMMON Panic Inputs Common the EXIT DELAY switch TS2 -2 ENTRY DELAY Entry Delay Button Input displays the default TS2 -3 EXIT DELAY Exit Delay Button Input exit -delay setting. To adjust either de- TS2 -4 ADJUST+ Adjust+ Button Input lay setting up or down, press the TS2 -5 ADJUST- Adjust- Button Input ADJUST+ or ADJUST- switch, respectively, TS2 -6 RESET Reset Button Input while holding down the appropriate TS2 -7 TEST Test Button Input TS2 -8 COMMON Panel Button Inputs Common delay switch. The maximum setting for TS2 -9 INT SIREN Internal Siren Positive Terminal both delays is 90 seconds. Note that TS2 -10 COMMON Internal Siren Common pressing any of the panel- mounted TS3 -1 EXT SIREN External Siren Positive Terminal switches results in a click sounding on TS3 -2 COMMON External Siren Common the piezo buzzer. Press both of the ad- TS3 -3 AUTO- DIALER Auto -Dialer N.O. Output just switches simultaneously to toggle TS3 -4 AUTO- DIALER AUto -Dialer N.O. Output -click TS3 -5 X -10 INTERFACE X -10 Computer Interface Output button mode. TS3 -6 COMMON X -10 Computer Interface Common There are two test modes that can TS3 -7 LOOP STATUS Keypad LOOP LED Output be invoked. Pressing and holding the TS3 -8 WARNING Warning Buzzer Output TEST switch for at least three seconds TS3 -9 PANIC/TAMPER Keypad Panic Input invokes a test mode that activates the TS3 -10 ARM INPUT Keypad Arm Status Input three relays and flashes the LED's on TS4 -1 +5 VDC Keypad +5 -volt Output TS4 -2 ARM STATUS Keypad ARM LED Output the zone -status panel. The test mode TS4 -3 +12 VDC Keypad +12 -volt Output remains active for as long as the TEST TS4 -4 COMMON Keypad Common switch is held down. A power -up self - TS4 -5 +12 VDC Auxilliary Device +12 -volt Output test can be invoked by holding down TS4 -6 COMMON Auxilliary Device Common the TEST switch while applying power to TS4 -7 16 VAC INPUT 16 -volt AC Input TS4 -8 16 VAC INPUT 16-volt AC Input the main -control unit. During the self - TS4 -9 BATTERY+ Backup- Battery Positive Terminal test mode, each alarm output device TS4 -10 BATTERY- Backup- Battery Negative Terminal is enabled sequentially for one sec- ond in the following order: on -board piezo buzzer, internal siren relay, exter- to the front panel of the main -control sure maximum heat transfer. nal siren relay, auto -dialer relay, and unit's enclosure and labeled accord- On power -up, the on -board buzzer keypad- warning buzzer. The two 7- ingly, eliminating the zone- status pan- should beep once, indicating the suc- segment displays cycle through digits el altogether. Any way, regardless of cessful initialization of the hardware 0 through 99 during the self -test mode your zone -status -panel layout, the and firmware (system software). The to reveal any defective segments. If panel signals are available at J5 (see right-hand decimal point of the right the zone -status panel is connected to Table 1). Connections between the 7- segment display (DISP1) flashes at the main -control unit, the system cy- status panel and the main -control unit one -second intervals, indicating the cles through the zone -status LED's in should be made through a length of a proper operation of the system. The sequence. That mode also remains 20- conductor ribbon cable. panic input can be tested by mo- active for as long as the TEST switch mentarily shorting the panic -input ter- remains down. Releasing the TEST Preliminary Testing. Once the cir- minals (terminal connections J1 -10 switch cancels the self -test and pro- cuit has been assembled and all off- and J2 -1). That should result in the let- ceeds to normal operation. board components connected to the ter P flashing on DISP1 and the activa- main control board, it can be tested tion of all three relays (K1 --K3). If the Installation. The assembled control as a stand -alone unit. Before power- zone -status panel is connected to J5, unit should be installed in an en- ing up the main -control unit, however, all of the zone -status LED's should also closure suitable for recessed or sur- be sure that heat sinks have been in- begin flashing. To help identify when face mounting. The selected en- stalled on the voltage regulators, U2 the relays are activated, connect a 1k closure should be large enough to and U3, to permit maximum power resistor in series with an LED to the out- house both the backup- battery and dissipation. When mounting the heat put terminals of each relay. Be sure to the main -control unit. The enclosure sinks to the regulators, be sure to use connect the anode of the LED to the should be mounted in an accessible thermal compound between the positive -output terminal. location not near any of the perim- 38 heat sink and the regulator tab to en- If an X -10 interface is connected to eter entrances or windows. Some sug- www.americanradiohistory.comAmericanRadioHistory.Com gestions include the master -bedroom HARD -WIRE THESE closet, behind the master -bedroom TWO CONNECTIONS ON ARM INPUT BACK OF KEYSWITCH J3 -10 door, in a utility room, or in a base- ment closet. The location should be convenient for routing wires either through conduits or through the walls. As many as 29 wires may need to be routed to and from the main -control unit, not including connections for power. (See Table 2 for a description of the terminal connections on the main -control unit.) Connect the out- put of the 16 -volt AC transformer to PANIC INPUT terminals J4 -7 and J4 -8 to provide the J3 -9 main control unit with power. If a re- ARM STATUS is avail- chargeable backup- battery J4 -2 able, connect the positive terminal to +5VDC POWER LOOP STATUS terminal J4 -9 the nega- J4-1 and connect t;tt rr c r J3 -7 tve terminal to J4 -10 on the main - +12VDC DO10-20V J4-3 control unit. Be sure to observe the polarity of the terminals when making the connections! The digital keypad should be mounted in a convenient location REAR VIEW OF DIGITAL KEYSWITCH NOTE: near the entry door. It should be CONNECT NEGATIVE TERMINAL OF WARNING mounted approximately eye level in a BUZZER TO GROUND AND POSITIVE TERMINAL TO single -gang wall -box. A total of eight MAIN CONTROL UNIT TERMINAL CONNECTION 28 wires should be routed from the main (J3 -8). control unit to the keypad. The wires Fig. 8. The connections between the keypad and the main -control unit are illustrated should be connected to terminal here. Simply connect each point on the keypad to the like -labeled point on the main - connections J3 -7 through J4 -4. Figure control unit. 8 describes the connections between tinguished from one another. Try to Multiple panic switches can be lo- the keypad and the main control unit. keep all wires concealed when wiring cated at strategic points throughout Connect the positive terminal of the the zone switches. Take advantage of the house to provide the homeowner remote warning buzzer to +5 volts, crawl spaces, uninsulated interior with convenient access should it ever and the negative terminal to the wire walls, and accessible attic space become necessary to invoke the connected to terminal connection whenever possible. As a suggestion, panic mode. The switches should be J3 -8 of the main control unit. Program route all zone- switch wiring to a cen- normally open momentary pushbut- the keypad to respond to a 4 -digit tral terminal strip and connect the ton switches wired in parallel with one code that you select as per the man- common wire of each zone input to a another. Connect the network of pan- ufacturer's instructions. single terminal. Then route nine wires ic switches to the main -control unit via After making the appropriate con- (eight zone inputs plus one common) terminal connections J1 -10 and J2 -1. nections to the remote warning buzz- from the terminal strip to the main - Radio Shack sells pushbutton switches er, it should be placed inside the wall - control unit terminals J1 -1 through (for under $2 each) that are perfect box before mounting the keypad. If J1 -9. If the crawl space is used for rout- for this application. One panic switch additional keypads are desired, they ing the wires and its access door is should be mounted on or under a should be wired in parallel with one accessible from the exterior of the bedside table for convenient access another. Up to eight normally -closed house, be sure to protect it with one of from the bed. Other panic switches zones can be monitored by the the instant -trigger zone inputs. If a mo- elsewhere in the home should be Home- Security System. Each zone tion detector is to be used with the mounted out of the reach of small can include as many normally closed system, connect it to zone 8 (the silent children. switches as necessary to provide the zone). Power for the motion detector is The emergency auto -dialer should desired protection. Take some time to available on J4 -1 ( +5 -volts DC) or be located in a convenient location think aboutthe selection of protection J4 -5 ( +12 -volts DC) depending on near a telephone outlet. The normally zones before drilling holes to mount the voltage required. open inputs of the auto -dialer should the sensor switches. The switches for The zone -status panel should be be connected to terminal connec- windows in the same room can be mounted in a location near the main - tions J3 -3 and J3 -4 of the main -con- wired in series for a single zone of pro- control unit. The recommended trol unit. Refer to the operator's tection. Each perimeter door, how- mounting location is on top of the manual included with the emergency ever, should be wired in separate main -control unit enclosure, and pref- auto- dialer for instructions on pro- protection zones, if possible. That al- erably, in a position that is visible from gramming the telephone numbers. lows those critical zones to be dis- the homeowner's bedside. The X -10 computer interface can be 39 www.americanradiohistory.comAmericanRadioHistory.Com placed in any convenient location, PARTS LIST FOR THE HOME -SECURITY SYSTEM and should be connected to the main -control unit via terminals J3 -5 C7C11--0.1-11F, ceramic -disc SEMICONDUCTORS C4, and J3 -6. C12, C13- 10-pF, ceramic -disc U1, U6, U9, U12 -4N30 Darlington The internal siren should be output optoisolator /coupler, mounted in a central location in the integrated circuit ADDITIONAL PARTS AND MATERIALS home, with its positive connected to U2-MC7805C 5 -volt, 1 -amp voltage regulator (T0-220 package), B1 -12 -volt, 2.0-AH rechargeable terminal J2 -9 and its ground con- integrated circuit battery (Mouser P/N 547 -PS -1220) nected to J2 -10. The external sirer U3- MC78T12C 12 -volt, 3 -amp BZ1- Piezoelectric buzzer (Radio should be mounted in a location that voltage regulator (10-220 Shack P/N 273 -074) allows its sound to be directed outside package), integrated circuit Fl, F2 -2 -amp, slow -blow fuse the home. It can be mounted either in U4- MAX232 5 -volt dual Kl K3 -SPDT 5 -volt, 2 -amp relay the attic facing a gable vent, or out- (Radio Shack P/N 275 transmitter/receiver, integrated -243) side under a suitable roof overhang. S1-8- position DIP switch circuit The external siren connects to the TRI -state octal S2 S7 -SPST momentary contact U5- SN74HCT245 main -control unit via terminal con- tranceiver, integrated circuit pushbutton switch nections J3 -1 (positive terminal) and U7, U8, U10, U1l- SN74HCT374 JIJ4-10- position terminal block TRI -state octal D-type flip -flop, J5 -20 -pin dual -row header J3 -2. integrated circuit XTAL1- 7.3728 -MHz crystal U13-SN74HCTOO quad 2 -input Printed- circuit materials, enclosure, System Testing. Once all of the NANI) gate, integrated circuit two TO -220 heat sinks, five 14 -pin components of the system have been U1'1 SN74HCT138 3 -to -8 line DIP sockets, one 28 -pin DIP, one wired together, they can be tested decoder, integrated circuit 40 -pin DIP socket, fuse clips, 16- collectively as a system. After apply- U15-SN74HCT373 TRI -state octal volt 2.1 -amp transformer, digital ing power to the main -control unit, keypad (Radio Shack P/N 49 -535), D-type latch, integrated circuit enable each zone of the system by Zilog Z8 normally closed magnetic switches U16 -Z8691 (or Z8681) turning off (opening) the corresponc- ROMless microcontroller, (Radio Shack P/N 49 -496), panic ing zone - bypass switch. Secure all integrated circuit switches (Radio Shack P/N zones and check the zone status pan- U17 -27C64 8K x 8 EPROM, 49 -517), emergency auto -dialer integrated circuit (Radio Shack P/N 49 -433), el to verify that all zone LED's are off. U18- MAX705 microprocessor internal two -sound siren (Radio Also check the LOOP LED on the digital supervisory circuit, integrated Shack P/N 49 -490), high -power keypad to see that it is off. Check the circuit external siren (Radio Shack P/N operation of each zone input by sim- Ql- 2N2222 general -purpose NPN 49 -525), X -10 computer interface ulating opening a protected door or (Model CP -290 available from silicon transistor window in that zone, and verifying X -10 USA), twisted -pair alarm D1 -G1750 6 -amp, 50 -PIV rectifier that the corresponding zone LED on diode wire, zone status panel materials, the zone -status panel lights. The LOOP D2 D4- 1N4001 1 -amp, 50 -PIV 20-conductor ribbon cable, LED should also light when any of the rectifier diode connectors, wire, solder, hardware, opened. A short D5 D8-1N914 general- purpose etc. enabled zones are silicon diode beep should be heard from the key- BR1-4 -amp, 600 -PIV full -wave Note: The following items are pad warning buzzer when each zone bridge rectifier available from John Taylor, P.O. door or window is opened. If zone 8 is LEDI LED10* -Red light- emitting Box 1281, Lawrenceville, GA being used, verify that triggering its 30246 -1281 (Tel: 404- 682 -1368): diode input is reflected on the zone - status common - The main -control unit double -sided DISPI, DISP2 -7- segment panel and the keypad LOOP LED, but silk -screened, printed- circuit cathode LED display (Radio Shack does not sound a beep on the key- P/N 276-075) board, $35.50 + 2.50 S /H; preprogrammed and tested EPROM pad warning buzzer. RESISTORS and Z8691, $36.50 + 2.50 S /H; a Once all zones have been check- (All fixed resistors are 1/4-watt, 5% partial parts kit (including the ed, check the operation of each zone units.) printed- circuit board, and a input with the system in the armed R1, R2 -ohm -1000 preprogrammed and tested EPROM state. As a courtesy to your neighbors R3, R5, 330 -ohm R8- and Z8691), $59.50 + 3.50 S/H; a during testing, you may want to dis- R4, R7-470-ohm complete parts kit (containing a able the external siren by removing R6- 10,000 -ohm double -sided silk- screened, fuse F2. You may also want to discon- R9, R13, R14 *- 1000 -ohm x 9 DIP printed- circuit board and all parts nect the auto -dialer during the sys- resistor network to build main -control unit), Arm the R10R12 --470-ohm x 8 DIP resistor $149.00 + 5.00 S /H; an tem- testing procedures. network assembled (includes 2 -AH system by entering the programmed four -digit code on the digital keypad. CAPACITORS rechargeable lead -acid backup - The warning buzzer should sound and C1- 1000 -µF, 35 -WVDC, battery) and tested main -control electrolytic unit mounted in an enclosure, the ARM LED on the keypad should C2, C3, C5, C6- 22 -RF, 16 -WVDC, $249.00 + 10.00 S /H. light. Go to the zone - status panel and tantalum *Not shown on schematic verify that the SYSTEM ARMED LED is on, 40 (Continued on page 92) www.americanradiohistory.comAmericanRadioHistory.Com Variable Frequency RF Oscillators Varable- frequency oscillators BY JOSEPH J. CARR (VFO's) are radio- frequency signal generators that can be We present some variable, continuously tuned using an inductor connected to either an air variable RF- oscillator designs that you can build. capacitor, mica "trimmer" capacitor, or a voltage -tuned variable- capaci- back at the amplifier input must be By the way, it is a good idea to use tance diode (varactor). A VFO differs phase shifted 360 degrees. For most only regulated DC power supplies from the crystal oscillators used in practical circuits, with 180 degrees of with oscillator circuits. That's because many transmitters in that a VFO's fre- phase shift provided by an inverting most oscillators shift frequency a slight quency can be varied, while a crystal amplifier, the feedback network must amount when the power -supply volt- oscillator is either fixed or variable provide an additional 180 degrees of age changes. In fact, most experts over only a tiny range. phase shift. agree that a regulator deadicated to Variable- frequency oscillators can just the oscillator is best because it is be used as signal generators in test not affected by load changes in other OUT equipment, to control ham transmit- circuits. If you are a ham -radio oper- ters, as the local oscillator in either a ator familiar with CW (i.e., Morse - superheterodyne or direct -con- code) transmission, then you will rec- version receiver, or in any other ap- ognize such variation as a transmis- plication where a continuously varia- sion defect called "chirp." Although ble source of RF siganls is needed. In Fig. 1. As this block diagram reveals, a not all of the oscillator circuits in this feedback oscillator is comprised of an am- this article, you will find some practical article show a regulator, it is a good plifier and a tuned feedback loop. circuits that are based on easily ob- idea to use one anyway. tained components, as well as some general guidelines for modifying the Input. There are two general cate- circuits for your own use. gories of RF oscillator that we will con- OUT sider here: those with parallel tuned RF Oscillator Basics. Both VFO's tanks (such as Hartley or Colpitts cir- and crystal oscillators are part of a cuits), and those with series tuned class of circuits called feedback os- A tanks (for example a Clapp oscillator). cillators. Figure 1 shows the basic con- The circuit in Fig. 2A is a Hartley os- figuration of this type of circuit; it cillator. It is identified by the tapped consists of an amplifier with open - inductor in the feedback network, loop gain A vo, and a feedback net- which effectively forms an inductive N C work (which is usually frequency se- OUT voltage divider. Colpitts and Clapp w lective) with a "gain" of 13 (beta). If two circuits (see Fig. 2B) are identified by m conditions-called Barkhausen's cri- the fact that the feedback network teria met, then the circuit will os- volt- a -are B contains a tapped -capacitance cillate. The two conditions are: the Fig. 2. Shown here are the basic makings age divider. loop -gain must be unity or greater, of a Hartley oscillator (A) and a Colpitts For our circuits, we will use one of and the feedback signal arriving oscillator (B). three active devices as the amplifier 41 www.americanradiohistory.comAmericanRadioHistory.Com tions, one each for the MPF102 and Fig. 4A). For a Hartley or Colpitts os- Cl 40673. Figure 3A shows the circuit for cillator, a parallel -tuned circuit is used 100pF 01 MPF102, the JFET device. It consists of a gate (see Fig. 4B). In the case of the Hartley NTE312, OR resistor of 100k ohms to ground, and a oscillator, the inductor (L1) will be D1 ECG312 1N4148 diode (1N914, 1N4148, or equivalent). tapped. Both fixed -value and varia- The diode in the input circuit perplex- ble inductors can be used for the cir- es some people when they first see it. cuits. R1 Its function is to clean up the signal, In any LC resonant circuit, reso- 100K and make it closer to a low- harmonic nance is that point where the induc- sinewave. In many cases, you will tive reactance and capacitive reac- A need to use a capacitor such as Cl in tance are equal to each other. the gate circuit, especially if there is a Because the reactances cancel out, +12VDC DC source or ground directly in the the impedance of such a circuit is R2 C2 .01 circuit, In order to prevent loading of purely resistive. 33K 1 the tuned circuit, it is customary to Also, the nature of an LC -tuned cir- 01 make the coupling capacitor small cuit is that it can provide a 180 -de- 40673 NTE222 compared to the tuning capacitor; gree phase shift at its resonant ECG222 typically values from 2 to 10 pF are frequency. So as long as an LC tank is used for high- frequency and medi- used with an inverting amplifier, to- um- wave VFO circuits. gether they will meet the 360- degree The same circuit can be used for phase -shift requirement for an os- the MOSFET, but there must also be ci cillator. DC -bias circuit for the second gate, It is generally true that there should G2. The bias network made of R2 and be a high C/L ratio, so it is common B R3 in Fig. 3B is set to bias G2 to about practice to select a relatively low -val- Fig. 3. The gate circuit for a JFET os- 1/3V +, but I've also used equal valued ue inductor, but a high -value of ca- MOSFET cillator (A) is the same for a resistors (10k each) for R2 and R3. A pacitance. Many of the oscillators n oscillator (B) although the MOSFET bypass /decoupling capacitor (C2) is this article are designed for the mid- needs an additional bias network for its used to ground any RF at G2, while dle of the 1- to 10 -MHz band, and use extra gate. keeping G2 at the bias voltage for DC. - +12V 4 J.. )t -J Tuning. The tuned circuit for a Clapp = C6 1 oscillator can be series -tuned (as in C7 +12V R4 C5 220D .01 it R1 C5_ A 18052 01 1W li MPF102, OR R3 15052 C4 D1 ECG312 C6 01 9.1 VOLT .1 R2 1 I 400m W 100K C8' D2 .001 T 1N4148 B C3 OUTPUT B Fig. 4. These typical tuning 10pFT are circuits. 141 at The one in A is parallel resosnant, while `900000 9Z the one in B is series resonant. 1 C2 T1 = .- .01 C9' 51 V I D1 80pF portion: an MPF102 junction field - C 1N914 TRIMMER effect transistor (JFET), a 40673 metal - b OUTPUT A oxide field -effect transistor ( MOSFET), Cl* C2' or the Signetics NE602 RF balanced - MAIN TRIMMER mixer integrated circuit. Equivalents of TUNE D1 NUi NTE618, OR R1 the two transistors are also available ECG618 10K VT NTE from distributors who carry ECG or O 0-12 L1' radio /N replacement parts. The OPTIONAL VOLTS MPF102 is replaced the ECG312 by Fig. 6. This voltage -tuned JFET Hartiey and the NTE312, while the 40673 is Fig. S. This simple Hartley JFET os- oscillator can be made to sweep its entire replaced by the ECG222 and NTE222 cillator has a built in Zener -diode reg- frequency range by applying a sawtooth devices. ulator to condition the power- supply waveform that rises from 0 to 12 volts to the 42 Figure 3 shows two input configura- voltage down to 9.1 volts. V, input. www.americanradiohistory.comAmericanRadioHistory.Com inductances on the order of 3.3 to 7 +12VDC mH. Those inductances are relatively )I C9 easy to obtain when using either "so- .1 lenoid" (cylindrical) or "toroidal" coil R2 = forms. See the Amidon Associates (PO. 10052 Box 956, Torrance, CA 90508) catalog %1 for information on winding both sorts C8 .01 of coils. Also, Barker & Williamson (10 01 NTE312 Canal Street, Bristol, PA, 19007; Tel. MPF102 215 -788 -5581) makes air -core coil stock that is suitable. T1 The capacitance can be made up NO.28 ENAMELED WIRE FT CORE of more than one capacitor, and that ON -50-43 R1 R5 is generally the best practice. The 1MEG 100K RF OUTPUT of frequency is proportional change R4 to the square root of the ratio of the , C6 68K v capacitance change: -3pF Cl 365pF fmax/fmin - Cmax/ Cmin 1 C4 C5 02 That is why a variable capacitor for 100pF 82pF the AM broadcast band consists of a NTE222, OR v 40673 25- 365 -pF air variable capacitor shunted by a 25 -pF (or so) trimmer C3 129pF capacitor (which is usually set to around 15 pF), The 3.08:1 ratio of max- 271 C2 0000QQ,Q imum to minimum capacitance is 34pF A L1 more than sufficient to cover the I 3.02:1 ratio of the maximum and mini- T -50-2 CORE C15 R8 mum frequencies of the AM band. .01 10K VT Selecting values of L and C is a = somewhat tedious and iterative affair. NTE618 One is advised to sit down with a cal- 7. A via Cl, or if culator and make a few trials. Part of Fig. Hartley oscillator with buffer amplifier. This circuit can be tuned CI is removed and the varactor network is connected to point A, a tunning voltage can be the problem comes from the fact that used instead. both fixed and variable capacitors come in standard values, which may not be exactly what's needed. Juggle the value of the inductor (which can 12- be easily wound to a custom value) to 11- provide the desired frequency change when used with commonly 10- available variable capacitors. 9- It is common practice to make the Z 8- w total of the fixed capacitors plus the á 7- maximum values of the variable (main -tuning and trimmer) capacitors ó 6- somewhat larger than the total re- Z 5- z quired to resonate at the very lowest 4- frequency in the desired range. When 3- the trimmer is set to a value less than 2- ô the maximum, the total capacitance $ will be close to the desired value. 0 I I I I I I I I IT I I I I I I I I I I Hartley JFET VFO. The Hartley os- 2 2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 cillator, as you might recall from I (MHz) above, is identified by a feedback Fig. 8. This tuning characteristic curve shows the relationship between the varactor's path that includes a tapped inductor; tuning voltage and ouput frequency for the oscillator in Fig. 7. Please note that lower but the inductor is also part of the frequencies could've been acheived if lower tuning voltages were used. resonant tuning circuit of the os- cillator. Figure 5 shows a simple through a small -value capacitor (to The frequency of oscillation is set by Hartley oscillator based on the limit loading) connected to the emit- the combined effect of L1, C1, and MPF102 JFET. The output signal is taken ter of the transistor. C2: www.americanradiohistory.comAmericanRadioHistory.Com frequencies f= 1/(2n£ L1(C1 + C2) band filter. Other sweep are usable as well, but care must be To resonate at 5 MHz with a 5 -mH taken not to "ring" any following reso- inductor, a total capacitance of nant circuits or filters because of an about 200 pF is required. Because of excessive sweep rate. in stray capacitance and variations The tuning properties of a varactor - it is the values of actual capacitors, tuned LC circuit are nonlinear be- total common practice to use more cause of the nature of varactor d - use capacitance than needed, and odes. It is recommended that a graph variable capacitors to trim the total of tuning voltage versus frequency be down. For example, we could use a made, and that only the linear portion 140 -pF variable capacitor for main of the curve be used for sweep pu-- tuning, and an 80 -pF trimmer to set poses. the maximum to the required value. The circuit shown in Fig. 7 is capable Figure 6 shows a 5 -MHz Hartley VFO of producing as much as several volts circuit also based on the MPF102 JFET. (yes, volts) of signal in the 1- to 10 -MHz It is very similar to the previous circuit in range. The actual tuning range de- basic concept, but there are some pends on the particular components used. The heart of the oscillator is an 5V MPF102 JFET (Q1). Two different tuning R1 C7 schemes are possible. As shown, for a R2 .01 1000 10K 4 OR 5 limited range (5000-5500 kHz), main I- tuning is provided by Cl, a 365 -pF AM Fig. 9. The JFET VFO circuit shown here C6 can be identified as a Clapp oscillator by .01 broadcast -band tuning capacitor. In o that the varactor diode (D2) is its series tuned LC network. The circuit as RF OUT case, 6 Cl shown can be used from 0.5 to 7 MHz. disconnected and not used. 100pF The alternate scheme deletes Cl, and uses the varactor circuit shown C3 connected at point "A." That version .01 C2 100pF has a wider tuning range for the same Tr capacitance change. That's because R3 10K in the unmodified circuit, the tuning range was reduced by the capacitor - 'SEE TEXT divider action of C4 and C5. 12. This voltage -tuned Clapp os- Fig. As an alternative to the varactor cir- cillator uses a varactor diode to set its cuit, you can connect Cl to point 'A" operating frequency. instead of the junction of C4 and C5. differences. The most significant dif- That will also provide a wide tuning C3'i ference is the use of a variable -ca- range. pacitance diode (varactor) instead of The circuit can be further modified SEE TEXT the main tuning capacitor. The diode by adding or subtracting capacitors Fig. 10. Three capacitors (CI, C2, and shown is a 14-440 -pF varactor used to from the tuning network. As shown, C3) are used in this NE602AN IC Colpitts in C1 -05 are all part of the tuning cir- oscillator circuit, rather than two, be- tune the AM broadcast band radio cause of a need for DC blocking. receivers. Another significant dif- cuit. ference is that the output signal is The main inductor (L1) consists of 35 taken from a secondary winding on turns of No. 28 enameled wire on an the tuning inductor. That winding con- Amidon T-50 -2 (red) toroidal core. The sists of fewer turns than the lower tap is placed at eight turns from the portion of the main -tuning inductor. ground end. The tap is formed by Care must be taken to not load down winding two separate, but con- the circuit by connecting a varying tiguous, windings: one of 8 turns and load resistance across the output one of 27 turns. The windings are con- winding. nected together electrically at the The circuit of Fig. 6 can be made to point where they butt together. The sweep the entire frequency range by two wire ends of the Iwo coils are sol- j applying a sawtooth waveform that dered together and used as a single rises from 0 to 12 volts to the varactor. wire to connect the tap to the source.. This type of circuit makes it relatively of the JFET Fig. 11. You can tell this is a Hartley os- easy to build a sweep-generator, or a The drain of the JFET is kept at cillator by noting the tapped coil in the LC receiver. In gener- ground potential for RF signals by the tank network. The inductor is tapped from swept -tuned radio bypass capacitor, C8. The output sig- one-fourth to one -third the way from the al, the sweep rate should be around 94) ground end. 40 Hz If the detector has a narrow (Continued on page www.americanradiohistory.comAmericanRadioHistory.Com IGNITION N,UGHTS DISABLE ON NORMALI Build a a Multi- Function Car Security System Protect your second most -valuable investment from carjackings, without placing yourself in harm's way, with this remote -controlled security system BY ANTHONY J. CARISTI A(though this project was de- a handheld crystal -controlled trans- the transmitter, which is built around signed specifically as an mitter and a super heterodyne re- U1, the MC145026 programmable en- automotive emergency se- ceiver, operating at 49 MHz. As coder. The encoder has five address curity system, its capabilities encom- designed, the system can control 4 lines and four data lines. Although the pass much more than that. It is a discrete devices, but its 9 -bit data sys- 5 -bit address allows up to 32 discrete complete radio -frequency (RF) re- tem can be easily expanded to con- channels (00000 through 11111), only mote- control system that allows the trol up to 15 separate circuits on 32 one address is required in this ap- user to control one or more vehicular channels. Its digital encoding /decod- plication. For that reason, U1 pins 1-5 electrical circuits from a distance via ing scheme prevents accidental op- are tied to ground, giving an address a digitally- encoded RF transmitter sig- eration from stray RF fields or other of 00000. nal. The controlled circuits can be in a interference. The remaining four lines (data in- stationary or moving vehicle. The transmitter (powered from a 9- puts) of U1 can be coded for any bin- One of the system's most important volt transistor -radio battery) is as- ary number from 0001 through 1111. A functions is to help foil attempted car - sembled into a very small enclosure pair of switches (S2 and S3) are used jackings, where the driver would pas- that easily fits into a shirt pocket or to place either a logic 1 or logic 0 on sively surrender the vehicle, and handbag. The receiver, on the other two of the data lines (pins 7 and 6, d'sable it, via the remote transmitter, hand, is powered from the car's 12 -volt respectively) to produce on or off from a safe distance once the per- electrical system, and draws very little control signals. The remaining two petrator has driven off. Once the vehi- current, allowing continuous opera- data lines are not used, but the system cle stops, the hijacker will have no tion with little or no danger of running can easily be expanded to four -chan- choice but to abandon the vehicle. down the vehicle's battery. nel operation by using those in a sim- However, a more common applica- ilar manner to pins 6 and 7. tion would be to use the transmitter to Transmitter. The Car Security System Aside from the programmable en- remotely sound the horn or turn on the is based on a pair of digital CMOS coder (U1), the transmitter is com- lights to provide an extra margin of chips, the MC145026 programmable prised of a crystal oscillator, modu- safety when needed, perhaps, to encoder, and the MC145027 pro- lator, and a power amplifier, and is scare off a would -be attacker, or to grammable decoder, which are spe- powered from a 9 -volt transistor-radio allow one to quickly locate the vehi- cifically designed for remote -control battery, which supplies an average of cle in a large crowded parking area. applications. about 7 mA to the circuit. Transistor Q1 The two -part system is comprised of Figure 1 is a schematic diagram of (an MPF102 FED is configured as a 47 www.americanradiohistory.comAmericanRadioHistory.Com ANTI combination high -gain intermediate - frequency (IF) amplifier and detector/ L1 TK1601 amplifier circuit, U3 and U4, respec- 1.6pH tively, an LM358 dual low -noise op- T2 amp (U5), and the MC145027 pro- S1 R1 TK1407 grammable decoder (U6). TRANSMIT 22052 .41pH 0 Vw The antenna circuit (composed of r .7 C2I C11, C12, and L2) is tuned to the trans- C5 .1 R2 22pF mitter's operating frequency (49.86 MHz). The RF energy picked up by the B1 T1 r is 9V TK1407 I antenna fed to U2, the NE602. The 1 C4 Q2 C9 C3 41pH is ! 22pF BOTTOM .001 NE602 used as a mixer /local os- 22p F Q2 VIEW cillator, heterodyning the incoming RF 2N5179 B with the LO output to extract the inter- 1 mediate frequency (IF). The frequency XTAL1 o 49 86MHz CASE of the local oscillator (39.16 MHz) is S D G 03 MPF102 I controlled by a parallel tuned reso- l ) BS170 Q1 nant circuit composed of 015, C16, BOTTOM C17, and L3. VIEW R3 R4 1MEG10052 C6 C8 DGS PARTS LIST FOR THE 001 001 03 TRANSMITTER -- BOTTOM C10 VIEW SEMICONDUCTORS R5 U1- MC145026P programmable 16 15 49.9K 13 encoder, integrated circuit VN QI- MPF102 general -purpose FET C7 Q2- 2N5179 NPN silicon transistor O DISABLE ON U1 Q3 -BS170 TMOS FET MC145026P ---CL**INORMAL OFF RESISTORS 11 S2 S3 NA4 (All fixed resistors are %a -watt, 5% CHANNEL CHANNEL R6 carbon units, unless otherwise A B 100K IGNITION noted.) LIGHTS/HORN R1- 220 -ohm R2- 22,000 -ohm Fig. I. The transmitter for the Car Security System is built around Ul, an MC145026 R3- 1- megohm programmable encoder -one of a pair of digital CMOS chips that are specifically R4-100 -ohm designed for remote -control applications. R5-49,900-ohm, 1/4-watt, 1%, metal -film R6- 100,000 -ohm. 1/4-watt, 1%, crystal -controlled Pierce oscillator, capacitive. Loading coil L1 is used to metal -film with its feedback from drain to gate cancel out the effects of the anten- provided by XTAL1 (a 49.86 -MHz crys- na's capacitive reactance and allow CAPACITORS tal that operates in the third -overtone maximum power transfer. Cl, C2, CIO 0.1 -µF, ceramic -disc C3- C5 -22 -pF ceramic -disc or mica mode). A parallel tuned circuit con- The encoder is activated when C6, C8, C9-0.00111E', ceramic -disc sisting of T1's primary and C3 is set to power is applied to the transmitter via C7- -0.0047 -11F, mylar the third -overtone frequency, causing switch, S1. Integrated circuit U1 pro- the circuit to oscillate. vides a serial -data pulse train that ADDITIONAL PARTS AND MATERIALS The output of the oscillator is fed contains address (00000), and data ANTI- Antenna (see text) through T1 to the base of Q2, whose information as determined by the set- S1 -SPST normally-open pushbutton forward base -bias is supplied through tings S2 and S3. The emitter of Q2 is of switch R2. The secondary of transformer T2 is grounded through Q3, an enhance- S2, S3 SPDT toggle or slide switch placed in the collector circuit of Q2, ment TMOS FET that acts as a switch. BI -9 -volt transistor -radio battery with the primary parallel tuned to The gate of Q3 is forward biased by L1- 1.6 -µH inductor (Toko, Digi- 49.86 MHz via C5. The low- imped- the output of U1, amplitude modulat- Key TK1601) ance secondary of T2 is then used to ing the transmitted signal, which con- Tl, T2-0.41111-1, RF transformer drive the antenna circuit. sists of RF pulses that represent logic l's (Toko, Digi -Key TK1407) The transmitter is designed to oper- and 0's. XTALI -49.86 -MHz, third -overtone ate into a 36 -inch antenna wire, crystal Printed- circuit materials, enclosure, which is shorter than the nominal 1/4 Receiver Circuit. The super- IC sockets, 9-volt battery holder 49.86 MHz (or 54 heterodyne receiver (as shown in Fig. wavelength at and connector, wire, solder, inches). Such an antenna presents an 2) is composed of an NE602 double - hardware, etc. 48 impedance that is both resistive and balanced mixer (U2), followed by a www.americanradiohistory.comAmericanRadioHistory.Com +12V 4404 'Hh R7 R9 22052 Dt I 22052 1N4740A C24 10V C20 .1 _L ANT2 01 R20 L4 4.7K TK3006 .422µH L5 FILI C21 TK3006 TK2306 .001 5 C11 .422µH 47pF1 10.7MHz PL1 J1 5 1 4 7 0 C22 11 560pF _ -= C12r 8 220pF L2 TK3001 3_ 7 26pH C C16 C14 39pF 1 r DETECTED .001 U PULSES C17 C29 R8 C19 R10 j R11 39pF T 4.7K 4.7K 01 Z C15 4.7K .01 Ì = L3 39pF TK3001 .26µH 39.16MHz TO IGNITION -1--0 CIRCUIT - +12V T, C 26 100 D2 K1 1N4004 12V CHANNEL A IGNITION. 16 R16 10K 15 04 U8 R12 R17 BS170 TO MMC148027P 10K 47K # HORN/LIGHT Usa 5 U5-I, 9`-T-a CIRCUIT 1/2 LM358N 1/2 LM358N 8 6 7 10 1 2 3 4 5 D3 -VN1-* K2 1N4004 1114 12V - 42.1K C28 R13 1% i C25 R15 .1 330K 05 47 R18 C27 ,1 } 221K BS170 .022 T 1% 10K CHANNEL R19 B 47K # 'LIGHTSMORN 74- Fig. 2. The superheterodyne receiver for the Car Security System, in addition to the MCI45027 programmable decoder U6 (the other half of the two -chip set), is composed of an NE602 double- balanced mixer (U2), followed by a combination high - gain intermediate - frequency (IF) amplifier and detector /amplifier circuit (1_13 and U4, respectively), and an LM358 dual op -amp. The signal is then fed through FILI to U4) includes an AM detector (which is the transmitted pulse train that con- the first stage of the IF section. The part of U4's internal circuitry) that is set tains the address and data informa- ceramic filter has a narrow bandpass for maximum gain -approximately tion, The output of U4 (a series of frequency centered on 10.7 MHz that 93 dB at 10.7 MHz. Two tuned circuits, negative -going modulation pulses) at passes the desired IF while attenuat- composed of L4/C22 and L5/C23, are pin 4 is fed to the decoder section of ing all other frequencies. set to 10.7 MHz by adjusting the induc- the receiver, through U5, the dual low - The IF section (comprised of U3 and tors. Integrated circuit U4 reproduces noise op -amp. www.americanradiohistory.comAmericanRadioHistory.Com Op -amp U5 -a (configured as a volt- output of U6 at pin 11 to control Q4 except for a small clearance around age follower) is used as a buffer be- and Kl. In that configuration, the relay each component lead that is not tied tween the output of U4 and the input will be energized only as long as the to the circuit ground. Figure 3B gives of U5 -b, which is operated without transmit button is held down. the locations of all holes that must be negative feedback allowing it to act cleared of copper. as a voltage comparator. An RC net- Transmitter Construction. In order Clearing the copper is easily ac- work composed of R12, R13, and C25 to ensure proper transmitter opera- complished with small, sharp drill bit controls the operation of U5 -b. tion, printed -circuit construction, using (about 316 inch in diameter). Simply The negative -going pulse train, at a double -sided printed- circuit board rotate the bit several times in each of the output of U5 -a at pin 1, riding on a is mandatory. Figure 3A is a full -size the holes that require clearance to DC voltage of about 5.5 volts, is fed to template of the foil side of the trans- remove sufficient copper from pin 6 of U5 -b. The voltage- divider ac- mitter's printed- circuit layout. The around the hole. That helps to avoid tion of R12 and R13 biases U5 -b to other side of the board is solid copper short circuits between the compo- ensure that its pin -7 output remains at zero volts at all times, except in the presence of the received pulse train. The negative -going output of U5 -a appears at pin 6 of U5 -b, but not at pin 5 because of the filtering action of C25. That causes the output of U5 -b at pin 7 to be a faithful, but inverted, reproduction of the negative -going detected pulses, the amplitude of which is raised to full Vdd level for a solid logic -1 /logic -0 representation of the encoded data. Integrated circuit U6 processes the pulse train, examining it for the correct address (00000). If the data stream is valid for Iwo consecutive cycles, data In the pulse train appears at U6 pins 15, 14, 13, and 12. Only pins 15 and 14 are used in this Iwo-channel system; k-- 1 7/16 INCHES pin 11 of U6 (not shown) can be used -I A B for an optional single channel push- button system. When the transmitted Fig. 3. The transmitter section of the system was assembled on a double -sided printed - signal stops, the data lines of U2 store circuit board. Copper is removed from only one side of the board the produce the the serves a plane (B). Copper is the last valid information received. circuit traces (A), the other side of board as ground then cleared from around the component -lead positions on the ground plane side to If an invalid transmission is received, prevent shorts. U6's data lines do not change from their original power -up condition (0000) or their status from a previously valid transmission. Two of the four data -output lines of U6 are used to HTRANSMIT control a pair of power relays. If any of 1 S1 1, the output data bits Is logic the cor- ANTI U1 C10 } responding transistor, Q4 or Q5, is bi- -C3- I ased on. That, in turn, activates the associated relay. The relay contacts -c6- are hard wired to the vehicle circuits R3 to be controlled, allowing them to be L1 K1 is activated or disabled. As shown, XTAL1 used to control the engine- ignition B1 circuit, while K2 is used to actuate the 'SEE TEXT ON horn or lighting circuit. S3 The unused data lines (pins 12 and OFF 13) of U6 can easily be used to provide DISABLE two additional control channels, by S2 adding additional transmitter switch- NORMAL ing at pins 9 and 10 of U1 (in Fig. 1). The Fig. 4. When assembling the transmitter, be sure that Ql, Q2, and Q3 are properly system can also be configured for sin - oriented, and that the wire connection for Q2's metal case is soldered to the ground 50 gle- channel operation by using the plane. Also, it is recommended that a socket be used for Ul. www.americanradiohistory.comAmericanRadioHistory.Com nent lead and the ground plane. Before proceeding to the receiver sided printed- circuit board. As with Warning!: Do not attempt this opera- assembly, examine the transmitter the transmitter board, the receiver's RF tion using a power drill; in doing so, board for shorts, opens, and cold sol- board uses the copper on the com- the bit could accidentally cut through der joints. It is much easier to correct ponent side of the board as a ground the entire board. If you choose not to any suspect joints at this time, rather plane. The holes around the compo- etch and drill your own boards, than later after discovering that your nent leads must be cleared of copper boards are available from the source circuit does not work. in a similar manner as was done to the specified in the Parts List. transmitter board. The holes that must Figure 4 is a parts -placement di- Receiver Construction. The re- be cleared are shown in Fig. 5B. agram for the transmitter's printed -cir- ceiver section of the project consists (Again, circuit boards are available cuit board. It is recommended that a of Iwo printed- circuit boards (RF and from the source given in the Parts List.) socket be used for U1. Be sure that Q1, digital), which should be housed in a Use a small drill bit, rotating it by hand, 02, and Q3 are properly oriented, single metal enclosure. As with the to remove a small amount of copper and make sure that the wire connec- transmitter, printed- circuit con- around each indicated hole location. tion for Q2's metal case is soldered to struction is mandatory for the re- Figure 6 is the parts -placement di- the ground plane. ceiver's RF section to ensure proper agram for the receiver's RF board. Component leads that connect to circuit operation. The digital part of Note that FILI is a 3-terminal bilateral ground should be soldered to both the receiver can be assembled on device that can be placed into the sides of the board to ensure a solid either single -sided printed- circuit circuit board in any direction. ground -plane circuit for those com- board or it can be hard -wired on perf- The layout for the receiver's single - ponents. On all other component board. sided digital board is shown in Fig. 7. leads, be sure that none is inadver- Figure 5A shows a full -size template Figure 8 is the parts -placement di- tently touching the copper on the of the foil side of the board for the agram for the digital board. It is component side of the board. The as- receiver's RF section. Note that like the strongly recommended that sockets sembled board can be housed in a transmitter board, the receiver's RF be used for all IC's. That allows easy small plastic enclosure, with S1 -S3 section is assembled on a double- troubleshooting should it ever be- mounted to the front panel as desir- ed. Switch S1 should be a normally- open pushbutton unit, while S2 and S3 can be single -pole double -throw slide or toggle switches, all of which should be labeled accordingly. Note: If the single -channel option, described under "Receiver Assembly" is chosen, S2 and S3 are not required: 3 15/16 INCHES in that case pins 6 and 7 of U1 should E A be tied to circuit ground. For the transmitter antenna, use a 36 -inch length of #20 insulated stranded wire. Drill a hole in the en- closure at an appropriate location to allow the antenna wire to exit. The wire can be conveniently wrapped around the enclosure when the trans- mitter is not in use, and can quickly be B stretched out when needed. Connect Fig. 5. The RF section of the receiver, like the transmitter, was assembled on a double - a 9 -volt battery connector to the sided printed- circuit board, with traces on one side of the board (A) and a ground board where indicated. plane on the other (B). J +12V C13 I C20 -R20- I C17 D1 C15 L3 -R7- f R9 -R11- FILI -- 1 C14 C16 TO ANT2 L4 C11 ) U2 U3 U4 J1' L5 C24 DETECTED -C21- I OUTPUT C12 L2 i C22 -R10- -C23- C29 -Á8- C19 'SEE TEXT 8 Fig. 6. Here is the parts -placement diagram for the receiver's RF board. Note that the RF board has one jumper wire, and that FILI is a 3- terminal bilateral device that can be placed into the circuit board in any direction. 51 www.americanradiohistory.comAmericanRadioHistory.Com PARTS LIST FOR THE RECEIVER SEMICONDUCTORS disc or mica U2- NE602AN double -balanced C24, C28- 0.l -µR ceramic -disc mixer, integrated circuit C25- 0.47 -µF mylar U3- MC1350P IF amplifier. C26- 100 -µR 50 -WVDC, radial -lead integrated circuit electrolytic U4-MC1330P IF amplifier /detector, C27- 0.022 -.tF, mylar integrated circuit ADDITIONAL PARTS AND dual op -amp, U5-LM358N MATERIALS integrated circuit ANT2- Antenna (see text) MC145027 programmable U6- FILL -10-MHz. IF filter (Toko. Digi- integrated circuit decoder, Key TK2306) Q4, Q5 -BS170 TMOS FET J1 -RCA phono or radio antenna 2 1/8 INCHES 10 1 -watt Zener Dl- IN4740A -volt, jack diode Fig. 7. The digital portion of the KI, K2 -12 -volt DPDT relay, PB 1N4004 1 -amp, 400 -PIV receiver was assembled on a single - D2, D3- type K10 (see text) diode sided, printed- circuit board, a full -size silicon rectifier L2. L3- 0.26 -µH inductor (Toko, template of which is shown here. RESISTORS Digi -Key TK300I) (All fixed resistors are 1/4-watt, 5% L4, L5- 0.422 -µH inductor (Toko, carbon units, unless otherwise Digi -Key TK3006) The interconnections between the noted.) PLI -RCA phono or radio -antenna two boards require only three wires; R7, R9- 220 -ohm plug + 12 volts, ground, and the connec- R8, R10, Rll, R20 -4700 -ohm Printed- circuit materials, enclosure, tion between U4 pin 3 and U5 pin 3. with line R12, R16, R18- 10,000 -ohm AC molded power plug Use stranded hookup wire for the con- battery holder and R13- 330,000 -ohm cord, battery(s), nections (solid wire tends to break). An R14-42,100 -ohm, 1/4-watt, 1 %, connector, wire, solder, hardware, RCA phono jack or antenna con- metal -film etc. nector is used for J1, which should be 221,000 -ohm, 1/4-watt, 1 %, R15- Note: The following items are -film mounted to the side of the enclosure. metal available from A. Caristi, 69 White 47,000 -ohm It's a good idea to connect a 6 posi- R17, R19- Pond Road, Waldwick, NJ 07463: tion (or more) terminal strip to the side CAPACITORS A set of three printed- circuit of the enclosure in order to allow easy C11 -47 -pF, NPO ceramic -disc or boards for $29.95; U1 -U6 for 6.75 wiring of 12 -volt, ground, and relay - mica each (specify part numbers); to the desired C12- 220 -pF NPO ceramic -disc or QI-Q6 for $3.75 each (specify part contact connections mica numbers); 49.86 -MHz, third - vehicular circuits. Make no connec- C13, C18-C20- 0.01 -1.LF, ceramic - overtone crystal (XTALI) for tions between the receiver and the disc $6.00; set of alignment tools for vehicle circuits at this time. C14, C21- 0.001 -KF, ceramic -disc $6.00. Add $5.00 postage and C15-C17- 39 -pF, NPO ceramic -disc handling to all orders. New Jersey Transmitter Tests and Adjust- or mica residents, please add appropriate ments. The transmitter should be 560 -pF NPO ceramic- sales tax. C22, C23- checked first, since it will be used for receiver alignment. If available, use a come necessary. Pay strict attention traces. Check the solder Joints; each triggered oscilloscope with at least a to the orientation of the IC's as well as should be shiny and smooth. Any 50 -MHz range for the transmitter and all other polarized components. The rough or dull blobs of solder indicate receiver adjustments, and to verify relays can be any 12 -volt DC units that cold solder joints and must be cor- proper operation. The only adjust- meet your application requirements. rected before proceeding. Just one ments required for the transmitter a -e slugs in T1, T2, and L1. That The author used two 10 -amp double - bad connection will prevent the re- the tuning ad- throw relays (see the Parts List) in his ceiver from operating. should be done with the proper prototype. The relays were cemented justment tool; the slugs are brittle and if the wrong in place using a small amount of sil- Receiver Enclosure. The receiver's can be easily damaged is used. icone RTV as an adhesive, and con- two boards must be housed in a metal sized tool The easiest way to adjust the trans- nected to the appropriate circuit - enclosure. Plastic enclosures are not board pads through hook -up wire, recommended since they offer no mitter is to build an RF pickup loop, 4 or 5 turns of wire, as Note: If single- channel operation is shielding from interference. Mount consisting of 9. The loop is connected selected, Q5, K2, and all related com- the two boards next to each other, shown in Fig. ponents can be omitted, and resistor using suitable hardware and spacers. to the scope probe as shown and to drive the vertical input of the R16 connected between U6 pin 11 (in- Be sure to locate the antenna input used the scope adjusted to dis- stead of pin 15) and the gate of Q4. (at the junction of C11 and C12) on the scope. With RF the tuning slugs are Once both of the receiver boards RF board close to one edge of the play the pulses, examine them very enclosure so that only a short length adjusted for maximum amplitude. are completed, in the carefully for solder bridges, especially of wire is needed between the RF Install a fresh 9 -volt battery out the antenna 52 between closely spaced copper board and the antenna jack. transmitter. Stretch www.americanradiohistory.comAmericanRadioHistory.Com RELAY overload, you might wish to have an +12v PLATFORM' assistant operate its control switches l TO as the receiver circuit is aligned. C24 IGNITION The receiver can be powered from 4,I } CIRCUIT a well -filtered, line- operated, DC -R16 O4 D2 power supply of between 12 and 15 K1' volts. An appropriate DC wall trans- R17 - former, filtered by an external 1000 -µF U6 -R18- -R19- 25 -WVDC electrolytic capacitor can C28- be used as the power source. The re- TO ceiver normally draws about 26 mA R14 -R15- HORN/LIGHT -R12- CIRCUIT with no relays energized. Because the receiver is very sen- D3 -R13- sitive, it can easily be overloaded by C27 K2" strong transmitter signals. For that rea- 1.15 C25 son, it is important to keep the signal to a level that will not overload the _J receiver during the alignment pro- 'SEE TEXT cess. The is O received signal strength DETECTED easily controlled by either of two PULSE INPUT methods; keep the transmitter a suffi- Fig. 8. When assembling the digital board (guided by this parts- placement diagram), cient distance from the receiver so as it is strongly recommended that sockets be used for all IC's. not to cause overloading, or by short- ening the transmitter antenna by coil- wire and place the pickup loop close PICKUP ing it and using a short length of wire to the antenna. Turn transmitter on by LOOP (about 6 or 12 inches) for the receiver pressing and holding S1. The position antenna. of S2 and S3 is not important at this As with the transmitter, a triggered time. Set the scope for a sweep of 1 oscilloscope should be used for re- ms /cm and maximum vertical gain. ceiver alignment. A digital voltmeter Fig. 9. To the transmitter, the Adjust T1 until RF pulses appear in the adjust will come in handy to troubleshootthe author assembled an RF pickup loop, display, and then tweak T1 for max- circuit, should that become neces- consisting of 4 or 5 turns of wire, and imum peak -to -peak pulse amplitude. sary. connected the loop to the scope probe in Adjust the slugs in T2 and L1 for the order to feed the transmitted signal to Apply power to both the receiver maximum possible vertical amplitude the scope's vertical input. and the transmitter, and then check of the displayed pulses a display of pin 7 of U2 for the local- oscillator sig- 20 mV peak-to -peak or greater, de- transmitter for value and location. As- nal, which should be 39 MHz with an pending upon the coupling between certain whether all grounded leads amplitude of about 0.2 -volts peak -to- the antenna and pickup loop, is to be are properly soldered to the ground peak. Examine the RF signal at pin 8 of expected. Readjust T1, T2, and L1 for plane, and that no other leads are U3, which should be a 10.7 -MHz RF maximum pulse amplitude. It is best to shorted to ground. If possible, try an- pulse train with an amplitude of about use as little coupling as possible be- other crystal and Q1. 80 -mV peak -to -peak, depending on tween the antenna and pickup loop. If the scope shows some RF but no the strength of the received signal. If there is no evidence of RF Q1 may pulses are present, U1 may not be op- Very carefully adjust L2-L4 for max- not be oscillating. It is important to erating. Check pin 15 of U1 with the imum signal amplitude, using the note that the circuit will not oscillate if scope to confirm the presence of the proper alignment tools. If necessary, the parallel resonant tuned circuit encoded pulse train, which consists of separate the transmitter from the re- (composed of T1's primary and C3) is positive pulses of about 8 or 9 volts in ceiver as far as possible to simulate a not set close to the operating fre- amplitude. If absent, check the orien- weak signal, consistent with a solid quency, 49.86 MHz, of the crystal. Be tation of U1 and Q3. Check all wiring pulse display at U3 pin 8. That permits sure that the value of C3 is correct as and components associated with U1. the most accurate adjustment. specified in the Parts List. If all else fails, try another chip. Next, examine the output of U4 at If the tuned circuit is okay, measure pin 4 for negative -going pulses riding the battery voltage under load to be Receiver Checkout. Checking and on a DC level of about 5.5 volts, which sure that it is delivering at least 8 volts aligning the receiver requires that the is a reproduction of the pulse -train to the circuit. Check the current draw transmitter be used as a signal source. output of the transmitter encoder. Ad- of the circuit; it should be about 7 mA. Be sure that the transmitter is fully op- just L5 for maximum pulse amplitude. Check the orientation of Q1, Q2, and erational and is powered from a fresh As before, it may be necessary to sep- Q3 carefully, and be sure that each of battery before attempting any re- arate the transmitter and receiver fur- those transistors are properly oriented ceiver adjustments. Since the trans- ther than before to simulate a weak in their respective locations. mitter should be operated at some signal in order to perform the adjust- Check all other components of the distance from the receiver to avoid ment. 53 www.americanradiohistory.comAmericanRadioHistory.Com ANTENNA evident after performing the above (ANT 2) checkout procedure by noting where the proper flow of RF and pulse signals PLATE ANTENNA MOUNTING TO IGN CKT stops. Very carefully examine any part of the receiver circuit that does not d respond to the transmitter signal for TO HORN/LIGHTS CKT proper IC orientation and compo- nent placement. Be sure all grounded TO component leads are soldered to the cry' +12V " ground plane, and that all others are DC S4 F1 1/2 AMP RECEIVER isolated from it. Refer to the schematic POWER diagram and use a digital voltmeter where Fig. 10. The ideal location to stash the receiver is in the trunk of the vehicle, it or scope to measure Vdd and other a fuse. A separate switch (which can be powered by the vehicle battery through /ramp voltages at each chip terminal. If al we'll can be added to allow the circuit to be switched off when not needed. call S4) appears normal, try a new chip in the defective section. VEHICLE TO IGNITION COIL IGNITION OR DISTRIBUTOR Final Receiver Adjustment. Before MODULE EXISTING installing the receiver in a vehicle, you VEHICLE Î IGNITION might want to make a final adjust- SWITCH BATTERY ment to L2 (in the receiver's antenna - tuning circuit), using the actual anten- I K1 A na that is mounted to the vehicle. That will allow you to make sure that you have the greatest possible range for VEHICLE the remote control system. BATTERY HORN Apply 12 -volt DC power to the re- HORN ceiver. Have an assistant operate the RELAY I transmitter as he or she walks away from the vehicle. By monitoring pin 11 of U6 with a DVM, you'll be able to determine the effective operating B range of the system. A logic 1 ( +12 volts DC) at pin 11 indicates that the receiver is responding to the transmit- HEADLAMPS ted signal. When the voltage goes to FUSE OR OTHER zero, the transmitter is out of range. VEHICLE LIGHTS BATTERY Inductor L2 can then be adjusted Z very slightly to bring in the signal. Re- peat the procedure until maximum C operating range is achieved. The au- Fig. 11. Here are three typical circuit applications that the car security system can be thor's prototype has an operating used in. The sketch in A illustrates how the circuit can be used to disable the vehicle; in The B shows how to hook -up the circuit to sound the horn (a welcome feature in emergency range excess of 400 feet. Note: situations); and C shows how the circuit might be used to flash the vehicle's headlamps transmitter must be located at least (perhaps, to frighten a car thief or to help locate your car in a large crowded parking 50 feet away to avoid receiver over- lot). load. Check pin 9 of U6 for a positive - duce a logic -1 condition at pins 15 Installation. The ideal location for going pulse train with an amplitude of and 14 of U6 and, in turn, activate the receiver installation is in the trunk of about 12 volts. Check pin 11 of U6 for a relays. the vehicle. Refer to Fig. 10. The re- logic -1 condition, indicating that the With transmitter power on, S2 and ceiver should be powered by the ve- decoder is responding to the en- S3 can be alternately set to each po- hicle battery through a 1/2-amp fuse coded pulse train. The operation of K1 sition, which will operate and release and a separate switch (which we'll and K2 can be checked by using S2 the relays. If the receiver performs as call S4). The fuse will protect the circuit, and S3 in the transmitter to set the described, the only remaining adjust- while the switch will allow the receiver logic output levels of U6 at pins 15 and ment to be performed is on L2, which to be disabled. The receiver draws 14. When S2 and S3 are set to the should be checked when the receiver only about 26 mA, so it can be left on NORMAL and OFF positions, respectively, is connected to its vehicular antenna. for extended periods without deplet- the logic level at pins 15 and 14 should That can be done later, when the ing the battery. remain at zero and the relays should range of the system is checked. Figure 11 illustrates three typical cir- be dormant. Placing S3 and S3 in the If the receiver does not operate cuits that may be used to disable the 54 DISABLE and ON positions should pro- properly, the section at fault will be (Continued on page 94) www.americanradiohistory.comAmericanRadioHistory.Com GROUND the ZERO: other End of the Radio Spectrum Join us for a guided tour through the relatively unknown, low -tech, low - frequency end of the electromagnetic spectrum. Karl T. Thurber, Jr. Must higher always be better? While today's technological imperatives appear to dic- tate the increased exploration and use of ever- higher operating frequen- cies, there continues to be considera- ble interest in the low end of the e ectromagnetic spectrum. This article explores the end of the l frequency spectrum that lies well be- low the standard AM broadcast band. We'll survey the spectrum and cover Icngwave (LW) radio pioneering, LW- band inhabitants and users, the 1750 - meter experimenters band, LW prop- agation characteristics, receiving equipment, and antennas. Longwave Characteristics. Let's see just where LW frequencies fit into the electromagnetic spectrum as a whole. The total usable spectrum generally is considered to extend from a few hertz (Hz) to approximately 300 gigahertz (GHz). This truly immen- se range of frequencies is broken up into smaller groupings that are easier to understand and deal with con- ceptually. The lowest range is the group of frequencies known as the ultra low frequencies (ULF), from zero to 3 Hz. Just above ULE lie the extremely low frequencies (ELF); they cover 3 Hz to 3 kHz. Above that, from 3 to 30 kHz, are the very low frequencies (VLF). Next come the low frequencies (LF), from 30 to 300 kHz, the 'top end" of what 55 www.americanradiohistory.comAmericanRadioHistory.Com are generally considered the long - noise, especially from household and waves (although some consider any- industrial appliances and household thing below the broadcast band to light dimmers, also affects LW more be LW). than the higher frequencies. About How do signals propagate at the the only receiving -end remedy to the low frequencies? There's no blanket noise problem (other than carefully answer to this question because locating antennas away from power much depends on just how low the lines and buildings) is to use a direc- frequencies are. At the high end of the tive, noise -canceling antenna such as LW region, propagation isn't too much a loop (more on that later). different from that of the AM broad- cast band. Daytime propagation is The Palomar Engineers VLF Converter Radio Pioneering on the Long - limited to groundwave (100 miles or lets you enter the world of VLF radio for waves. Much of the pioneering work so), but nightfall can extend coverage about $80; all you need is a in radio communications was per- communications receiver and an to several thousand miles. formed on LW In fact, for a long time, antenna. Covering the range 10 to 500 There are several reasons why LW the popular view was that the higher kHz, the Model VLF -A converts VLF signals propagate as they do. The frequencies, at least the "shortwaves" signals to the 80 -meter amateur band, re- ionosphere, the highly charged while the Model VLF -S converts the lying well above the AM broadcast gion of the earth's atmosphere that signals to 4010-4500 kHz for use with band, were essentially useless. The in- extends from 30 to 250 miles above general- coverage shortwave receivers. tensive use of LW during radio's infan- the surface, acts like a duct for LW (Photo courtesy of Palomar Engineers.) cy can largely be explained by the signals. Although medium- and high - technology of the times. It was much frequency signals tend to be ab- earth and follows its curvature. The easier to generate substantial sorbed by the lower layers of the lowest frequencies can easily travel amounts of radio- frequency (RF) radi- ionosphere and by the earth, LW sig- halfway around the world, and even ation at such wavelengths than at nals are absorbed much less. penetrate a short distance beneath higher frequencies. The reflectivity of the ionosphere the ocean's surface. Long -wave frequencies were in with respect to LW tends to remain There is some skywave propagation vogue until the early 1920's, when ra- fairly constant, making long- distance on LW. As frequencies increase and dio amateurs went to higher frequen- communications on LW more stable approach the medium -wave fre- cies to escape the murderous than those on higher frequencies on quencies (around 300 kHz), skywave interference from high -power, com- an hourly, daily, and seasonal basis. propagation becomes more com- mercial, point -to- point, and broad- This is one reason why LW broadcast- mon, especially at night. As evidence cast stations, and especially from ing is so popular in many parts of the of that, signals fade at great distances stations still using broad spark -gap world: stations operating on LW can from the transmitter site. transmitters. Those radio amateurs, or be heard coming through remarka- During the daytime, the low fre- "hams," made an amazing disdovery: bly "loud and clear" day or night, quencies tend to be slightly reflected the higher the operating frequency, every day of the year. from the D or lowest layer of the the greater the communications For a given transmitter power, ionosphere. At night, the D and E range. When the word got out, most groundwave range is much greater layers mostly disappear, so absorption hams joined the exodus to the higher on the longer wavelengths. At the of radio signals decreases. Signals frequencies. lowest frequencies, range can be can then be reflected back to earth Long -wave use went into a decline global in scope. To benefit from LW DX from the highest ionospheric F layers that only began to reverse after World possibilities, however, transmitter as skywave or skip signals. Because of War II. Long wave's recent renais- power must be high and antennas phase differences, the skywave tends sance is due in large part to impor- large. At the lowest frequencies, very to destructively interfere with the tant propagation characteristics that long antennas may be run between groundwave if both are incident upon actually make it superior to higher fre- mountains or even buried in the earth. the receiving antenna. That causes quencies for some applications such During the daytime, LW propaga- "jitter" in reception. At the lower LW as radiolocation, military and emer- tion is almost exclusively by ground frequencies, skywave propagation gency communications, and very Z waves traveling close to the surface of and the attendant phasing effect be- precise timekeeping, frequency the earth. Over land paths, maximum come less and less pronounced. measurement, and dissemination. 8 distances are reduced by absorption Those characteristics make for gener- Today, the LW part of the spectrum 6- caused by ohmic resistance of the ally superb, rock -steady signal recep- offers current reports on weather and 1 ground. This is much less of a problem, tion uncommon in medium -wave flying conditions, Morse -code prac- ° however, than it is at the higher fre- and HF communications. tice, DX reception, and more. The re- quencies. There is an important limiting factor gion is populated by signals from time As the frequency decreases, say to in LW communications: atmospheric and standard -frequency stations, for- 100 kHz or less, signals propagate in noise or QRN. High noise levels plague eign broadcasters, military installa- duct -like or waveguide fashion. The LW, with the tropical regions-where tions, unlicensed (but legal) experi- groundwave travels over greatly ex- thunderstorm static can be horren- menters, weather and navigation 56 tended distances because it hugs the dous -being the worst. Man -made beacons, radioteletype stations, www.americanradiohistory.comAmericanRadioHistory.Com radiolocation systems, and a host of strange and unusual "signals." Let's look at all these in detail. Beacons and Weather Stations. Some of the most common LW sta- tions are navigational aids, or radio beacons, found between 190 and 410 kHz and 510-535 kHz. Some are aero- nautical beacons, others are marine. Both use very slow, amplitude -modu- lated (AM) Morse code, and identify continuously, making them easy to ID. Both are a source of DX, especially at night, although most are low powered with a daytime range of around 200 miles. The marine beacons usually trans- mit their call signs continuously in an omnidirectional pattern. Sometimes, the call sign, usually consisting of from two to four letters or numerals, is sepa- rated by several dashes. Marine -navi- galion beacons are in for changes - the Coast Guard is decommissioning and reorganizing them. Many now transmit coded Digital Global Posi- tioning System (DGPS) information that allows the user to remove the "dithering" error encoded in GPS sat- Palomar Engineers offers an all- purpose amplified loop -antenna system that lets you ellite signals. Within the beacon's DX the LW bands from your kitchen table. The LA -I Loop Amplifier ($99.95) can be range, it allows full -accuracy resolu- used with any of six plug -in loops, each costing $89.95. (Photo courtesy of Palomar tion from GPS. Engineers.) Years ago, the mainstay of aero- navigation was the LW radio range tion. Most operate with low power, Standards and Technology (NIST)? The system. Small, low-power transmitters making for interesting and challeng- frequencies are favored because of located at or near airports formed a ing DX catches. the improvement in received -signal network of electronic -range patterns A good way to update your knowl- accuracy that's possible. At low fre- enabling aircraft to home in on them. edge of beacon stations is with Ken quencies, reception doesn't suffer the Although not being decommissioned, Stryker's Aero /Marine Beacon Guide, slight time delays and unpredictable these stations now are largely super- available through the Longwave Club atmospheric variations that distort seded by elements of the more so- of America (see the boxed text en- regular reception of the popular Col- phisticated VHF Omnirange (VOR) titled "Names and Numbers" for their orado "time ticker" WWV and its and Tactical Aid to Navigation (TAC- address). His timely guide mainly Hawaiian counterpart, WWVH. AN) aeronavigation systems that op- deals with radio beacons, but does list While most users aren't concerned erate on VHF and UHF. the Groundwave Emergency Network with those problems, such potential Aeronautical beacons are still im- (GWEN) -which we'll cover shortly- reception errors make some labora- portant aircraft direction- finding aids and other beacon -like stations. tory applications impossible when the in remote areas of the United States labs are located far from the transmit- and Canada, and in other parts of the Time and Frequency Standards. ter sites. Both LF and VLF waves travel world. The stations transmit a com- Over the past few years, LW has be- almost completely by groundwave, bination "A -N" signal in a four -leaf pat- come a popular source of channels making reception rock -steady, almost tern, identifying themselves every 30 for accurate time -and -frequency totally eliminating such problems. seconds. They use two pair of anten- standard stations. About a half -dozen For those reasons, many of the stan- nas to obtain the desired four-leaf ra- such stations around the world now dards- setting agencies that provide diation pattern. broadcast highly accurate marker such services have set up LW stations. You should be able to hear at least signals 24 hours a day, mostly on fre- One of the first broadcast -time ser- one or two beacons almost anywhere quencies below 100 kHz. vices, provided by British station GBR, in the United States or southern Cana- Why are such low frequencies used was instituted in 1926 and was report- da. But note that these stations use for time- and -frequency standard sta- edly the world's most powerful radio "identifiers" rather than regular call tions, including those operated by the station. Its 16 -kHz signal was, and is, letters to tie in the ID with station loca- government's National Institute of widely received in the United States. 57 www.americanradiohistory.comAmericanRadioHistory.Com Today, with the proper receiving LW Broadcasters. The 150 -285 -kHz and decoding equipment, you can band is still a popular AM broadcast obtain accurate time and frequency band in Europe, Africa, and some information from NIST station WWVB, parts of Asia. In those regions, broad- located in Ft. Collins, CO. WWVB trans- casters typically use super -high- mits on 60 kHz and can be heard in power transmitters and very large an- almost all parts of the country. tennas to make transmitted signals as strong as possible. As a result, station Radio Location. The stability and range is usually much greater than range capability of LW propagation that on the medium -wave AM- broad- has made it very useful for radio -loca- cast band. tion services such as LORAN and There are few LW broadcast enthu- OMEGA. These signals are mostly siasts in this country, although many found in the range of 10 to 14 kHz and Americans were exposed to LW around 100 kHz. None of the transmit- broadcasting during service in World ters associated with those systems War II and the postwar occupation. broadcasts a recognizable identifica- While they were overseas, they dis- tion, but you can hardly miss their dis- covered the many good musical pro- tinctive signals. grams that Europeans could tune in LORAN -C is an advanced version of on LW over long distances. LORAN -A, an obsolete service that Also, most shortwave- listener (SWL) once shared the 160 -meter band with clubs don't pay attention to LW DX'ing. radio amateurs. The LORAN -C system That is primarily because few popular is used by ships and planes to accu- receivers cover LW and it's also tough rately determine their position any- to pull the broadcasters through the where in the coverage area -18- heavy interference from the many million square miles! LORAN -C can tell beacon stations found in the Western you where you are, with 1/4-mile ac- Hemisphere. curacy, and let you return to within 50 to 300 feet of the same spot. It oper- The MFJ -1022 is a popular active Military Uses. Since longwave sig- ates continuously, regardless of antenna that has good gain, low noise, nals follow the curvature of the eartn weather, and it's accurate, depend- and broad frequency coverage to include over vast distances, they are well -suit- able, and cost-effective. LORAN -C is much of the LW spectrum. The unit ed for the ultra -reliable, worldwide heavily used by charter boaters, mer- covers 50 kHz to 30 MHz and has both a communications that the military re- gain control and a 20 -dB attenuator. The chant mariners, and commercial fish- quires. The Navy is particularly inte'- control unit operates from 12 VDC, and ermen. ested in LW because it offers reliable the remote unit has a 54 -inch whip and -C in communications with submerged LORAN transmitters operate comes with 50 ft. of coaxial cable. It's chains, sending out pulsed 100 -kHz $129.95. (Photo courtesy of MFJ submarines, something not possible signals. A special receiver measures Enterprises.) on higher frequencies. Tuning around the slight difference in time between LW you'll hear naval call signs on both the arrival of signals from a pair of gan operation in the late 1960's. It CW and radioteletype (RTTY). Thus, transmitters spaced hundreds of miles works somewhat like LORAN, but oper- the Navy operates very- high -power apart. This time difference, in microse- ates between 10 and 14 kHz. That re- stations in far -flung locations, notably conds, is read off a display in the re- gion is more stable from a propaga- in Washington and Maine. Those sta- ceiver and correlated with a curved tion standpoint than the somewhat tions enable the Navy to maintain de- "line of position" (LOP) on a LORAN -C higher frequencies used by LORAN -C. pendable, worldwide communica- chart. The receiver is then tuned to a The longer wavelengths OMEGA uses tions almost unaffected by propaga- different pair of transmitters and a are, to some extent, able to penetrate tion conditions and solar activity. second time difference is deter- water, making it possible for sub- Two of the most interesting military mined. That is correlated with a sec- merged submarines to determine LW inhabitants are GWEN and Project ond curved LOP and the intersection their positions. OMEGA'S range is more ELF The Ground Wave Emergency of the two LOP's is your location. than 8000 miles, and so is greater Network (GWEN) is a wide -ranging Those who merely want to tune in a than that of LORAN -C. A network of system of LF -radio towers and sites LORAN -C transmitter and hear what only eight stations covers the entire that constitute an emergency net- one sounds like can use any standard world. work to provide communications in communications receiver that tunes You can hardly miss the strange- the event of a nuclear attack. The sys- to 100 kHz. LORAN -C transmitters oper- sounding OMEGA signals, which are tem is intended to overcome nuclear - ate on that frequency and can be still beeping away on 10-14 kHz. How- caused electromagnetic pulse (EMP) readily identified by their charac- ever, there is a possibility of some sta- effects, relaying teletype messages teristic pulsating sound. tions shutting down in coming years and linking strategic alerting sensors On even longer wavelengths is the now that Global Positioning System such as long -range warning radars. 58 OMEGA navigation system, which be- (GPS) satellites are active. GWEN is designed to make sure that www.americanradiohistory.comAmericanRadioHistory.Com nuclear blasts don't prevent attack quirements. First, the power input to of ham calls on nonamateur frequen- warning messages from reaching the the final amplifier must not exceed cies, many use either their initials, or President or obstruct his ability to re- one watt. Second, all emissions below old -style telegraphers' "sines." Some taliate. 160 kHz or above 190 kHz (in other use their nicknames as ID's. A number The typical GWEN antenna site is on words, outside the 1750 -meter band) of 1750 -meter enthusiasts also oper- an 11 -acre plot and contains the tow- must be suppressed by at least 20 dB. ate their own home -style LW- beacon er, fences, and three shelters that hold Third, the length of the antenna, trans- stations within the 160- 190 -kHz an antenna tuner, radio /data pro- mission line, and ground lead com- band -there's a partial list of these cessor, and emergency power supply. bined can't exceed 50 feet (15.2 home -brew beacon stations in an ar- About a foot below ground is a large meters). These FCC restrictions make ticle by Steve Ford, WBBIMY, which ap- "wheel" of copper wire radiating from operating challenging. Fortunately, peared in October 1993 issue of QST the base of the antenna. The 2- to 3- there are no stipulations as to the type Working on 1750 can be a refresh- kW stations operate on frequencies of emission that can be used; SSB, AM, ing change, but be prepared to do between 150 and 175 kHz. The signals FM, RTTY, or CW are all acceptable. some experimenting. To learn if there are short bursts of digital information The same goes for receiving anten- are any 1750 -meter beacons active that many listeners describe as "ear - nas, on which there are absolutely no in your area, listen on 160 to 190 kHz, shattering." restrictions as to size and type. especially at night and on the week- Operating at much lower frequen- Low -frequency experimental radio ends around 189.5 kHz (see the side- cies than GWEN, Project ELF is a gigan- stations (or LowFERS) have a great bar entitled "Low And Medium tic ELF system for reliably commu- time trying to work other stations oper- Frequency Scrapbook "). nicating with (or at least transmitting ating under the same severe power Despite all the problems associ- to) submerged submarines at depths and antenna restrictions. While signals ated with operation on 1750 meters, if of up to 400 feet. The system report- from aeronautical beacons, which you listen in on LW long enough, you're edly transmits on a bottom -hugging may run several- hundred watts, have likely to want to communicate on the 76 Hz, and uses antennas more than been received as far away as 1000 low frequencies. For the experimen- 50 miles long. Few details are avail- miles or so, amateur DX contacts on tally inclined, working on 1750 is much able about the system and its exact 1750 meters of 150 miles are unusual. like communicating in the early days purposes due to its highly classified GWEN's presence has forced most of "spark." Too, with the increasing in- nature. In any case, Project ELF is activity above 175 kHz, and most terest on the 1750 -meter band, the strongly protested by environmen- 1750 -meter action has been cen- American Radio Relay League (ARRL), talists and others opposed to building tered near 189.5 kHz. Most work to which represents amateur radio inter- the system at two huge sites in Michi- date has been on CW, though ad- ests, has approached the govern- gan's Upper Peninsula and in Wiscon- vanced digital modes using slow ment regarding a shared amateur sin. phase -shift keying and coherent radio band in the 190 -kHz region. Re- There are many other stations methods are being tried. portedly, the proposal has been found on LW including Morse and Because the FCC frowns on the use favorably received by the FCC and RTTY stations operated by news ser- vices. As we'll see, too, there's also a sort of "wannabe" ham band down there, the so- called 1750 -meter ex- perimenters' band. There are also a number of what we will refer to as "strange longwave bedfellows" that can be heard as well. Let's look at some of those other LW spectrum in- habitants. The 1750 -Meter Experimenters' Band. Since 1950, a small but enthusi- astic group of experimenters has been communicating on an almost totally unknown, license -free band. That so- called "1750 -meter band," occupies 1874 to 1578 meters (160 to 190 kHz). Actually it isn't a ham band at all. Rather, this 30 -kHz LW chunk was allocated by the Federal Communi- cations Commission (FCC) in 1950 for The British AD -170 Datong compact, indoor -antenna system sports wideband coverage limited -radiation device use. No op- from 60 kHz to 70 MHz, making it suitable for LW use. The antenna system is erator or station license is required. compact, requiring only a 3 -meter horizontal space. A newer but similar model, the The FCC rules governing this type of AD -270, is available from Gilfer Shortwave. (Photo courtesy of Datong Electronics, operation set forth some tough re- Ltd.) 59 www.americanradiohistory.comAmericanRadioHistory.Com other government agencies who book, The Handbook of Solar Flare must approve it. Monitoring and Propagation Fore- Low- and Medium-Frequency casting, by Carl M. Chernan. However, Strange Longwave Bedfellows. Scrapbook it appears to be out of print, so you Parts of the Extremely Low Frequency may have to do some searching for it. Those hobbyists who focus on the so- (ELF) and Very Low Frequency (VLF) called FCC Part 15 bands (160 to 190 from 0.05 Earthquake Monitoring. An even spectra-especially about kHz and 510 to 1705 kHz) are frequently more interesting, and certainly more to 11 kHz -are replete with various known as LowFERS (short for Low Fre- "natural radio emissions." Most of quency Experimental Radio Station) or speculative field one whose validity them are created by the interaction MedFERS (those who experiment on is questioned by many authorities- respec- of thunderstorms with the earth's the medium -frequency bands), involves monitoring the ELF VLF and LF tively. These terms reportedly were co- You ranges for electromagnetic radiation ionosphere and magnetic field. ined years ago by LW experimenter Ken can't get away from those "emissions": Cornell, W2IMB, who has for many that may be caused by earthquake there are nearly 2000 such storms in years operated the LW beacon station precursors. Both professionals and progress worldwide at any given time, "KEN" on 187.5 kHz. amateur experimenters alike are Cornell has published the Low and 1- million heavily involved with intriguing ac- and each day more than Medium Frequency Scrapbook for tivities along these lines. lightning strokes are generated. years. Presently it's a 107 -page com- There's little commercial or govern- pendium of information on these inter- Reportedly, a west -coast experi- ment activity in this oh -so -low outpost esting bands, dedicated to the radio menter who operates an earth- scrapbook provides of the electromagnetic spectrum. experimenter. The quake- detection network noted ra- basic low frequency information and dio and magnetic anomalies on However, in this lonely area, you may equipment designs for both reception hear all sorts of naturally occurring and transmission. The book has a very Saturday, January 15, 1994, two days emissions, notably 'Whistlers," one of useful introduction for would -be prior to the big Southern California radio's oldest mysteries. beacon operators, an introduction to earthquake that caused so much the 1750 -meter band, and several re- Some have described whistlers as damage in the region. The experi- source lists. menter reportedly predicted an im- "sounds" descending in pitch, like fall- The latest (8th) edition is the 20th - ing musical notes. Related naturally anniversary Scrapbook, available for minent quake exceeding 6 on the occurring emissions include the so- $17.50 postpaid book rate or $18.75 via Richter scale. should be pay- called "dawn chorus" that resembles first class mail, Checks For those interested in this type of able to Ken Cornell, 225 Baltimore Ave., information and experimentation, a birds chirping or frogs croaking. Other Point Pleasant Beach, NJ 08742; Tel. The aurally close relatives include strange 908- 899 -1664. monthly publication, Geo- sounds known as "risers' and "hooks," Monitor, covers earthquake activities plus other hissing, rushing, and blow- worldwide and contains many de- ing sounds. There's also the familiar scriptions of electronic equipment for crackling and popping sounds from heard a few seconds after the light- earthquake precursors. The newslet- electrical storms. ning stroke's familiar "pop." ter covers amateur and scientific As we suggested, these sounds If you're intrigued by this specialized earthquake prediction, amateur have their origins in ionizing electrical phenomenon, The LOWDOWN, the geophysical monitoring, speleo- emissions in and from the earth's Longwave Club of America (LWCA's) logical (cave -exploring) interests, and magnetosphere. They emanate from newsletter (see the sidebar entitled even theories and legends about lightning discharges and the elec- "The Longwave Club of America ") earthquakes, including animal be- tromagnetic pulses (EMP) they create. features a monthly column of natural havior prior to earthquake episodes. Reportedly, the lightning discharges radio news. The columnist, Michael Published by Vincent T. Migliore, a sub- disturb the earth's magnetic field, Mideke, offers his Whistler Hunter's scription is $22 /year domestic and which results in the generation of Guide for $6; a companion au- $30 overseas airmail. electromagnetic signals. Many such diotape, Introduction to Natural Ra- sounds can be heard on LW receivers dio, is $10, Receivers. To most radio buffs, LW is and sometimes even on long, high - unknown territory. One reason for this gain audio lines. Solar -Flare Monitoring. The use of has been the lack of commercially This unusual energy can be elec- the ELEVLE and LF regions for monitor- available, high -performance low -fre- trically ducted and even amplified ing solar flares and their effects on quency receiving gear. Now, several within the earth's magnetosphere, radio propagation is an interesting suppliers are producing receivers, re- traveling from one hemisphere and field, one that's wide open for experi- ceiving converters, and compact an- polar area to the other; researchers mentation. By monitoring such LW fre- tennas that make it possible to call this phenomenon dispersion. The quencies, it's possible to observe such explore the lower reaches of the phenomenon helps to explain whis- specialized solar -related phe- spectrum. tlers, since the higher frequencies nomena as Sudden Ionospheric Dis- Another avenue is military surplus. A tend to arrive progressively before the turbances (or SID's), Sudden Enhance- fairly large number of surplus re- lower frequencies as the emission ment of Signals (SES's), and Sudden ceivers tune down to 150 kHz or so, but tens of kilohertz. travels within a duct. The result is the Enhancement of Atmospherics (SEA's). few reach into the downward -sweeping whistlers heard More information on this rather eso- Many surplus receivers require restor- in on sensitive equipment. Whistlers are teric subject can be found in the TAB ation if they are to be put back www.americanradiohistory.comAmericanRadioHistory.Com Among the suitable surplus re- Names and Numbers ceivers are the BC -453, BC- 1206 -A, The Longwave Club of America BC -348, ARB, and RAK-7. If you want to (LWCA) Ken Cornell tune down to 10 or 20 kHz, some sur- Since 1974, longwave listeners 225 Baltimore Ave. plus receivers to consider are the Point Pleasant Beach, NJ 08742 (LWL's) and other low -band enthusiasts Tel. 908 -899 -1664 R -439, URM41, RBA, RBI, and R-389 have-had a forum in the Longwave Club URR. The latter receiver, made for the of America (LWCA). The LWCA was or- Curry Communications government by Collins Radio in the ganized in 1974 to promote LW DX'ing, 737 North Fairview St. experimenting on frequencies below 1950's, is an excellent receiver whose Burbank, CA 91505 530 kHz, and activity on the 1750-meter Tel. 818 -846 -0617 coverage extends to VLF. band. The Electronic Equipment Bank LW bands are also covered by a The association, which has about 500 323 Mill St. N.E. few older commercial communica- members, publishes The LOWDOWN, a Vienna, VA 22180 tions receivers that you might find on newsletter for LW enthusiasts. It's a Tel. 800-368-3270 monthly that contains up -to -date log - used -equipment racks or at hamfests. gings, beacon station information, Geo-Monitor In the low price range are the Heathkit LowFER and MedFER activities, and 65 Washington St. DF -2, Hammarlund RDF -10, and Na- equipment designs for both reception Suite 400 tional NC -66. and transmission. There are several ac- Santa Clara, CA 95050 There also are several general tive columns and features that include Tel. 408-749-6770 beacons, LW loggings, the 1750-meter coverage receivers that you should band, and interest pursuits Gilfer Shortwave special- consider. One is the Drake SPR -4 that such as earthquake precursors. 52 Park Avenue Membership in the LWCA and a one - Park Ridge, NJ 07656 covers 150 kHz to 30 MHz, which sold year subscription to The LOWDOWN is Tel. 800 -445 -3371 for about $ 700 when new. The Ken - $18 in the US, $19 in Canada, and $26 wood R -300, $300, is within Grove Enterprises originally by airmail delivery overseas. All remit- PO Box 98 the reach of most who would like to tances must be in US funds. Mem- 300 South Highway 64 West DX LW bands. It tunes down to 170 kHz. bership information is available from Brasstown, NC 28902 -0098 Another possibility is Radio Shack's Re- publisher Bill Oliver at The Longwave Tel. 800 -438 -8155 Club of America, 45 Wildflower Rd., alistic DX -300. Levittown, PA 19057; Tel. 215- 945 -0543. LF Engineering Co., Inc. Moving upscale, the 1950's- vintage 17 Jeffry Road National HRO -60 is an excellent gen- East Haven, CT 06513 eral- coverage and ham -band re- Tel. 203 -248 -6816 ceiver. With its accessory G, H, and J tery- operated receiver contains a S.P. McGreevy Productions plug -in coil sets, the receiver will tune proprietary circuit to receive emis- 45 Elda Drive to kHz. The sions a 33 San Rafael, CA 94903 down 50 Hammarlund VLF using -inch telescoping Super Pro, also known as the SP -600- whip. The unit has an audio output for MFJ Enterprises, Inc. VLF tunes as low as 10 kHz. stereo headphones. It costs $65 and Box 494 Mississippi State, MS 39762 There are some very nice new LW- includes a seven -page listening and capable units on the market, too, operating guide. A 30- minute dem- Michael Mideke PO Box 123 though they tend to be expensive. As onstration audiocassette of natural San Simeon, CA 93452 -0123 examples, the Watkins- Johnson radio sounds is $8. HF1000 (about $3800); Drake R -8 Palomar Engineers P.O. Box 462222 ($960); AOR 3030 ($800); Japan Radio Converters and Accesories. Escondido, CA 92046 NRD -525 ($900) and NRD -535D There's another, often much less ex- Tel. 619 -747 -3343 ($1700); Kenwood R -2000 ($670) and pensive, way to get started with LW OST R -5000 ($1000); ICOM R -71A ($1040) listening: buy a VLF /LF frequency con- 225 Main St. and R-1000 ($5000); Yaesu FRG -100B verter and hook it up to your present Newington, CT 06111 -1494 ($560) and FRG -8800 ($700); and the communications receiver. Tel. 203 -666 -1541 Lowe HF -150 ($700), HF -225 ($850), The Palomar Engineers VLF -A Con- Ken Stryker and HF -235 ($2000). verter is $ 79.95. It uses a crystal -con- 2856 -G West Touhy Avenue Most of those receivers are avail- trolled local oscillator and a mixer to Chicago, IL 60645 able through shortwave distributors heterodyne or translate the 10- Universal Radio, Inc. such as Electronic Equipment Bank to- 500 -kHz range to the 80 -meter am- 6830 Americana Parkway (EEB), Gilfer Shortwave, Grove Enter- ateur band from 3510 to 4000 kHz. The Reynoldsburg, OH 43068 -4113 prises, is Tel. 800- 431 -3939 and Universal Radio. Most of converter inserted between the an- the receivers tune as low as 50 or 100 tenna and the receiver. A similar unit, kHz, although the Watkins- Johnson the VLF -S, converts VLF to 4010-4500 nosedives to a near rock -bottom 5 kHz to work with general coverage working order, and most need some kHz. (rather than ham -bands -only) re- modification to be compatible with a Also, S.P McGreevy Productions dis- ceivers. source of 120 -volt, 60 -cycle alternat- tributes a portable radio, the WR -3 VLF For the experimenter, David Curry, ing current (AC). Also, most tube -type Receiver, specifically for the purpose WD4PLI, at Curry Communications, of- surplus sets are pretty old and tired of listening to whistlers and other natu- fers a number of attractive and prac- now that we're well into the 1990's. ral radio sounds. This handheld, bat- (Continued on page 91) 61 www.americanradiohistory.comAmericanRadioHistory.Com {.1 ' ;%f ,,A .5. Build a one -tube radio designed for high-fidelity AM reception. BY LARRY LISLE, K9KZT Build A One -Tube AM Receiver In this article we'll describe how to circuit (shown in Fig. 1) seems back- before it reaches the diode. I've found build a great one -tube radio. The ward. Unlike most AM radios, the tube that a signal level of 11/2 to 2 -volts wll output of the radio is amazingly amplifier is placed ahead of the di- put the operating point sufficiently far clean because of its wide band pass, ode detector instead of behind it. The up on the linear part of the diode's good -quality transformer, and the use reason for that is to prevent the characteristic curve to produce of headphones. You'll hear more "square-law" bend at the begining of good- sounding music. A 10 -volt signal highs and lows than you probably a diode's response curve from distort- level is probably ideal. thought possible on AM radio, and ing the input signal. In a typical circuit, The radio has no audio amplifier, without the low -level noise, hum, and if the signal falls in the bend, the out- and subsequently, no audio -amplifier distortion that's often present in many put will be extremely distorted -by based distortion. An audio amplifier superhetrodynes! 25% or more. would just make the music sound To avoid that problem, the circuit louder, not better. However, there is How it Works. At first glance, the amplifies the signal from the antenna the tube-based RF- amplifier stage. It has a pentode tube with an untuned input. Not tuning the grid circuit elimi- a C3 V1 L2 1 nates the possibility of regeneration, 6SH7 8 2.5mH 1 which could narrow the bandwidth v J1 and cut off the high frequencies. It C5 it use -to- R3 D1 also makes possible to point R1 365pF ` t 22K 5 1N34 The pentode gives 22K 2 7 point construction. c2 i-- a voltage gain of about 20 -dB. 1/3 ' Jf 1 The crystal diode is tapped of the Cl way up the output coil. That de- .01 R2 C4 _ C6 creases the output voltage a little, but 100f2 01' 100pF T improves the selectivity. If greater se- = o o lectivity is needed, L2 can be re- Sl-a 4- placed by a tuned circuit with the same values as L1 and C5. Capacitor ¡ B1 i B2 C3 should then be reduced to 100 -pF I 6V 9oV or less. The output of the detector is 'SEE TEXT T fed through a volume control (R4) to a audio transformer (T1) and on to hi -fi Fig. 1. The radio uses an untuned RF stage to boost the signal voltage to up to the linear type headphones via J1. portion of the crystal diode's characteristic curve. The circuit's distortion and wide 62 bandpass and a good -quality transformer make for a great -sounding AM radio. (Continued on page 93) www.americanradiohistory.comAmericanRadioHistory.Com A CHRONICLE OF CONSUMER ELECTRONICS Video Mix Master VIDEONICS MX -1 DIGITAL VIDEO MIXER. Manufactured by Videonics, Inc., 1370 Dell Avenue, Campbell, CA 95008; Tel: 800 -338 -EDIT, or 408- 866 -8300. Price: $1199. People in the 1990's don't like being subjected to home videos any more than their 1960's counterparts enjoyed watching home movies or slides of their friends' vacations. Now, however, even if its con- tent is less than thrilling, a video can still pack a punch. And even amateur video makers can achieve professional -looking results, thanks to the Videonics MX-1 Dig- ital Video Mixer. The mixer offers over 200 special video effects, a timebase cor- rector, a frame synchronizer, audio mix- ing, a built -in color generator, picture-in- picture effects, and chroma key. The digital mixer is targeted at video enthusiasts (the "pro- sumers ") and at peo- a digital memory large enough to store one front panel to connect the wires in the rear. ple who moonlight shooting wedding vid- frame of video. That frame can then be The mixer is packaged in a slope -front eos and the like. However, it works so well clocked out in sync with the other input. cabinet. Its top panel has a rocker -type and is sophisticated enough that we Although the mixer can work with two power switch, a take bar for manual con- wouldn't be at all surprised to see it pop up inputs at a time, it has four video inputs so trol of scene transitions, six status- indica- in professional television work. In fact, the that you can leave your sources connected tor LED's, and 41 rubber keys. mixer meets FCC and RS -170A specifica- even if they are not part of the video you Those 41 keys are used to access the tions for broadcast quality. are creating. more than 200 special effects provided by The key features of the mixer are its Its rear panel has three sets of A/V in- the Digital Video Mixer. The special frame synchronizer and timebase correc- puts, each of which consists of two audio - effects break down into about 21 main cat- tor. Without them, it would be impossible in RCA-type phono jacks, one RCA-type egories: to display two video signals at the same video jack, and an S- connector. A fourth Fade: Picture A fades away as a solid time or to dissolve one signal into another, input, for video only, consists of an RCA color (green, for example) fades in. or wipe a new image directly across an- jack and S connector. A set of audio /video Dissolve: Picture A fades away as pic- other. output connectors (including both S -video ture B fades in. The mixer shouldn't be confused with and composite video) is also provided, as Wipe: Picture A is wiped away by Pic- lower cost video -effects generators that is a headphone- output jack. A preview ture B. might allow you to wipe the screen with a output is provided for connection to a sec- Slide: Picture A slides off the screen as solid color and then return to a second ond monitor. Picture B slides on. image. (The mixer can do that as well, Rounding out the rear panel is the Squish, Stretch: Picture A is squished however.) Such generators are "gen -lock- power -input jack and a GPI (general -pur- by picture B, which gets increasingly ed," meaning that they generate video that pose interface) input jack. As on many larger. is locked in sync with an input video other Videonics products, the labels for Wipe combinations: Wipes, squishes, source. But they cannot mix two indepen- the rear-panel jacks are printed both right etc. are combined. dent sources. side up and upside down so that you can Compress or Zoom: Picture is reduced What is needed to synchronize video is see what you're doing if you lean over the er enlarged. www.americanradiohistory.comAmericanRadioHistory.Com Flip: A mirror image of the picture is effect symbol below the preview screens. screen allows you to route inputs in a vari- created. Only 30 symbols fit on the screen at a ety of ways. For example, you can make 'Bumble: Picture A appears to flip like a time, but a cursor pad allows you to scroll one video signal appear on two sources so falling card, leaving picture B in its place. through the effects quickly. The fastest that you can transition from one signal to a Fly -in: Picture B starts out very small in way to find the right effect is to press the modified version of it. That would allow a corner, and then moves toward the center WIPE key, which immediately jumps the you to fade, for example, from a normal as it grows. cursor to the most common wipe, in which image to its negative. Picture -in- Picture: Picture B appears the new image moves from right to left, The setup screen can also be used to tell in reduced size, and then varies in size or replacing the original. To use a diffèrent the mixer to ignore an audio input, or to position over picture A. wipe, just scroll through the other effects. route a single mono input to both the left Mosaic: The picture is divided up into Related wipes are grouped together. Once and right channels of another source. large pixels. the desired wipe is selected, pressing the Advanced setup options -which proba- Freeze: The picture becomes a still im- PLAY key executes it. Pressing PLAY again bly will remain untouched by most age. re- executes the wipe but, of course, with users -allow the headphone volume to be Strobe: The picture is changed into dis- input A wiping over input B. set, and the noise filters and black level to crete, periodic frames The speed of the wipe (or any other be adjusted. An automatic gain control for Paint: A posterization effect, in which effect) can be programmed to one of ten chroma signals can be adjusted to com- the number of colors in the picture are speeds. The effects can also be controlled pensate for weak color signals. The time - reduced. manually with the "take bar," so their base corrector can be locked to Solarization: The lightest and darkest duration can be virtually any length. This compensate for deviations in the video values are made dark, and middle tones is important for many special effects. For frame rates between the inputs and output. are made light. example, the dissolve transition can be Chroma key is a process that allows you Black- and -white: The color informa- made to last indefinitely, and two video to replace selected colors of one video tion is removed from the image. images can be superimposed on top of image with another video image. Chroma Negative: The picture becomes either a each other. Using that technique, an image key is used extensively in television. black- and -white or color negative. of someone hiking might be superimposed Weather forecasters, for example, often Filter: A color tint is added to the im- on a map of his route for the duration of the appear to be standing in front of a large age. scene. video weather map. In reality, they are Compose: A user -composed image The video mixer is not a video editor. standing in front of a wall that is usually (lines or borders) is added to the video. That is, it can't control video sources. blue or green. Processing equipment uses Keying: A single color or luminance However, it can easily be incorporated into chroma key to replace the wall -and any level is replaced with a second image. a setup that includes edit controllers and other objects the same color-with a sec- The effects can be combined in various video processors. They can be placed ei- ond video image of the map. The fore- ways to create about 240 separate effects. ther at the mixer's input or output. caster views the combined image on a Although not essential, using two Basic audio -mixing functions are pro- monitor so that he can see what he is monitors is the best way to get the most out vided by the video mixer. The audio at the pointing to. of the mixer. One lets you view the edited output can either follow the video transi- Luminance key capability is also pro- output. The second is connected to the tions at the inputs, or can follow one input vided by the mixer. Luminance key works preview -out jack. only. Just as with video, audio processors the same way as chroma key, but video is The preview screen shows four preview can be used with the mixer, either at its replaced based on its brightness rather images -the four video inputs -in mini- inputs or outputs. If you use an audio pro- than its color. ature and with reduced frame rate. The cessor, however, you lose the advantage of Picture -in- picture, or PIP, provides a preview screen indicates which is the cur- fading the sound automatically with pic- powerful tool for videographers. PIP can rent source, and which is the next source. ture fades. create an image that looks just like that Below the four preview images are an array Setting up the mixer is surprisingly created by a TV's PIP feature. But the of symbols to indicate the effect that can easy: Just plug in your video equipment mixer's PIP is more powerful -it can be be used when transitioning between and one, preferably two, monitors. When made any size and moved to any place on sources. the mixer is powered up, an automatic con- the screen. Let's assume that you want to do a sim- nection feature does all the rest. It looks at The mixer's compose mode allows mul- ple wipe, replacing the video at input A each of the four inputs and then configures tiple still (frozen) video images to be with video from the input B. Four steps are itself to use the jacks that are carrying placed on screen along with color lines required. First, the current source must be signals. and rectangles. "Holes" can be cut in any set to input A by pressing the CUT A key. If an input has a signal on both the S- element so that the background video will Then the next source is selected with the video and composite -video connectors, show through. The background video is CUT B key. The preview screen indicates the S connector will be used. If only one the only element of a composed screen which is the active source and which is the input has a signal, that one will be used. that can be moving video. next source. On the keyboard, the LED Although the mixer can create some A "learn" mode allows you to teach the i above the CUT A key is on, and the LED amazingly sophisticated video transitions, mixer a series of effects or transitions above the CUT B key flashes. its basic operation is reasonably straight- ahead of time. Up to 50 steps (25 transi- The third step is to choose the wipe forward. We liked its built -in Demo mode, tions) can be memorized. However, they effect by highlighting the appropriate which cycles the mixer through many of are not stored in memory once the mixer's its transition effects. If more than one in- power is turned off. put is connected to the mixer, it will transi- In the short time that we had to review Gizmo is published by Gernsback Publica- tion between the first two that it finds. If the mixer, we tions, Inc., 500 -B Bi- County Blvd., Farm- never mastered its full poten- only one is connected, it will transition tial. However, we ingdale, NY 11735. Senior Writers: Chris F. were more than im- O'Brian and Teri Scaduto ®Copyright 1994 from that source to itself. pressed by it. In the right hands, the MX -1 by Gernsback Publications, Inc. Gizmo is a In some situations, the automatic setup Digital Video mixer could create astound- 64 registered trademark. All rights reserved. mode is not sufficient. A manual setup ingly good video. www.americanradiohistory.comAmericanRadioHistory.Com Heard but Not Seen SONANCE S3500 IN -WALL LOUD- SPEAKERS. From Sonance, 32992 Calle Perfecto, San Juan Capistrano, CA 92675; Tel: 714 -661 -7558. Price: $489. NOTE: The Sonance S3500 speakers were reviewed as part of last month's whole- house audio /video custom -installation feature. When we ran out of space, we moved the speaker review to this issue. For more details on the actual installation, see the September issue of Gizmo. One of the most important requirements of a good whole -house audio/video sys- tems is that it should not "take over" the entire house. It should provide quality au- dio and video with maximum con- venience, and it should not dictate the decorating scheme. The right in -wall speakers help a whole -house system meet tening to Muzak'" through round, ceiling - vent the sound from the back ofthe speak- all of those goals. mounted speakers that lack any real audio er cone from canceling the sound from the We chose the Sonance S3500 for our presence. In -home in -wall speakers also front. Without an enclosure, at low fre- installation. Its hallmark feature is a pivot- lacked fidelity. quencies the front and back air merely ing tweeter that allows the high frequen- Today, however, homeowners who want moves back and forth around the cone and cies to be directed to the listening area. a built -in look no longer have to build false cancel each other. The closed box acts as That's an important advance for in -wall walls to hide the cabinets of standard an infinite baffle and prevents the interac- speakers, which can't always be placed in speaker systems. Cabinet -free in -wall sys- ticn of the rear- and front- produced sound. what would normally be considered an tems can provide both high -fidelity sound The enclosed air also acts as a spring on optimum position. The S3500 lives up to and unobtrusiveness. the speaker diaphragm, which, with prop- Sonance's reputation for high-quality in- If a cabinet is such an important part of a er design, can be used to benefit the speak- wall speakers that are easy to install. loudspeaker system, how can an in -wall er's performance. An in -wall speaker uses Many people have misconceptions speaker provide high fidelity without a the wall as a baffle to isolate the rear of the about in-wall speakers, and scoff at them cabinet? A loudspeaker enclosure is, in- speaker from the front. as being suitable for nothing more than deed, an important component in a loud- The S3500 is a two -way speaker with a providing background music. That per- speaker. In some ways, it's the most frequency response created at 45 Hz -20 ception is understandable. After all, quali- important component. The world's best kHz, ± 2 dB. Its 61/2-inch woofer features ty in -wall speakers are relative newcomers driver will sound terrible if it's mounted in a dual voice coil, which improves its abil- to the audio scene. Most people's experi- a poor cabinet or in no cabinet at all. Take ity to deliver bass frequencies. The dual ence with in -wall speakers consists of lis- a woofer out of its box, and what was once voice coil can be defeated to tailor the driving bass sounds puny. sound for room acoustics or listener prefer- The main job of an enclosure is to pre- ences. This is done with a three- position The S3500's Flex -Bar brackets simplify installation. The speaker is simply an- gled into the hole, and the screws are tightened down. That sandwiches than sheetrock between the Flex -bar brack- ets and the speaker baffle. A side view of the Sonance S3500 being installed using the integral Flex -Bar brackets. 65 www.americanradiohistory.comAmericanRadioHistory.Com slide switch behind the speaker grille. When the switch is moved to its -2 -dB With the switch in the + 2 -dB position, position, bass response is attenuated, and the dual voice coil is used, and the speaker the speaker impedance is raised Áo 8 ohms. impedance is 4 ohms. In the O -dB posi- The rear of the polypropylene woofer is tion, only a single voice coil is used, and protected with a perforated basket. the speaker impedance is raised to 6 ohms. The tweeter of the S3500 is a 1 -inch soft- With the hole cut out and the wires run through the wall, the speakers, equipped with Flex -Bar mounts, could be angled into the wall. dome unit with a Neodymium magnet. Neodymium magnets can be made small and light, yet they still have high magnetic flux. The size and weight were important factors in the design of the pivoting tweeter. The only drawback (besides the price) of Neodymium is its relatively low Curie point: Neodymium loses its magnet- ic charge once its temperature exceeds The template with the speaker makes it ease to mark the locations the supplied for 105 °C. Ferrofluid (which has a thermal holes to be cut. conductivity about eight times that of air) is used in the speaker's air gap to promote heat transfer. A tweeter adjustment is also provided to tailor the speakers' performance to room acoustics. Three positions, + 3 dB, 0 dB, and -3 dB, are available. The S3500 speakers are rated to work with amplifiers that deliver between 5 and 75 watts. They are rated to produce a sound -pressure level of 90.5 dB measured at 1 meter with a 1 -watt input. The pivoting tweeter makes the S3500 extremely versatile. Because the high fre- quencies can be aimed toward an area, speaker placement is less of an issue. That's important because in -wall speaker placement is often dictated by aesthetics and construction realities. The pivoting tweeter allows even ceiling- mounted speakers to provide adequate imaging. For surround -channel applications, the tweeter can be pointed at a reflective sur- face (ceiling or other wall) to disperse the sound. The S3500's measure Pa x 123/is inches and are 31/2 inches deep. They are available with either metal or cloth grilles, both of which can be painted. The speakers can almost be made to disappear on walls where cloth wallpaper is installed. The wallpaper can simply replace the grille cloth. The S3500 in -wall speakers do what in- Cutting a "pilot hole" to be sire that there are no behind -the -wall obstacles to the wall speakers should. They provide excel- 66 speaker placement. lent sound almost invisibly. www.americanradiohistory.comAmericanRadioHistory.Com GIZMO NEWS Subway Cellular VCR The first cellular subway phone system DIGITAL SPECIFICATIONS in the U.S. is now installed in Washington, D.C.'s Metrorail subway system. The in- Standard Definition High Definition stallation of the microcell by Bell Atlantic Recording System Azimuth recording with Azimuth recording with Mobile will enable the half-million daily rotating heads rotating heads Metrorail riders to make and receive cel- Video Signal Recording Digital component Digital component lular phone calls in the underground sta- recording recording tions and in trains. With the introduction of the system, Video Sampling Frequency Luminance = 13.5 MHz Luminance = 40.5 MHz which should be extended to all Wash- Video Quantization 8 bits 8 bits ington subway stations by the end of the Video Recording Rate 25 Mbps (after bit -rate 50 Mbps (after bit -rate year, Washington joins Hong Kong and reduction reduction Singapore as the only subway systems in the world with cellular coverage. Audio Signal Recording PCM digital recording PCM digital recording 2 ch: 48 -kHz sampling freq. 2 ch: 48 -kHz sampling freq. CD -R Trojan Horse 16 -bit quantization 16 -bit quantization 4 ch: 32 kHz sampling freq. 4 ch: 32 kHz sampling freq. A computer virus named "CD -IT" was 12 -bit quantization 12-bit quantization released on the Internet. The program was a shareware PC utility that promised to Tape Metal Evaporated (ME) tape Metal Evaporated (ME) tape turn an ordinary CD -ROM drive into a or equivalent or equivalent CD- recordable (CD -R) device. That, of Tape Speed 18.8 mm /sec 37.6 mm /sec course, is impossible. Recording Time Standard cassette: 4.5 hrs. Standard cassette: 2.25 hrs The file, CD- IT.ZIP, stated that it was Small cassette: 1 hr Small cassette: 0.5 hrs copyrighted by Chinon Products. Chinon America, which didn't create it, specu- Video Bit Rate Reduction DCT (discrete cosine DCT (discrete cosine lated that the creaters of the virus used the transform) transform) Chinon name to give it an air of respec- tability. Anyone who was silly enough (or may- year with the hope that they will be accept- and half that for high definition. An op- be just curious enough) to download the ed as an international standard for digital tional IC memory can be built in to the file found that it corrupts some system files VCR's for the NTSC, SECAM, and PAL cassette to store a table of contents, date on the PC's hard drive, crashes the CPU, standard TV formats as well as for high - and time of recording, and other relevant forces the user to reboot the system, and definition TV (HDTV). information. Automatic tracking will be stays in memory. The cassettes that are specified for the performed using digitally generated pilot new format are significantly smaller than signals. Digital VCR's Coming VHS tapes. Two sizes are specified, one The first models could appear soon in At its second general meeting, the HD for home taping and the other for camcor- the broadcast and industrial markets. Con- Digital VCR Conference announced ders. The larger, about the size of a stan- sumer models are not likely to appear until agreement on "Consumer -Use Digital dard compact- cassette case, has a after next year. JVC, which invented the VCR Specifications." Fifty companies recording time of 4' hours in standard VHS standard, participated in the Digital from around the world participated in the definition, and half that in high definition. VCR Conference. The company, however, conference. The specifications will be The smaller, about the size of a digital is trying to reassure the public that VHS submitted to the IEC (International Elec- audio tape (DAT) cassette, has a recording will be a viable format for many years to tronics Commission) by the end of this time of one hour for standard definition come. present was a handy little gadget called Those limitations didn't slow Dad down something like the "Dymo Labelmaker" a bit-he began cranking out labels for Label Mania that Dad could use to make "custom" every book, record, and file folder in the labels. The handheld device had a dial house. Then he moved on to the garage, P TOUCH PC LABELING SYSTEM. Man- stamped with each letter of the alphabet, labeling the gardening tools and all those ufactured by Brother International Cor- numbers 0-9, and several punctuation old coffee cans full of a jumble of nails and poration, 200 Cottontail Lane, Somer- marks. To print a character on a label, Dad other fasteners. We kids weren't spared- set, NJ 08875 -6714; Tel: 908- had to spin the dial to the correct letter or he labeled our book bags, pencil cases, 356 -8880. Suggested retail price: $499. number, and squeeze the "trigger" to and looseleaf binders. Mom drew the line make an imprint on the scroll of adhesive- when he wanted to tag all the contents of When we were kids, we managed - backed plastic tape. If memory serves, the kitchen cabinets. once-to come up with a Father's Day gift only one label width was available, al- We thought his obsessive behavior was that didn't end up in the back of a closet though, the label tape might have come in a bit odd, but patents are known to do with all those ugly ties. The break -through three colors: black, red, and blue. strange things. It was more disturbing 67 www.americanradiohistory.comAmericanRadioHistory.Com when, in the late 1980's, labeling entered background colors, a wide selection of with label- making or draw programs, we the electronic age, and some of our friends print sizes and styles, and dozens of scala- had no trouble navigating through the began acting disturbingly like dear old ble symbols and graphics. The device has Windows -based software. Dad. Armed with P-Touch electronic label the ability to import font styles, text, and We were quite happy with the results, makers, they were tagging tennis rackets, images from other programs, It can also except that there seemed to be an excess hockey sticks, entire album collections - print bar codes, using most common bar - amount of blank tape on each side of the in short, everything in sight. code protocols. type. We finally broke down and consulted To date, Brother International has sold The P-Touch PC is a desktop peripheral the manual to resolve that problem. Had more than two -million P -Touch units -an that, at 3.2 x 6.6 x 8.9 inches, doesn't re- we read the set-up instructions before be- impressive figure for a device that doesn't quire much space. A compartment on the ginning, we would have learned that the even seem to fit in any particular product left side of the unit houses the tape cart- Print Settings menu, found in the pull - category. Of course, the P-Touch was ridge. (Tapes are available in a wide selec- down File menu, offers an Options sub - much easier to use than its manual prede- tion of colors and widths, at prices ranging menu. Options is used to select the tape cessor, and afforded users many more op- from $29.95 to $44,95 for a single car- width and length, the amount of tape be- tions. And the proliferation of home -of- tridge.) tween each label (tape feed), the intensity fices-with all those files, file cabinets, Installation is reasonably straightfor- of the print, and the auto -cutting and mir- computer diskettes, and presentation ward: Plug the P-Touch PC into an avail- roring options. In auto -cutting mode, the folders-kept sales going strong. Several able serial port, then run the SETUP.EXE P-Touch PC severs the tape between labels models are available, ranging in (street) program from within Windows. The in- automatically. (With auto -cutting on, the price from $100 to $400 for a P-Touch stallation program is rather bare -bones. minimum tape length is three inches.) If designed for high -volume label- making. For example, it doesn't give you an option mirroring is selected, a mirror image of the Somehow, though, the label -making of which port to use. Instead, it assumes on- screen label will be printed, which mania passed us by, When something that you will install it in COM1. To change comes in handy for placing labels inside needed a label, we just picked up a pen and the port, you must do so through the Win- windows, for instance. wrote one. dows Control Panel. That might not be so We also learned, in browsing through At least, that's how we used to do had if the on -line help was halfway decent, the manual, that a tool called the "label things, before label- making met the com- but it's among the worst we've seen. We stick" was stored in the tape -cartridge puter age. Brother's latest offering is the P- expect that Brother's free technical sup- compartment. To remove the backing from Touch PC computer label printer, which port phone lines will be kept busy. a printed label, the label is inserted lets you take practically anything that you Once the P-Touch PC was connected, through a slot in the stick (as you would can view on your computer screen, includ- we started out modestly, designing and thread a needle). Holding the label inser- ing a photograph, and put it on a label. printing an address label. We selected the ted halfway through the slot in the left A far cry from the old Dymo Label, the fonts and text sizes, aligned the text attrac- hand, twisting the stick with the right P-Touch PC is incredibly versatile. It of- tively, added a picture from one of the hand, and then pulling the taut label free of fers five different label widths, label included graphics tiles, and printed out a the stick loosens the backing, making it lengths ranging from two inches to one label -all without opening the manual. easy to peel off. meter (2,7 feet), a variety of type and Despite our somewhat limited experience Next, we set about organizing the Gizmo offices, labeling file folders, maga- zine holders, boxes of back -up material, floppy disks, and even the outside of file cabinets (in case we forgot what files were in each drawer). Making labels with the P- Touch PC is fun because it's so versatile, yet so easy to use. You can get a bit cre- ative: color-code your files or add images to labels. For example, you can add a little computer icon on the labels for floppies, or import a photo of the birthday girl to the label for a birthday video. Everything we'd created to this point had been done in the custom -label mode. The P-Touch PC also offers a database mode, You can create databases of names and addresses, and then print out mailing labels, name tags, and the like using the included data. Each database can consist of up to 20 fields of your choice. A business -contact database would include fields such as first and last name, title, company, street, city, state, zip code, phone, and fax. A person- al- contact database might include name and address, home and work telephone numbers, fax number, spouse's name, kids' names, and even such things as birth- days and anniversaries. The fields in a single database can be 68 manipulated in a number of different www.americanradiohistory.comAmericanRadioHistory.Com Tower of Power VCR PLUS + CONTROL TOWER UNI- VERSAL REMOTE WITH CALLSET. From Gemstar Development Corporation, 135 North Los Robles Avenue, Suite 870, Pasadena, CA 91101; Tel: 818- 792 -5700. Price $59.95. All too often, the products that are sup- posed to enhance the quality of our lives also end up causing problems and aggrava- tion. The most obvious example, of course, is the videocassette recorder, which, when first introduced, was too complex for many consumers. Not far be- hind on the "annoying convenience" list is the remote control -a handy device that seems to multiply whenever our backs are turned, filling our living rooms with clut- ter. One of the original spice jars, with its torn and faded label (left), and the new -and- Occasionally, however, a convenience Improved version, with its plastic -laminated, P -Touch PC label. product is introduced that really does make life easier -- -such as the VCR Plus + ways. City, state, and zip -code fields can us only an hour or so to design and print a instant programmer from Gemstar. First be joined on a single line for a mailing close match for each of the 16 old labels. introduced in 1990, VCR Plus + tech- label, on which the phone and fax fields Because the text ran in two different direc- nology provides one -step, error-free VCR would not be printed. A Rolodex could be tions, we had to print each label in two taping. The user simply inputs a special filled with labels listing all of the fields, parts. But, with some careful matching, code number that appears in TV Guide and perhaps with the phone number in larger the finished results looked great. And the the TV listings pages of more than 800 size type for easy reference. Before a busi- laminated, peel- and -stick labels we cre- newspapers and other publications world- ness meeting, name tags consisting of ated are sure to stand up to washing better wide, and the programmer does the rest. name, title, and company could be gener- than the original paper labels ever could The device automatically changes the ated. You could even add your company have. channel on the VCR or cable box, and logo to the name -tag labels. The creative design process gave us a commands the VCR to start and stop re- It wasn't long before we were updating good feel for the P -Touch PC's ca- cording at the correct times. our phone hooks and mailing lists using pabilities, and also its limitations. On the Having successfully tackled the prob- the P -Touch PC's database function. When plus side, the software is very easy to use lem of time -shifting VCR programming, it occurred to us that we were acting just and the font selection is extensive. We Gemstar has now come up with a product like Dad with his Dymo Labelmaker, we found a font that was almost an exact that goes a step further to take on the rationalized that at least we weren't just match for the original labels. And, al- remote -control- clutter dilemma as well. labeling for the sake of labeling: We were though it was our first experience design- The VCR Plus + Control Tower is a univer- getting organized -and being creative in ing a label that didn't follow the standard sal remote control that contains the auto- the process. format (one or several lines of text), we matic- programming technology. It also To prove just how creative, we decided were able to complete the process quickly features a relatively new feature called to tackle a chore that we'd been putting off and easily. without having to once consult "CallSet," which allows the initial setup because we weren't sure how to go about the manual. of the device to be done by phone. it: replacing the cracked and peeling labels When it came to drawing the border, The Control Tower literally stands out on a set of "antique" spice jars that we'd however, we came across some of the soft- from the remote -control crowd -it's de- picked up at a garage sale. We wanted the ware's shortcomings. Because it is de- signed to stand up vertically, rather like new ones to he identical to the originals, so signed primarily for label -making, its some recent models of cordless phones. that the set would retain its 1940's -ish draw capabilities are an "extra," and are (In fact, a visiting I9- month -old girl charm. limited. No background grid is available, grabbed it, held it to her ear, and proudly The old labels featured the spice name making it difficult to keep the pattern said "Phone! ") The bronze -tone case with printed horizontally, with the spice -com- straight and to ensure that the right side round hase is distinctive, as is the liquid - pany name printed vertically beneath it matches the left. There is no way to draw a crystal display that spans the top of its and "purified" printed in an are above it. curved line using the P-Touch software. face. The buttons arrayed below the dis- The lettering was surrounded by a domed - (To create the top of the border, we drew an play, from top to bottom, are for power on/ top border. We'd considered making a oversized circle that met the tops of the off and programming, numeric keypad, stencil of the border, and maybe using vertical lines of the border. Then we trim- channel and volume changing, playback those rub -on letters found in art- supply med away the unneeded part of the circle functions, and device selection. The Con- stores, but that seemed like an awful lot of after the label was printed, leaving a neat trol Tower can operate a TV, VCR, cable work-after all,there were 16 bottles in the arched top.) There was also no way to type box, and one additional TV, VCR, or cable set. a row of letters along an arc; we had to box -but not a laserdisc player or satellite Using the P-Touch PC and the supplied carefully position each letter in the word receiver. 1 -inch wide, white labels, however, it took (Continued on page 72) Unlike most universal remotes, you 69 www.americanradiohistory.comAmericanRadioHistory.Com because only the first call is free; subse- quent calls cost $4.95 each. So it's impor- tant to have all the necessary information available when you call the first time. The operator asks for the brands and models of your components and your zip code, and then instructs you to place the foam -rubber disc on the bottom of the Control Tower, and place the phone's earpiece next to it. The tones sent over the phone line set up the Control Tower automatically. With setup complete, the Control Tower works just like most other universal re- motes. Pressing one of the device buttons puts the remote in TV, VCR, cable, or auxiliary mode. Channels can be tuned using the numeric keypad or the channel 5:30PM Tuesday 7PM IW'd:f MAKE THE GRADE -Game 751075 ® HORSE RACING WRAP -UP 203094 D BUGS BUNNY AND PALS; 90 min. 777926 5:35 ®WHO'S THE BOSS? (CC) 201836 IESANDY GRIFFITH -Comedy BW 7824146 EVENING 6 PM tICBS NEWS (CC) -Dan Rather 29 EMI NEWS 7181(9549 E] CHEERS (cc)-Comedy 5933 Sam's regulars are reluctant to hang out at a bar that's promising to become a gay hangout. Ted Danson, Shelley Long, Tom: Alan Autry. MacNEIL, LEHRER; 60 min. 64094 m WOODWRIGHT'S SHOP 98467 m AMANDA SABATER; 60 min. 86810 ED FAMILY TIES (CC)- Comedy 52758 Fearing the worst as Steven undergoes heart surgery. Elyse confides her deepest concerns to Alex. Part 2 of three. Young Steven: Mi- chael David Wright. HEALTH -Discussion 655 PASIONARIA -Novela; 60 min. 46549 GIMME A BREAK!- Comedy 112079 Nell (Nell Carter) decides that Carl (Dolph Sweet) has been a widower long enough. M INDIANA NIGHTLY REPORT; 60 min. 82536 ID HIGHWAY TO HEAVEN (CC)- Drama; 60 min. 77487 Jonathan (Michael Landon) must find a male for the widow of another angel -who doesn't want her to remarry. Mark: Victor French. Ted: John McLiam. Laura: Martha Scott. Roy: Har- vey Vernon. Margaret: Nana Visitor. WORLD OF SURVIVAL 778742 t!DTHIS IS YOUR LIFE 32926 ex OUR VOICES -Discussion 215839 ' MONEYLINE -Lou Dobbs 730617 DSc RENDEZVOUS -Travel 750346 SN COLLEGE BASKETBALL; 2 hrs. 913988 Clemson vs. Seton Hall in the ACC-Big East Challenge at Syracuse. N.Y. (Live) SCARECROW AND MRS. KING -Adventure; 60 min. 555013 (tì E. N. G- Drama; 60 min. 631487 don't reach for the manual as soon as you placing the call. Four 'AAA" batteries Íue HALF HOUR COMEDY HOUR 385181 m INSPECTOR GADGET -Cartoon 758988 open the box. Instead, you reach for the must be inserted in the battery compart- ® SPORTS WRITERS ON TV- Discussion: telephone. 60 min. 807094 There's no need to look up spe- ment (located in the base of the Control Ir?1BABY'S FIRST CHRISTMAS 7580t3 cial codes to be input for each of your Tower). You must be prepared to tell the t 3 TO BE ANNOUNCED 208549 6:051ER HAPPY DAYS-Comedy 2844520 components, or to line up the old remotes Gemstar operator the brand and model 6:30 filENTERTAINMENT TONIGHT (CC) 181 Scheduled: A segment on backup singers. with the universal one to "teach" it how to number of your video components, your ©HARD COPY- Newsmagazine 8433 control your gear. The CallSet feature al- cable- company lineup (if applica- pWHEEL OF FORTUNE (CC) -Game 6029 charnel ONIGHT COURT-Comedy 1365 lows the initial setup to be done over the ble`, and your personal identification Billie (Ellen Foley) invites Harry to her apart- ment for a birthday dinner, but their evening is phone. number (which appears in the manual). disrupted by a flustered intruder. Nick: Oliver Clark Harry: Harry Anderson, Actually, you do have to open the man- You must also have a TV listing that con- IFROM SOCRATES TO SARTRE 18839 ual to find the directions for using CallSet. tains VCR Plus + codes on hand, and the CURRENT AFFAIR (CO) 63810 NEWS 907 The manual is an accordion- pleated in- included piece of foam rubber that will structior. card with virtually no text, just help provide a better audio transfer be- 142/TV GUIDE labeled illustrations. It provides directions tween the phone and the remote. The PlusCodes used for automatic VCR for the automatic setup procedure, as well When you place the ell (7AM to 7PM timer -programming now appear in the as for manual setup, including setup -code Monday through Thursday, 7AM to 6PM TV listings of over 800 publications lists for TV's., VCR's, and cable boxes. Friday, 9AM to 5PM weekends, Pacific worldwide. To record Cheers using the If you opt to go the CallSet route, there Standard Time), you must enter your PIN listing shown above, you would input its are a few preliminary steps required before before you can talk to an operator. That's PlusCode: 5933. www.americanradiohistory.comAmericanRadioHistory.Com up /down toggle key. The VCR and volume volume control. It's not continuously vari- controls -including mute -work re- able as most volume controls are. Instead, gardless of what mode is selected. The Small Wonder it has only two positions, low and high. We REVIEW button, which lets you examiné weren't too happy about that, but we fig- the VCR Plus+ timer -record settings, FM SOUNDS MINIATURE FM RADIO. ured that we had to trade off something to also works as a last- channel -recall button Manufactured by American Technology get such a small radio. when in TV mode, if your TV offers that Corporation, 12800 Brookprinter Place, Only two other controls are located on feature. The Control Tower doesn't pro- Poway, CA 92064; Tel: 619 -679 -2114. the FM Sounds: SCAN and RESET vide access to any other advanced TV fea- Price: $29.95. membrane -type buttons. A push of the tures, however. SCAN button causes the radio to automat- What sets it apart from other universal When we heard the claim that the ically scan up in frequency until a station remotes, of course, is VCR Plus + pro- world's smallest FM radio had been intro- of adequate strength is found. The RESET gramming. To set the Control Tower to duced by American Technology Corpora- button returns the receiver to the bottom of record a program, you must leave the VCR tion, we had to get our hands on the FM the FM band. When the top of the band is off and the cable box on. Then you find the Sounds. We have always loved the mini- reached, the RESET button must be pushed program you want to record in the TV aturization that electronics has made pos- to return to the bottom of the band. That's listings, and enter the PlusCode number sible. not really an inconvenience. On the con- that appears next to the program name. It sounded too good to be true: digital trary, because there is no display. it actu- Press the ONCE, WEEKLY, Or DAILY button touch tuning in an FM receiver that ally helps you to keep track of where you for one time, once -a -week, or every-day weighed less than a quarter of an ounce are tuning. recording of that program, and you're set. and was designed to be worn in the ear! We When we first powered up the radio, we Just make sure that the Control Tower is couldn't wait to try it. hit the RESET button, and then SCAN. placed in an upright position with a clear The unit arrived in a protective carrying Nothing. We heard what we thought was a line of sight to the cable box and VCR. At case that stored the receiver, two batteries, station being passed, but that was it. Ha!, the proper time, the Control Tower turns an ear clip, and two antennas. The batteries we thought. Another rip -off! We changed on the VCR, tunes to the right station, and are two 1.5 -volt type -392 button cells. The our position slightly and tried again. This begins recording. ear clip, which is removable, helps to hold time we received one station, a local The Control Tower is compatible with the receiver snugly in the ear even when broadcaster. Needless to say, our opinion nearly all brands of TV's, cable boxes, and you are walking or jogging. Without the didn't change much. VCR's. With almost 125 different brands ear clip, the receiver has an annoying tend- We were so disappointed by the results of VCR's and 60 brands of cable boxes on ency to fall out of the ear if you move that we weren't even going to bother to the VCR Plus+ compatibility list, your around too quickly. connect the second antenna. When we did, gear is most likely represented. And when Two antennas are supplied with the re- l owever, we were pleasantly surprised to you upgrade your system with a new com- ceiver. The first is a stiff piece of wire be receiving stations. Reception was actu- ponent, the Control Tower can keep pace. about four inches long. The second is a ally quite good- better, in fact, than what By calling and telling the operator the new flexible wire that is about 27 inches long. was provided by many of the personal ster- brand and model of the new TV or VCR, Since the short antenna was installed when eos that we've tried! new tones will reprogram the remote con- we received the unit, and because it We do have our complaints about the trol to reflect the change. seemed more convenient, we powered up receiver, however, and we would probably Of course, with CailSet costing $4.95 a the radio and gave a listen. be willing to put up with an increase in size pop, you might prefer to do it yourself. The power switch is also the radio's to fix the problems. The most troublesome Fortunately, that's not very difficult. If you wanted to program the Control Tower to operate your new TV, for in- stance, you would press the SET button, the number two, and then the TV button. Then you would enter the TV manufacturer code from the chart in the manual, and press ENTER. If the code is correct, the TV will switch on and turn to channel 9. If the code is incorrect, you must keep pressing ENTER to test the next "subcode" until the right one is found. Rather than scan through all the manufacturer codes in its search, the Control Tower is programmed with one code for each manufacturer and subcodes for various models. In our case, for our Panasonic TV, we entered the Panasonic code (26) and then pressed ENTER twice - the proper code was 26 -3. Pressing the SET button then completes the process. The same process is used to program the Control Tower to operate the VCR and cable box. An additional step is required for the auxiliary component -you must let the remote know if it is a TV, VCR, or cable box before entering the code. (Continued on page 72) 71 www.americanradiohistory.comAmericanRadioHistory.Com aspect of the receiver is that it is very TOWER OF POWER LABEL MANIA frustrating to use when you are walking. If (Continued from page 7/) (Continued from page 69) you lose a signal momentarily, the radio will scan up in frequency. Then you have to start all over again trying to find it. Our If your cable company adds a new sta- "purified" to get it to look just like the second complaint is that the buttons are tion to its lineup, you can enter that man- original. not easy enough to press -our ear was ually as well. The newspapers and Those design limitations can be side- hurting after just a short listening time! We magazines that offer PlusCode numbers stepped, however. The P-Touch PC allows would have preferred actual pushbuttons also print a chart that lists TV stations and you to create a design using a program instead of the membrane switches used by the corresponding VCR Plus+ guide specifically intended for drawing, and then the unit. channel numbers. To add a new station, import a bitmap of the image into the P We would also like to have a manual - you follow the same setup procedure as for Touch software for printing. tune mode along with the auto -scan mode. components, inputting the VCR Plus + However, we had problems importing And we would like the option of hearing guide channel number and then the actual general graphic images that we had cre- the radio while it scans. As is, it mutes channel number in place of the model/ ated or downloaded, even though they automatically. brand code. The same procedure is used to were in the BMP format (the only one that The FM Sounds is impressive because change channel settings. the P Touch PC supports) and displayed of its size. It doesn't really strike us as a Through all the setup steps, the Control properly in any other software we tried. very practical receiver, but it is fun. In Tower's display lets you monitor the infor- Because the technical -support staff some instances, however, it can be prac- mation as you input it, and provides prom- couldn't suggest any fixes, we decided not tical. We used it, for example, in conjunc- pts to help you through each step -"Press to waste any time creating another unusa- tion with a low -power FM transmitter to ENTER" for instance. The display provides ble image. listen to TV audio as we moved around the similar prompts when you use VCR With its street price hovering around house on a Saturday afternoon. Because Plus + to program your VCR. $250, the P Touch PC would be a handy, the transmitter had adequate signal For our own video setup, we'd have affordable addition to many small busi- strength, we never lost the signal. The re- liked the auxiliary mode to operate a laser- nesses and home offices. Doctors and den- ceiver is light enough that it was a very disc player or a satellite receiver. For the tists could label patient folders, keep comfortable way to listen. much more common TV- VCR -cable set- databases for mailing purposes, and even American Technology Corporation is up, however, the Control Tower serves its label specimen jars without worrying reportedly expected to introduce a product dual purpose admirably. It replaces up to about the writing smudging if it got wet. called Wireless Sounds that bundles such a four original remotes -reducing clutter Shop owners would surely appreciate its transmitter with the receiver. Perhaps they and confusion -and, thanks to VCR ability to print barcodes on labels. Just be should start work on laptop computers - Plus + and CallSet, it makes time -shifted warned: It's hard not to get a bit obsessive we still haven't found one small and light recording a snap, even for those who are at first you just might label everything in enough for our tastes. technologically impaired. sight. ELECTRONICS WISH LIST On- Screen Financial Adviser Making an investment in The Wall Street Journal Personal Finance Library THE WALL TItEET JOURNAL from Vertigo Development Group (58 Charles Street, Cambridge, MA 02141) could help you decide what to do with the rest of your investments. The Windows - based software contains a collection of articles from The Wall Street Journal, Personal Finance Library combined with interactive software that lets users apply the authors' advice and information directly to their personal situations. The computer handles most of the drudgery associated with financial planning, eliminating the need to pore through a lot of text or do complex calculations or formulas. The on -screen articles feature "Activelnformation" pages that allow users to input personal finance information. For instance, an article entitled "Buying or Renting: By the Num- VERT1G0 bers" asks the user to supply the home purchase price, down payment, closing ActivcBook points, etc. Based on that information, a recommendation to buy or rent is offered, with an explanation. Other subjects include paying for college, saving for retire- ment, choosing the right insurance policies, refinancing mortgages, investment 72 Personal Finance Library strategies, and paying down debt. Price: $69.95. www.americanradiohistory.comAmericanRadioHistory.Com ELECTRONICS WISH LIST Snail Speakers If it doesn't bother you to spend more on a stereo speaker system than your parents probably paid for their first house -or to supply it with the eight discrete channels of high -power amplification it requires-check out the Nautilus Project loudspeaker from B &W Loudspeakers of America (P.O. Box 8, 54 Concord Street, North Reading, MA 01864 -0008). Representing a radical departure from conventional speaker design, the Nautilus was inspired by the natural form of the Ammonite Nautilus-in layman's terms, the snail. Each of the system's four dynamic drivers operates into a "lossy waveguide" transmission line -a colum tapered to follow an exponential curve and smoothed to eliminate any corners or edges that would impose unpredictable resonances or distractions. The 12 -inch woofer's transmission line is curled back upon itself, forming the body of the "snail," while the smaller drivers' waveguides each extend to the rear to create the three "antennae." The principle behind the design is to eliminate the internal resonance of conventional speaker cabinets, thus avoiding the highly colored radiation of back waves. The Nautilus has four custom -designed drivers, each developed to behave as a near -perfect piston within its operating range. They are decoupled from the enclosure to keep the Nautilus free of stored energy and cabinet resonance. The 12 -inch bass unit's cone produces fully coherent motion to beyond 1.5 kHz. It has two midrange drivers: A four-inch, flat -fronted driver delivers the two octaves (220 -880 -Hz) between the bass transducer and the more conventional midrange; the next two octaves are reproduced by a two -inch aluminum -dome midrange driver. A one -inch aluminum -dome tweeter delivers the final three -plus octaves of response. Active electronic filtering, supplied in the form of two external electronic crossovers (one per speaker), integrates the four drivers to preserve signal purity. Price: $35,000 /pair. B &W Nautilus Project Speakers Opto-Link Detachable -Face CD-Player/Receiver The XC -6725D automotive CD player /receiver from Sherwood Electronics (14830 Alondra Blvd., La Mirada, CA 90638) features a detachable panel with me, "Opto-Link." The patent -pending Opto -Link system is said to supply con- O. advanced optical in- sistently clear sound through a "technologically efficient, ._..__ frared multiplexed design" that provides a stronger connection between the face that is normally panel and the unit. The system replaces the mechanical connector - - _ :Ni M,,,, used, and which is subject to marginal connections due to high resistance and t contact tension, as well as normal wear and temperature fluctuations. The XC -6725D also features EZ Link for fast, easy installation. The CD player uses a "dual floating anti -vibration damping system" to avoid skips when driving on rough roads. The Compu -Thner Plus features auto store and preset memory scan Sherwood Opto -Link CD Player /Receiver for 24 stations. Price: $385. Steadyshot Handycam The CCD -TR700 Hi8 Handycam, Sony's (1 Sony Drive, Park Ridge, NJ 07656) top-of -the line consumer model, features the "SteadyShot" picture- stabilization system. SteadyShot technology uses horizontal and vertical sensors to detect camcorder motion (caused by shaky hands or sudden movements) and then stabilize the image before it is recorded. Aimed at serious videomakers who do a lot of editing, the CCD-TR700 offers automatic digital recording of RC time -code reference data in hours, minutes, seconds, and frames. An advanced color viewfinder with optical filter provides an enlarged viewing area and more natural color. Other features include AFM Hi -Fi stereo sound with stereo zoom micro- phone, an optical 10:1 variable -speed power zoom, a manual focus ring, and four auto -exposure modes. Price: $1900. Sony Handycam with SteadyShot 73 www.americanradiohistory.comAmericanRadioHistory.Com ELECTRONICS WISH LIST Fiber -Optic A/V Cables According to ASM Labs, Inc. (410 East O'Dell Street, Marionville, MO 65705), their new Mongoose cable is the first fiber -optic cable system for stereos, VCR's, and other home audio and video gear. The Mongoose cable uses analog optical signals to send information up to a distance of 2.4 miles while "eliminat- ing the noise, interference, and attenuation associated with wire cables." The all - analog format means no digital conversion is necessary, so there is no loss of information, jitter, or need for error correction. The system includes a small electronic transmitter that plugs directly into an audio or video component and converts the output signal to an optical signal. The signal is sent over the fiber cable, which ends in a receiver that converts the optical signal back to an electrical impulse. The small receiver plugs directly into the component via a standard RCA-type connector. The transmitter and receiver are powered by separate, isolated, linear power supplies. As with wire cable, each channel of audio or video information requires its own optical cable, but several pairs of optical fiber can be run in the space needed for one pair of wire cables. The optical fiber cable has a 3mm outside diameter and is lighter and more flexible than wire cable, but far more expensive. Prices: Set of transmitters and receivers for stereo audio (includ- Mongoose Fiber -Optic A/V Cable System ing four power supplies), $649. Transmitter and receiver for video (including two power supplies: $369. Twin -lead optical cable for audio: $125 for the first meter, $10 each additional meter. Single -lead video cable: $62.50 for the first meter, $5 for each additional meter. Telephone With Equalizer Radio Shack's (700 One Tandy Center, Fort Worth, TX 76102) ET-145 ampli- fied equalizer telephone has convenient slide adjustment controls that allow users to set the sound frequency and volume to the levels that they find most comfort- able. That feature is particularly useful to hearing -impaired people, as is the phone's compatibility with hearing aids that use a "T" (telephone) switch. The ET-145 features a built -in, four-band equalizer, similar to those found on some stereo receivers. Advanced circuitry blocks feedback and other electronic noises at higher volume levels to enhance sound quality. Other features include a ring - indicator light that flashes when the phone rings, memory dialing for up to three numbers, and last- number redial. Price: $99.99. Radio Shack Telephone with Equalizer Modular Mini -System The GX -5 mini -system from Yamaha Electronics Corporation, USA (6660 Orangethorpe Avenue, Buena Park, CA 90620) consists of a pair of speakers and two electronics modules. One module contains the cassette -deck transport and amplifier, while the other houses the tuner, pre-amp controls, and a three -disc CD changer. The 35- watt- per -channel amplifier features Active Servo Technology, a complementary amplifier/speaker system that uses negative -impedance feedback and other electronic processes to derive strong, accurate bass from small speakers. The dual auto -reverse, dual -well cassette deck features Dolby B and C noise reduction, timer -record/play, two -speed dubbing, relay play, and CD Synchro Start for easy recording of CD's. The three -disc changer, with complementary Synchro Start circuitry, features PlayXchange, which allows two of the discs to be swapped while the third is playing. The AM/FM tuner offers 40 presets, auto - tuning, and 10 -key direct search. The pre-amp has an input for two additional auxiliary sources. The GX -5 also features a signal processor with settings for different types of venues and music types; wake-up, sleep, and auto power-off 74 Yamaha Mini -System modes; a seven -band graphic equalizer; and a spectrum monitor. Price: $599. www.americanradiohistory.comAmericanRadioHistory.Com We describe the first dealer - installed navigation /information go? You uant,tn Where do system to hit the streets in North America. BY BILL SIURU Navigation Systems go Mainstream Buyers of the Oldsmobile located In the trunk is used to do the Oldsmobile, the dead reckoning is Eighty-Eight LSS in California dead -reckoning computations as very good, so DGPS is not needed. For are now able to order an on- well as triangulating the signals from more information on the GPS system, board navigation and information GPS for position updating and for the see the July 1992 issue of Popular system as a dealer -installed option. map -matching function. Electronics. The system costs about $2000. The system includes automatic sen- While several aftermarket naviga- sor compensation and a state- of -the- The Interface. Information is pre- tion systems are already on the mar- art intelligent filter for minimum posi- sented to the driver or front -seat pas- ket here, Oldsmobile is the first auto tion error. However, the system does senger on an active -matrix color, maker to "officially" offer such a sys- not use differential GPS (DGPS) to liquid -crystal display (LCD). The dis- tem in North America. By comparison, overcome Selective Availability -a play screen measures four inches di- an estimated 400,000 automotive standard in which GPS data has re- agonally. The display /control unit navigation systems are already in- duced accuracy to limit its benefit to attaches to the center of the stalled in Japanese vehicles, and they a warring enemy. According to dashboard on an arm like the one are now being sold at the rate of that supports a rear -view mirror. The some 150,000 units annually. system has been designed for theft protection with the computer safely How it Works. The Oldsmobile Navi- ocated in the trunk. The combination gation /Information System was de- control unit /display screen is easily re- veloped by Zexel USA Corporation, a moved for storage In a secure loca- subsidiary of the Japan -based com- tion. pany, in its Sunnyvale, CA laboratory. The system's basic control opera- The system was modified somewhat tions include: from the Zexel NAVMATE to meet spec- Route /Map Key-That key permits ifications set by Oldsmobile and GM's the driver to switch between item -by- Delco Electronics. item travel -route instructions and area The Oldsmobile system uses dead - maps. reckoning navigation and digital Option Key- Brings up optional dis- map -matching with position updates play screen to control zoom for maps from the Global Positioning System and voice volume. (GPS). The GPS signals from the space Enter Key-Enters the driver's selec- satellites are received by a small an- tions into the computer. The LCD screen for the Oldsmobile Navi- tenna. Dead reckoning is done using Cancel Key-Cancels the current gationllnformation System is conveniently operation and reverts to the previous data from an electronic odometer located for viewing by the driver. Here the and a low -cost, vibration -type gyro- driver is entering the requested destina- step. scope, which determines the direc- tion via the easy -to -use menu. (Photo Cursor Buffon-Moves the cursor tion of travel. A small computer courtesy of Oldsmobile.) through menu functions. Also moves www.americanradiohistory.comAmericanRadioHistory.Com icon on map display. (Push and hold for quick scroll.) The system is designed for very easy use without special training or even reading of a complicated owner's manual. Once a destination is en- tered, the system calculates a route and displays it on a simplified digital map. It then provides graphic, turn - by -turn directions with a voice prompt shortly before each recommended maneuver has to be made. Operation The touch of a single key activates the Navigation /Information system. The menu- driven display screen then prompts you through a few simple steps to enter the desired destination using the cursor. The desti- nation, which is entered with the car stationary, can be a specific address, a road intersection, or a point of inter- est such as a gas station, hotel, school, hospital, or tourist attraction. The desti- nation can also be a previous desti- nation with the system capable of storing up to 10 previous ones for later recall. The on -board computer calcu- lates the recommended route in just seconds. A map of the area is then displayed on the screen with the proposed route highlighted in a bright color. As the driver makes the trip, the distance to "Turn -by- turn" route guidance provided by simple arrows is augmented by synthesized - the is destination presented on an- voice instructions. The screen also shows the distance to the next required maneuver as other display along with turn instruc- well as the direction and distance to the final destination. (Photo courtesy of Oldsmobile.) tions displayed with a simple arrow. About iwo tenths of a mile in advance of each turn, a computer -synthesized audible commands allow the driver's "Points of Interest" menu, then the spe- voice says "turn left" or "turn right." The attention to remain on the road. cific destination point desired. Nav- The system also permits the selec- Tech is currently adding 44 points of tion of a preferred route, for Instance, interest categories to the database. Oldsmobile via expressways or freeways versus sur- Those Include banks, shopping cen- face streets. If the driver strays off ters, airports, and more. course, misses a turn, or cannot take Initial systems sold in California will the suggested route because of con- include data for the entire state. struction or congestion, an "off-route Oldsmobile plans to offer the system detection" capability calculates a nationwide in the next two years. By new route to the destination. the end of 1995, Oldsmobile says it will The digital -map databases and offer map data for the 44 most popu- route -guidance software are pro- lous US metropolitan areas, plus the US vided by Navigation Technologies highway system down to the level of (NavTech) in Sunnyvale, CA. The dig- county roads. ital map data is stored on a 1.8 -inch The system is especially useful to PCMCIA card. The computer newcomers to an area since it can database "knows" the names of pinpoint tourist attractions, airports, streets, which streets are one way, retail stores, hotels, restaurants and so A simplified map is used for maximum where left turns are legal, when a turn forth. For that reason, Avis Rent -A -Car. ease of viewing by the driver. The recom- is 90 degrees, or when it is sharper or the first volume customer, will add 100 mended route is shown in a different color more gentle. Eighty Eights equipped with the Navi- with the current location shown by the Fora "Yellow Pages" feature, the op- gation /Information System to its fleet arrow. (Photo courtesy of Oldsmobile.) erator first selects a category from the in the San Francisco Bay area. www.americanradiohistory.comAmericanRadioHistory.Com COMPUTER BITS By Jeff Holtzman Knowledge is like a web. tool for increasing your and Grant Proposals. In fact, knowledge is a "OQ." The database web, a vastly complex and component consists of a interconnected network of IDEAFISHER three -level topical associated concepts and IdeaFisher consists of two hierarchy, augmented by facts. Take your average major components: a 750,000 cross references or Windows help file and mul- hyperlinked, associative hyperlinks. The topic tiply it by a billion, a trillion, database of ideas (Idea hierarchy is: Major IdeaFisher or maybe even infinity and Bank), and several sets of Categories, Topical that's the scale of the sum structured questions Categories, and Idea of human knowledge. Of designed to help you focus Words and Phrases (IWP). course there is, as yet, no on a problem (Question The current version of the physical entity correspond- Bank). An integrating shell program includes ing to this knowledge presents the questions, approximately 65,000 items network. That's what the "in- helps you navigate the at the IWP level. formation superhighway" database, records your Unlike some programs of and the ongoing con- answers along the way, and this nature, you can jump in vergence among the helps you filter and analyze to either the I -Bank or the computer, communication, them. Q -Bank at any level and publishing, and entertain- The basic product comes start exploring. However, the ment industries are all with half a dozen question company does about. sets, covering the following recommend following a structured approach, ...... _ ja IdeaFist,er Im Windews ol detailed in the book, but Ene Ldlt 9Benk'' IdeaBank Window Help only weakly supported by ®I®i[1I0I Ell [3] CI C2E ab d the software. The company Mu L7". f.nnnr.elinn Ms@dnr Irnmpulrrl , R7 would do well to add a¡ i arrang e/sort/cl asslt.q computer card (option card) computers/software/robots "Wizard" or "Assistant" oemputen/sefwarehebsts fastenenhd he sivesffasts nlattaoh to Connection Machine (computer) physlcs/mattte mattcs technology optionally speed/fast/slow walk users through program technology/englneartngAnventions/pretotypes tools/machinery components step by step. PROS AND CONS My initial impression of the program was not particularly favorable, although it has grown on me in subsequent uses. I find its screens inelegantly IdeaFisher helps increase your "Originality Quotient" (OQ) with an extensively designed, its icons obscure, hyperlinked idea database, and structured goal- and focus- setting. and its undifferentiated use of different types of Nonetheless, there are areas: New Product and windows confusing. I also compelling reasons to be Product Development, find the 65,000 -item IWP able to tap into that net- Name Development, database thin. At first, I work today: business, Marketing Strategy, often selected items entertainment, education, Advertisement and expecting to get more and more. Another reason Promotional Material, Story information, as in a is to increase your "origi- and Scriplwriting, and a thesaurus or encyclopedia, nality quotient," your ability general -purpose module but instead ended up to be original, to come up for Problem Solving. The moving to another node in with fresh, new ideas, re- company also sells add -on the database. gardless of your field of modules for Strategic IdeaFishers awkward endeavor. A Windows pro- Planning, Speeches and method of navigating gram called IdeaFisher is a Presentations, and Business topical categories drives www.americanradiohistory.comAmericanRadioHistory.Com me crazy. For example, like this ad infinitum. Each reports, articles, white THINK TANK search on the word time you go to a new item, papers, and the like. (Continued from page 26) "compute" and you end up its name is added to a text - Despite all those faults, I at the beginning of an editing window that acts as can't simply erase the alphabetical list of 65 a kind of shoebox, program from my hard disk. TRACK -CONTROL computer- related topics. A collecting new ideas as you I find that the questions SIGNAL program of this type should traverse them. Later, you asked in the Q -Bank can be One of the areas of elec- never present long lists; it can filter the shoebox to highly useful in helping tronic circuitry that has should always break things extract the key concepts. scope a problem. been largely overlooked in down into digestible Suppose though, that I truly believe that the your column is that of hierarchical groups. after some hyper - company is on to something. model trains. I have been To continue the example: navigating, you come to With a better user interface searching for the past cou- Select "computer the end of an idea trail. and a more extensive, less ple of years to find a circuit language" and up pops a Now you want to return to pop- culture oriented to operate a flashing cross- new list containing four the last major fork in the database, IdeaFisher could ing guard using 12 -volt DC items: computers /software/ road and take the other be a great weapon in the lamps. Just about all the robots, information transfer/ branch. Doing so is arsenal of people who de- common circuits available information systems/ possible, but awkward. The mand more of themselves. use LED's and they are way libraries, instructions/orders/ program desperately Let's hear it for a CD -ROM too big for N -gauge scale commands, and language/ needs some sort of interac- version and a more extensive models. I have two Radio foreign languages. Select tive, graphical representa- editorial process! Shack 272 -1092 lamps. Now one of those topics and up tion of the paths you take. I need a circuit that will pops a dialog allowing you One last gripe: Although Vendor Information handle those tiny bulbs. to view example items in the areas included in the Sure hope you can come IdeaFisher ($199) basic Q -Bank are useful, I up with a circuit that does one of several categories. IdeaFisher Systems, Inc. not use a relay to operate As soon as you select one, find one glaring omission: 2222 Martin St., #110 yet another list replaces the There should be a question Irvine, CA 92715 my crossing guard. current list. You can group concerned with (800) 289-4332 I am enclosing a circuit continue hypernavigating writing nonfiction essays, (714) 474 -8111 diagram (see Fig. 4) for a track -side operating signa that remains green until ar Ntz engine, with a small mag- Whether you wish to save money, net glued to the underside boldly go where no guitarist has gone comes along and trips the before or simply have fun building reed switch in the track. Th electronic gadgets designed for your light turns red and remains musical pleasure, then read red for a time, depending on the setting of R1 and Electronic Projects for value of Cl (see the table in the figure), and then re- mil =TAR turns to green. Many thanks for interest- Some of the add -on guitar ing columns. gadgets you can build are: Bob Williams, Hemet, $1295 CA Preamplifier Headphone Amplifier Soft Distortion Effects Unit I guess you'll be happy Compressor Auto -waa Waa -waa Pedal Phaser Dual Tracking with the circuit back in Fig. Effects Distortion Unit Expander Dynamic Treble Booster 3. To use that circuit with Direct Injection Box Dynamic Tremelo Thin Distortion Unit your size railroad model, fr and Guitar Tuner. using mini or sub -mini LED: Anyone with some previous electronic project building experi- By the way, the only rea- ence should have no problem assembling the projects. son I haven't covered the model- railroad hobby is b ELECTRONICS TECHNOLOGY TODAY INC. P.O. Box 240, Massapequa Park, NY 11762 -0240 cause I've received almos no mail on it. Yes, send my copy of ELECTRONIC PROJ- Please charge my Ll Visa n MasterCard Well, "that's all folks" for ECTS FOR GUITAR by RA Penfold to the Signature address at right I am enclosing $12.95 plus this month. To participate i $2 95 for shipping charges in USA and Can- Account No. Expir. Date the column, please write tc ada. All payments must be made in US funds. no orders accepted outside of Tank, Elec- Sorry, Name Think Popular residents USA and Canada. New York State tronics, 500 -B Bi- County add local sales tax. Allow 6 -8 weeks for Address delivery. Blvd., Farmingdale, NY State ZIP 1 Check enclosed. City 11735. 78 www.americanradiohistory.comAmericanRadioHistory.Com - l ive a Friend Q Year of IH1ectro n ics `Fun this CII ris tnt a s .7 Does fighting the crowds at Christmas short -cir- SAVE MONEY...A great gift to receive, Popu- cuit your holiday fun? Don't blow a fuse this lar Electronics is also a great gift for you to year...for the friend who shares your love of give! The Special Holiday Rate saves you project- oriented electronics - or a youngster $25.05* off the newsstand price on each gift. who may need only a spark to ignite a life -long You can save another $25.05* when you start or interest - give a gift subscription to Popular extend your own subscription at the same time. Electronics. It's our "thank -you" for sharing Popular Elec- tronics with a friend at Christmas. Popular Electronics readers get the know how they need to build exciting, educational, and Send no money, unless you prefer. We'll be glad useful projects like these...a professional -qual- to bill you in January, 1995. Just take a brief ity home -security system...an autoranging fre- moment to go over your gift list and make sure quency counter...a nine -band shortwave re- you haven't forgotten anyone who might ap- ceiver...a radio -controlled car...a telephone preciate the many benefits of Popular Elec- r scrambler...an aviation receiver...and even a tronics. Then write the names on the attached robot! Gift Certificate and mail it back in the postage - paid reply envelope...we'll take it from there! N PLUS...Gizmo, our honest and straight- shoot- ing review of the latest consumer -electronics Your friends will receive a handsome gift an- gear...Market Center, featuring mail -order nouncement card signed with your name just merchants that are ready to help you in all your before Christmas. And all through the new year hobby activities...articles and columns cover - they'll remember and appreciate your thought- ng every aspect of the electronics hobby - ful gift! So dont blow a fuse...take it easy and including antique radio, shortwave listening, enjoy the holidays. Give Christmas gifts of Pop- ham radio, computers, scanners, circuit de- ular Electronics! sign, and more! Popular Electronics 'Basic sub rate -1 yr/$21.95 www.americanradiohistory.comAmericanRadioHistory.Com ELECTRONICS MARKET PLACE FOR CABLE descramblers and test turn -on kits avail- CABLE converters, accessories below whole- SALE able for most makes and models. No catalog, no sale! Immediate delivery from giant stock! COD CABLE test chips. Jerrold, Tocom, S.A., 800 number equals your lowest prices. Call orders only! 1 (800) 995 -1749. others, then compare our prices! We repair most Zenith. Puts cable boxes into full service FREE CD -ROM and shareware catalog. Great cable equipment, and pay cash for unwanted ca- model S29.95 to $59.95. 1 (800) 452-7090, (310) prices, free disks. DATA MATE PRODUCTS, Box ble boxes. No Florida sales. (305) 425 -0751. 902-0841. 2811, Lake Ronkonkoma, NY 11779. 300 Experimenters Circuits - Complete in 6 practical books using diodes, relays, FET's, LED's, IC 555's, and IC CA3130's for building blocks. Only $33.00 plus $5.50 for shipping. USA CLASSIFIED AD ORDER FORM and Canada only. US funds. ETT, INC., PO Box 240, Massapequa Park, NY 11762 -0240. to: To run your own classified ad, put one word on each of the lines below and send this form along with your check Popular Electronics Classified Ads, 500 -B Bi- County Boulevard, Farmingdale, N.Y. 11735 PLEASE INDICATE in which category of classified advertising you wish your ad to appear. For Video Stabilizer ELECTRONICSNJU -TE1< special headings, there is a surcharge of $11.00. Plans /Kits ( ) Business Opportunities ( ) For Sale Education /Instruction ( )Wanted ( )Satellite Television $4995 ( ) G40og CABLE TV Special Category: $11.00 EQUIPMENT PLEASE PRINT EACH WORD SEPARATELY, IN BLOCK LETTERS. (No refunds or credits for typesetting errors can be made unless you clearly print or type your copy.) Rates indicated are for standard style classified ads only. See below for additional charges for special ads. Minimum: 15 words. 1 2 3 4 5 1 -800- 228 -7404 NEW 6 7 8 9 10 PICTURE 11 12 13 14 15 ($23.25) IN PICTURE Stereo PIP WORKS ON ALL TV'S, 181 CHANNEL CAPABILITY, 4 SOURCE INPUTS REMOTE CONTROL, 16 ($24.80) 17 ($26.35) 18 ($27.90) 19 ($29.45) 20 ($31.00) I: -4.11::; ól UPs 3250 Hatch Cedar Park TX 78613 21 ($32.55) 22 ($34.10) 23 ($35.65) 24 ($37.20) 25 ($38.75) 26 ($40.30) 27 ($41.85) 28 ($43.40) 29 ($44.95) 30 ($46.50) THE Case Against Patents. Thoroughly tested and proven alternatives that work in the real world. $28.50. SYNERGETICS PRESS, Box 809 -C, Thatcher, AZ 85552. (602) 428-4073. Visa/MC. 31 ($48.05) 32 ($49.60) 33 ($51.15) 34 ($52.70) 35 ($54.25) CABLE TV /descramblers 2 year converters We accept MasterCard and Visa for payment of orders. If you wish to use your credit card to pay for your ad fill on Jerrold, Zenith, Tocom, Scientific warranties in the following additional information (Sorry, no telephone orders can be accepted.): Atlanta. We service most converters. Money back guarantee. NATIONAL CABLE SERVICES (219) 935 -4128. your own SECRET cable descramblers! Build Expiration Date descrambler for less than $12.00 in seven easy Card Number steps! Radio Shack parts list and free descram- bling methods that cost nothing to try, included. Send $10.00 to: INFORMATION FACTORY, PO SIGNATURE Box 669, Seabrook, TX 77586. For COD's (713) PRINT NAME 922-3512 any time! tin PRINTED circuit boards - etched, drilled, PERMANENT ADDRESS AND PHONE IF YOU USE A BOX NUMBER YOU MUST INCLUDE YOUR $1.25/sq. inch. Free shipping. plated. Single sided NUMBER FOR OUR FILES. ADS SUBMITTED WITHOUT THIS INFORMATION WILL NOT BE ACCEPTED. CHELCO ELECTRONICS, 61 Water Street, May- CLASSIFIED COMMERCIAL RATE: (for firms or individuals offering commercial products or services) ville, NY 14757. 1 (800) 388 -8521. $1.55 per word prepaid (no charge for ZIP code)...MINIMUM 15 WORDS. 5% discount for same ad in 6 issues within one year; 10% discount for 12 issues within one year if prepaid not applicable on credit card orders. NON -COMMERCIAL RATE: (for individuals who want to buy or sell a personal item) $1.25 per word, prepaid....no minimum. ONLY FIRST WORD AND NAME set in bold caps at no extra charge. Additional bold CB RADIO OWNERS! face (not available as all caps) 30C per word additional. Entire ad in boldface, $1.85 per word. TINT SCREEN BEHIND ENTIRE AD: $1.90 per word. TINT SCREEN BEHIND ENTIRE AD PLUS ALL BOLD We specialize in a wide variety of technical FACE AD: $2.25 per word. EXPANDED TYPE AD: $2.05 per word prepaid. Entire ad in boldface, $2.45 per information, parts and services for CB word. TINT SCREEN BEHIND ENTIRE EXPANDED TYPE AD: $2.55 per word. TINT SCREEN BEHIND TYPE AD PLUS ALL BOLD FACE AD: $2.95 per word. DISPLAY ADS: 1" x radios. 10 -Meter and FM conversion kits, ENTIRE EXPANDED $205.00; 2" x 2'/a-$410.00; 3" x 21/8'-$615.00. General Information: Frequency rates and prepayment repair books, plans, high -performance discounts are available. ALL COPY SUBJECT TO PUBLISHERS APPROVAL. ADVERTISEMENTS accessories. Thousands of satisfied USING P.O. BOX ADDRESS WILL NOT BE ACCEPTED UNTIL ADVERTISER SUPPLIES PUBLISHER WITH PERMANENT ADDRESS AND PHONE NUMBER. Copy to be in our hands on the 18th of the customers since 1976! Catalog $3. fourth month preceding the date of issue (i.e.; Sept. Issue copy must be received by May 18th). When CBC INTERNATIONAL, INC. normal closing date falls on Saturday, Sunday or Holiday, issue closes on preceding work day. Send for the classified brochure. Circle Number 49 on the Free Information Card. AZ 85046 80 P.O. BOX 31500PE, PHOENIX, www.americanradiohistory.comAmericanRadioHistory.Com * 1994 CATALOG k BEST BY MAIL Learn to fix computers, F Rates: Nationel,Box 5, Sarasota, FL 34230 OF THE WORLD'S MOST FAMOUS Write I Home study. Earn great money repairing I MONEYMAKING OPPORTUNITIES troubleshooting, upgrading, and installing CB ANTENNAS & ACCESSORIES PCs. Free Mentors: 800- 223 -4642. R EARN $50041000 WEEKLY stuffing envelopes. For details Nam. Ag. I - Rush $1.00 with SASE to: KAPPaONE, PO Box 220, Clari- I E FIRESTIK ANTENNA on, PA 16214. Address - - city et.ta _ Zip E. RECEIVE $250,000+ CASH! NO JOKE! SASE: KERNS -(PE), I I 2614 Adams Phoenix, AZ 85034 The School of PC Repair, Dept. JJL341 BOX 45488, TACOMA, WA 98445. E Write or Call, 602 -273 -7151 IMO" 8065 Roswell Road, Atlanta, Georgia 303281 OF INTEREST TO ALL - O M M - - - M FREE CD OR TAPE every time you buy another! Save hun- dreds $$$! Complete details: Fine Tune Marketing, Post Of- fice Box 7269 -(PE), Sussex, NJ 07461. HOW TO BUY FEDERAL surplus property. Simple instruc- tions. $1.00: DECY, Box 1294, Severna Park, MD 21146. EDUCATION /INSTRUCTION CABLE descrambler liquidation. Major makes REAL MEN USE SCISSORS! Quality stainless set of 4: nose ELECTRONIC 8 volumes and models available. Industry pricing (example: hair, mustache /beard, "Ice" haircutting, and one pair utility engineering. com- Hamlin combos, 544.00 each...minimum 10 or- shears for your Workshop! $16.95 pp. SCISSOR LADY, 72 plete. $109.95. No prior knowledge required. Free ders). No California sales. WEST COAST ELEC- Brink Road, Wantage, NJ 07461. brochure. BANNER TECHNICAL BOOKS, 1203 Grant Avenue, Rockford, IL 61103. TRONICS, 1 (800) 628 -9656. SPEAK A FOREIGN LANGUAGE. MAKE EASY PART -TIME MONEY. CALL 1.310.827.1248. BECOME an electronics engineer! Money for col- PROTECT yourself and cash in on crime, security Instructions RECYCLE PERSONAL COPIERS Cartridges. lege available. Call (609) 266 -2887 ext. 112 for devices catalog and special offer, $5.00, write $14.95. Charles Bruns, Box 543, Applegate, CA 95703. GEMINI ENTERPRISES, PO Box 1558, Bristol, recorded message. CT 06011 -1558. BECOME an amateur radio operator ham. Infor- mation how $3.00 D &S INT., PO Box 73560, Met- airie, LA 70033 -3560. PLANS & KITS WHAT DIGITAL electronics, learn at home or college for N'oul: digital computers, full color illustrations 360 in two easy - ftv 60 Soiderless Breadboard Projects pages. Send $29.95 to PJ ENTERPRISES, Complete with circuit de- rsnrrrw HAPPENED to- read pocket books. t2tit'L tYt- 26551 Sparks St., Highland, CA 92346. scriptions, schematics, parts layouts, component listings, etc. Both books (BP107 & BP113) only ON THE DAY ELECTRICITY /Electronics training series used $11.90 plus $3.50 tor shipping. USA and Canada by US military. 24 volumes, other courses avail- only. US funds. EU, INC., PO Box 240, Massape- prepared Free info: FEDERAL TECHNICAL PUB- for you¡YOU WERE qua Park, NY 11762 -0240. lust USHERS, Box 1218 E, Glen Lake, MN 55345. SCHEMATIC design program, Free brochure. BORN? Write Dep SCHEME-ADDICT, 8622 W. 44th Place, P., Ridge, This special report is made to order for you LASER plans. Build your own laser. Diagrams, or the person you specify. Tells who shares construction tips, part sources. $6.00. Satisfac- your birthday (many famous people dol) Gives tion guaranteed. K. HARRIS, PO Box 290729, ANTIQUE RADIO CLASSIFIED Phelan, CA 92329 the headlines, the sports events, the songs, Sample! the movies, the price of items back then, and Antique Radlc s much more! Suitable for framing! Largest Circulation Monthly. O Articles,, rtic I es, P,d s &Classifieds. GIVE A COPY to a friend or family member! MAY THE 6 -Month Trial: $16.95. 1 -Yr: $31.95 ($47.95 -1st Class). Makes a wonderful gift that will be long A.R.C., P.O. Box 802 -L12, Carlisle, MA 01741 remembered! We will send it to you or the per- SOURCE son you specify! Do your gift shopping this ' quick, easy way! Not available in stores! BE WITH .' Give us the birthdate (month- day -year), the BUSINESS OPPORTUNITIES full name, and (if you know it) the state the MAKE $75,000.00 to $250,000.00 yearly. Learn person was born in. IBM monitors repairs (solutions most brands). New home based business program. Software 1 Each copy will be personalized with the reci- available. Information: USA -Canada $3.00 cash Dealers wanted worldwide ($35.00) e e pient's name and birth information and printed ino checks), YOU IJS funds. RANDALL DISPLAY, PO Box 2168 -H, on gold parchment -like paper and placed in a Van Nuys, USA. Don't let the dark forces of ignorance CA 91404, beautiful presentation portfolio. Only $9.95, or EASY work! Excellent pay! Assemble products at defeat you. Right in this galaxy, you 2 for $17.50 (we pay shipping and tax!). Get home. Call toll free 1 (800) 467-5566 ext. 5730. can tap into th? source -- the free one for yourself! START your own technical venture! Don Lan- CONSUMER caster's newly updated Incredible Secret Money To order, call right now: Machine II tells how. We now have autographed INFORMATION copies of the Guru's underground classic for 1- 800.900.8974. Or mail order to: CATALOG. It lists $18.50. SYNERGETICS PRESS, Box 809 -C, Conrad Germain, Dept 726 -PE, 2020 Penn- Thatcher, AZ 85552. (602) 428 -4073. Visa/MC. more than 200 sylvania Ave., Washington DC 20006. Money free and low - back guarantee) Visa, MasterCard welcome! cost INVENTIONS govern- FREE Invention package: DAVISON & ASSO- ment CIATES offers customized development, patent- ing, and licensing for new products and ideas. pub- TELEVISION VIDEOS Proven results: 1 (800) 677 -6382. lications INEXPENSIVE, proven, colorbar generator al- ternative! Crosshatch, dot matrix, and more on on a variety of high grade VHS. 30 minutes. Only $23.95. DLO important topics. So DISTRIBUTORS, 429 Cessna Road, Concord, NC 28025. r dispel the darkness and get the source. Just send your name learn VCR repair! Home study. Loam high -profit repairs and address tc : without investing in high -tech instruments. I FREE BOOKLET. 800 -223 -4042. Consume- Information Center MASTERCARD AND VISA are now accept- II Name Age ed for payment of your advertising. Simply Address Department Source City State- Zip I2 complete the Classified Ad order form and The School of VCR Repair, Dept. VRL341 Pueblo Colorado 81009 LH765 Roswell Road, Atlanta, Georgia 30328 we will bill you. I M-- E M M M M J 81 www.americanradiohistory.comAmericanRadioHistory.Com CIRCUIT CIRCUS By Charles D. Rakes Mot too long ago a IN friend asked how he PARTS LIST FOR THE could check his computer's GLITCH DETECTOR (Fig. 1) power supply to see if it was producing or passing glit- SEMICONDUCTORS ches that were causing his Ul-LM324 quad op -amp, integrated circuit rectifier computer to lock up and /or SCRI- 2N5061 0.8 -amp, 60 -PIV, silicon -controlled LED1- Light- emitting diode (any color) to lose data. So I offered the detector circuit shown RESISTORS in Fig.1. (All resistors are 1/4-watt, 5% units.) Rl, R2- 10,000 -ohm Monitor/ THE GLITCH DETECTOR R3 -4700 -ohm R4 -1000 -ohm In the Fig. 1 circuit, two Detector op -amps (half of an LM324 CAPACITORS quad op -amp) and an SCR C1-0.1-11,F, ceramic -disc Circuits are direct coupled in a DC- C2- 100 -i.F, 16 -WVDC, electrolytic voltage monitoring circuit. ADDITIONAL PARTS AND MATERIALS Op-amp UI -a is configured SI- Normally open pushbutton switch as a voltage follower, which Perfboard materials, enclosure, IC socket, 12 -volt power source, feeds the bridged inputs of wire, solder, hardware, etc. the second op-amp, UI -b. A +12V input, causing its output to also be used to monitor an c2 go high, triggering SCR1 AC power source by modi- 100 light. fying the input circuitry (as R1 and causing LEDI to 10K The circuit's sensitivity allows shown in Fig. 2) by con- it to detect voltage necting UI -a's non -inverting _6 changes in the millivolt input (pin 3) to a fixed DC U1a range. Pressing S1 diverts voltage. Resistors R1 and R2 DC 3 R2 1/4 LM324 a voltage divider that INPUT + 10K c1 the SCR's holding current to form 11 ,r ground, causing it to turn off feeds half the supply volt- R4 R3 and reset the circuit. age to the non -inverting 1K 4.7K input of UI -a. If the +12V AC NOISE DETECTOR monitored voltage shifts up LED1 The glitch detector can or down, the change is Si SCR1 2N5061 passed through Cl to the RESET +9V y input of UI -a, and on to the R1 inputs of UI -b, causing SCR1 Fig. 1. In the Glitch -Detector circuit, two op -amps (half of a 100K (Fig. 1) to turn on, lighting LM324 quad op- amp) -one of which, UI -a, is configured as a LEDI. voltage follower-and an SCR are direct coupled in a DC voltage To desensitize the circuit, 101111111°' 1/4 LM324 monitoring circuit. I1C1 a resistor can be added in .1 R2 100K series with Cl. In fact, you OUTPUT resistor AC might consider using a po- /capacitor combina- INPUT tion (R2 /C1) connected to tentiometer in series with Cl the negative input of UI -b Fig. 2. The AC -Noise so that you can experiment Detector is a simple forms an RC time -delay cir- with different resistance val- adaptation of the glitch cuit. As long as there is no ues to obtain the desired detector, in which the input sensitivity. change in the DC- voltage circuitry has been modified UI -b's in- level at either of by connecting Ul -a's non - puts, its output is near zero. inverting input (pin 3) to a LIGHT DETECTOR If a voltage glitch occurs, fixed DC voltage, and Watching a TV sur- the RC timing circuit will coupling the input to the veillance monitor with "fixed delay the voltage change circuit through a capacitor eye" all day can be a bor- 82 at the op -amp's inverting (C1). ing task. The monitoring www.americanradiohistory.comAmericanRadioHistory.Com circuit in Fig. 3 is designed Fig. 5 can be useful in to relieve the stress of that PARTS UST FOR THE keeping an eye out for volt- tiresome job. In that circuit, AC -NOISE DETECTOR (Fig. 2) age glitches or failures that Q1 and SCR1 are con- could cause computer nected as a simple light Ul -LM324 quad op -amp, intergrated circuit problems. The AC Power - detector. As long as suffi- Rl, R2- 100,000 -ohm, 1 -watt, 5% resistor Failure Monitor in Fig. 5 cient light hits Q1, it C1- 0.1 -1F, ceramic -disc capacitor keeps an eye on the AC Perfboard materials, conducts, keeping its col- enclosure, 9 -volt DC source, wire, solder, power line and sounds an hardware, etc. lector at near ground alarm whenever a power - potential. Under that con- line failure occurs. The cir- dition, no current flows to PARTS LIST FOR THE cuit requires only a few the gate of SCR1, so it re- LIGHT DETECTOR (Fig. 3) microamps of current dur- mains off. ing normal operation, rising If, on the other hand, the SEMICONDUCTORS to a few milliamps when an light source fails for a brief LED1- Light -emitting diode (any color) alarm is sounded. period, Q1 turns off, causing QI- ECG3031 or similar phototransistor In that circuit, the AC -line its collector to go high and SCR1- 2N5061 silicon -controlled rectifier voltage is fed directly to a supply current to the gate RESISTORS full -wave bridge rectifier of SCR1. That causes the (All resistors are %a -watt, 5% units.) (comprised of D1 -D4) SCR to turn on, thereby, R1- 10,000 ohm through a neon lamp and turning LEDI on. The LED R2 -1000 -ohm a current -limiting resistor ADDITIONAL PARTS AND MATERIALS (R1). The DC output of the C1- 0.1 -p,F, ceramic-disc capacitor bridge rectifier is applied to SI- Normally -open pushbutton switch the LED input of op- Perfboard materials, 9 -volt power source, wire, solder, hardware, toisolator /coupler U1. As etc. long as AC power flows, U1's that contains its own audio oscillator. DARKNESS MONITOR Our next monitoring cir- cuit, see Fig. 4, reverses the operation of the previous circuit, turning on LEDI Fig. 3. The Light Detector is when light is a designed to prevent detected. In security (and other that circuit, a 2N2222 gen- surveillance) personnel from eral- purpose transistor, Q2, suffering `fixed eyeball is added to the circuit in Fig. 4. The Darkness Monitor reverses the operation of the Light fatigue." Fig.3. The additional tran- Detector, turning on LEDI when light is detected. To reverse the sistor serves as an inverter, action, a 2N2222 general- purpose transistor, Q2, is added to the remains on until the circuit producing at its collector circuit to function as an inverter. is reset by pressing S1. the complement to the sig- By placing Q1 over a lit nal at the collector of Q1. area on a TV /monitor When there's no light hit- PARTS LIST FOR THE screen, the circuit becomes ting Q1, its collector voltage DARKNESS MONITOR (Fig.4) an electronic luminance is high, causing current to sentry. If something gets be- flow to the base of Q2, SEMICONDUCTORS tween the camera and the turning it on and pulling its LED1- Light -emitting diode, any color object under surveillance, collector low. With Q2's col- QI- ECG3031 or similar phototransistor Q2- 2N2222 general -purpose NPN silicon transistor the light level sensed by Q1 lector at near ground SCR1-2N5061 silicon -controlled rectifier drops, causing Q1's collec- potential, no current flows tor voltage to rise. That rise to the gate of SCR1, so it RESISTORS in voltage turns the SCR on, remains off. When light hits (All resistors are 1/4-watt, 5% units.) causing LEDI to light. Q1, its collector goes low RI, R2- 10,000 -ohm R3 -1000 -ohm If an audible alert is re- and Q2's collector goes quired, a piezoelectric high, turning SCR1 on and ADDMONAL PARTS AND MATERIALS sounder can be connected lighting LEDI. CI- 0.I -p,F, ceramic -disc capacitor across R2, so that when the SI-Normally -open pushbutton switch Perfboard wire, circuit is triggered, the buzz- AC POWER- FAILURE materials, enclosure, 9 -volt power source, solder, er sounds off, The piezo MONITOR hardware, etc. sounder should be the type The monitoring circuit in 83 www.americanradiohistory.comAmericanRadioHistory.Com 117VAC ing the LED in U1 to go out. ode and transistor pairs. The +9V At that point, the transistor first circuit (see Fig. 6) uses a in U1 turns off, causing its digital voltmeter (DVM) to R1 NE1 27K R3 collector current to rise, match the forward-voltage 470K Q1 IRF511 supplying two diodes. The --1 Dl-D4 a gate -bias cur- drop of 1 D1 D2I1N4004 rent to Q1, and causing it to circuit contains a bank of I- +I 1 ".J turn on. That causes current resistors (R1 -R6) that are I I R2 to flow through R5, lighting used to set the current flow I D3 D4 I 2.2K U2's internal LED, and tha +, through the two diodes (D1 4 in turn, U2's and D2) compared. Cl _ causes output being transistor to turn on, supply- The digital voltmeter func- U1 ECG3041 +9V R5 ing gate current to SCRI tions as a null meter, U2 1K it turn ECG3041 and causing to on. indicating any difference 2 Turning on SCRI causes cur- between the forward volt- rent to flow to the load age drop across the two +9V R7 -,-9V 10K Fig. 5. The AC Power -Failure Monitor is an electronic "snitch" that sounds an alarm whenever a power -line failure occurs. PARTS LIST FOR THE AC POWER- FAILURE MONITOR (Fig. 5) SEMICONDUCTORS Fig. 6. To match diode pairs with this circuit, simply in insert Ul, U2- ECG3041 optoisolatoricoupler, integrated circuit diodes of equal rating in the DI and D2 positions. When the SCRI- 2N5061 sensitive -gate, silicon- controlled rectifier DVM reading drops to zero or nearly zero, you have found a set. Ql- IRF51I HEXFET power FET Dl D4- 1N4004 1 -amp, 400 -Ply silicon rectifier diode LEDI- Light- emitting diode (any color) PARTS LIST FOR THE DIODE MATCHING CIRCUIT (Fig.6) RESISTORS (All resistors are 1/4-watt, 5% units.) RESISTORS RI- 27,000 -ohm (All resistors are' -watt, 5% units.) R2 -2200 -ohm Rl, R4-27,000 -ohm R3-470,000 -ohm R2, R5- 10,000 -ohm R4, R5 -1000 -ohm R3, R6-1000 -ohm R6-3300 -ohm R7- 10,000 -ohm ADDITIONAL PARTS AND MATERIALS D1, D2 -Diode under test (see text) ADDITIONAL PARTS AND MATERIALS Sl -DP3T switch C1- 0.1 -1.1.F, ceramic -disc capacitor Perfboard materials, enclosure, DVM, 9 -volt power source, wire, NE1 -NE2 neon lamp solder, hardware, etc. B21- Piezoelectric buzzer Sl-Normally -open pushbutton switch Perfboard materials, enclosure, IC sockets, molded AC power circuit, lighting LEDI and diodes. A zero or near -zero plug with line cord, 9 -volt power source, wire, solder, causing BZ1 to sound. DVM reading indicates a hardware, etc. The value of capacitor near perfect match. C1 can be increased to There are three test -cur- internal output- transistor is and the U2's input LED. Thus, make the circuit ignore fast rent levels available: When turned on, keeping its col- U2's output transistor re- or very short power inter- S1 is in position 1, the cur- lector at near ground mains off, and no current ruptions. You'll have to rent is limited to about 8 potential. flows through R7. With no experiment to determine mA in position 2, current is The gate of transistor Q1 current flow through U2's the capacitor value held to slightly less than 1 (an IRF511 power FET), which output transistor, no gate needed for your particular mA; and in position 3, is connected to the collec- bias is delivered to SCRI, application. about 300 mA is available. tor of U1's output transistor, is keeping it in the off state, so Although the current levels grounded through the out- the alarm will not sound. DIODE MATCHING available in the circuit were put of U1, keeping it biased When the power fails, the CIRCUIT selected for signal diodes, off. With Q1 biased off, no DC output of the bridge Our next two circuits are the available current can R5 to zero, caus- 90) 84 current flows through rectifier drops designed to help match di- (Continued on page www.americanradiohistory.comAmericanRadioHistory.Com DX LISTENING By Don Jensen A s fall approaches, it's a countries. Much of the pro- owned by one of Colom- rit good time to turn gramming you may hear is, bia's largest networks and some listening attention to for example, in Spanish or identifies by its name. While the shortwave tropical Brazilian Portuguese. CARACOL is actually an ac- bands. These are the lower Not long ago, Rich ronym for the full name, SW frequencies, so nick- McVicar, director of the Primer CAdena RAdial named because most of ANDEX listeners club at COLombian (meaning DX On The the stations operating with- HCJB, voice of the Andes, in Colombia's No. 1 radio - in these bands are located Quito, Ecuador, put to- broadcasting network), the Tropical in the tropics. More specifi- gether his suggested list of word caracol also means cally, there are four tropical the ten easiest countries to snail in Spanish. Bands SW bands: 120 meters, hear in the 60 -meter trop- VENEZUELA -Ecos del 2,300 to 2,495 kHz; 90 ical band. Rich says that Torbes broadcasts on 4,980 meters, 3,200 to 3,400 kHz; with so many powerful sta- kHz from the city of San 75 meters, 3,900 to 4,000 tions on the higher Cristobal in Venezuela's kHz; and 60 meters, 4,750 to shortwave frequencies, western state of Tachira. Its 5,060 kHz. many of them program- programs of Latin -American ming In English, many SWL's music and news, notes Rich, may be perfectly happy to often are the first things an tune only those above SWL will hear from Venezue- 1380 kHz 6,000 kHz. But, he notes, the la. Try tuning from around 4.82 mHz listener who shies away 0100 to 0400 UTC, when the from the lower tropical station signs off with Gloria bands "would be missing al Bravo, the Venezuelan the excitement, challenge, national anthem. and enjoyable listening HONDURAS -From available. Even though the Tegucigalpa, the Honduran LA VOZ EVANGELICA language may well be a capital, There's HRVC, La Voz Apartado 145 -C different one than that of Evangelica de Honduras, a Tegucigalpa, D.C. Honduras, C.A. the listener, the DX'er never- religious broadcaster that is theless can understand bits actually owned by the Con- and pieces, especially sta- servative Baptist Home Here is a verification card frotn HRVC, a Honduras SW station tion identifications." Rich Mission Society in Wheaton, that broadcasts in the 60 -meter tropical band. suggests these ten 60- IL. That station uses 5 kilo- meter targets for the SWL: watts of power on 4,820 These, admittedly, are not ECUADOR-Radio Quito, kHz. Its programs are mostly the frequencies that a be- La Voz de la Capital in In Spanish, but it does have ginning SWL might choose. Quito, capital of Ecuador. some English- language First, there is the "noise" All of their programming is programming from 0300 to problem during the warmer in Spanish, with lots of news 0500 UTC. months. During the summer and information shows. The COSTA RICA -TIFC, San months, static bursts on the frequency is 4,920 kHz, and Jose, Costa Rica, is another low SW bands can be un- 0200 UTC is a good time to widely heard Latin-Ameri- pleasant to the ears. But try. can religious broadcaster. that sort of Interference COLOMBIA-CARACOL in Its alternate name, Faro del tends to quiet down some- Bogota, Colombia, has a Caribe means Lighthouse what with the reduction of hefty 50- kilowatt signal on of the Caribbean. The 60- lightning storms as the 5,075 kHz, which should meter band frequency of northern hemisphere boom into many a listening 5,055 kHz should be the moves from summer to au- "shack" throughout North best option and it uses En- tumn. Then there is the America at around 0100 glish for its programs "language" problem. Many UTC. bears ago, this station between 0300 and 0400 of these stations are di- was known as Radio UTC, though the rest of the rected at "home" Sutatenza, part of an edu- schedule is broadcast in audiences in the tropical cational system. Now it is Spanish. 85 www.americanradiohistory.comAmericanRadioHistory.Com PERU-Radio Ancash in that station has quite a bit to Military Monitoring recorded promos in Huaraz is one of the most of English programming. It (Universal Electronics Inc., Brazilian Portuguese. reliable of dozens of Peru- signs on at 0430 UTC. 4555 Groves Road, Suite 13, DOMINICAN REPUBLIC - vian stations, says Rich So there you have Rich Columbus, OH 43232; 4,780 kHz. Onda Musical McVicar. It devotes much of McVicar's suggestions for $19.95 + $4 S&H). has been reported on this its schedule to broadcast- ten easy countries to hear A few words about frequency in Spanish at ing Peruvian huaynos, a on the 60 -meter tropical monitoring the military: The various times between 2200 haunting type of folk music band. Some of you may first word is "legal." What and 0130 UTC. often recognizable by the have other favorite, easy -to- Douglas describes in his COLOMBIA-4,865 kHz. high -pitched singing, ac- hear stations around this 280 -page comprehensive La Voz del Cinaruco is a companied by violins and 4,750-5,060 -kHz SW band. book is purely legal. The Colombian shortwave guitars. Look for this one at Drop me a line with your second word is "intriguing." outlet being heard at about 0100 UTC on 4,991 suggestions. Or maybe you No techno -jargon here. It around 0100 UTC. It was kHz. have some general ques- includes everything a noted with an identification, GUATEMALA-- Sistema tions about SWL'ing? The would -be monitor of the supermarket ads, and a Radial Tuezulutlan in Co- address, as always, is "DX military channels would sports program, all in ban, Guatemala, Listening," Popular Elec- want or need in the way of Spanish. broadcasts in local Indian tronics, 550 -B Bi- County information, including SOUTH AFRICA- -4,810 languages and some Span- Blvd., Farmingdale, NY frequency listings. kHz. South Africa's Radio ish, but the identification, 11735. Douglas notes that there's 2000 is heard with English Radio Tezulutlan is not hard a lot to monitor on the SW and Afrikaans- language to pick out. Sound it out a MILITARY MONITORING frequencies, from strategic programming at about few times until you are fa- Not surprisingly, one of bombers on global missions 0130 UTC. miliar with it -tesu- Loo -tlan. the major users of radio to aircraft carriers at sea. TANZANIA-5,050 kHz. Tune this one at around frequencies is the U.S. U.S. military users of Radio Uganda is heard on 0200 UTC on 4,835 kHz. Military. Many of these shortwave high frequencies this frequency from 0400 CUBA-Radio Rebelde is frequencies are in the VHF are the Naves HICOM UTC, with announcements, a 60 -meter tropical -band (very high frequency) and network, the Air Force news, and station alternative to the more UHF (ultra high frequency) Global net, as well as the identification in English, widely heard international sections of the radio Mystic Star channels that followed by a musical broadcasts of Radio spectrum. Some - are used to communicate program. Habana Cuba. Radio Re- communications with with Air Force One and belde transmits on 5,025 submarines-are on VLF other VIP overseas flights. kHz, in Spanish with some (very low frequencies), But the real grabber, at excellent Cuban rhythms. which penetrates deep into least to me, was the final ANTIQUE RADIO (Continued from page 23) Listen at around 0200 UTC. the oceans. chapter of The GHANA-From the West- But a surprising amount Comprehensive Guide to ern Hemisphere, now we of long- distance military Military Monitoring. It S6, respectively. Preset ca- skip to West Africa and GBC communication can be focuses on the latest facts pacitor C46 (selected by Radio One in Accra, found on the HF (high - and, yes, rumors S7) tunes L7 for automatic Ghana's capital, another frequency) shortwave surrounding covert and so- station selection on the tropical -band signal. bands. Many shortwave called "black" military longwave band. Suffix let- Ghana Broadcasting Corp. listeners -even those who projects, such as the ters on switch sections have puts in a very listenable aren't even aware of what supposed super- secret spy the same meaning as be- signal almost nightly on they are hearing -have plane "Aurora." What did fore. 4,915 kHz, after its 0525 UTC tuned across some of these Douglas conclude about Moving over to the os- sign on. Most programming SSB (single -sideband) these topics as a result of cillator section, note that is in English. signals. his monitoring? You'll have coils L12 (SW), L13 (MW), L14 (LW) NIGERIA-Another West When you begin listening to read it -as I did -to find and are tuned African SW regular is Radio to these transmissions, it can out. Military SW monitoring manually by C48 (which, Nigeria, in the northern open a whole new is addictive. though not indicated on Nigerian city of Kaduna, dimension to the listening the schematic, has to be which uses 50 kilowatts a hobby. It has been a few DOWN THE DIAL ganged with antenna -tun- ing capacitor C47). comfortably powerful sig- years since I have done Here are some other 60- nal -on 4,770 kHz. Again, much monitoring of these meter band stations that Automatic tuning is accom- military shortwave signals, your fellow DX'ers have plished by shunting preset (L8, L9, or L10 Credits: Julianne Bickus, VA; and there have been some been tuning in: inductances Ralph Brandi, NJ; Richard significant changes in that BRAZIL-4,805 kHz. for medium wave; L11 for D'Angelo, PA; William time. So It was with great Radodifusora Amazonas is longwave) across L14. Those Davenport, TN; Jerry Klinck, are selected by additional interest that I read Steve A. noted here at around 1030 NY; North American SW sections of switches S4, S5, Association, 45 Wildflower Douglas' recently published UTC with echo Road, Levittown, PA 19057 The Comprehensive Guide announcements and 56, or S7, respectively. www.americanradiohistory.comAmericanRadioHistory.Com HAM RADIO By Joseph J. Carr, K4IPV Afrequency mixer is a ham -radio and general - an "amplitude modulated" nonlinear device in electronics literature. How- kind of display, with a ca- which Iwo signals are com- ever, there is one class of cophony of frequencies bined to produce new mixer that is particularly floating around. frequencies. Such circuits well- suited to many ham are used in super- needs: the double -bal- MY EXPERIENCES heterodyne receivers, anced mixer (DBM). Various Recently I wanted to Using direct -conversion receivers, articles, based on a build a downconverter that frequency translators and number of specialized or would allow me to use my Double converters, SSB transmitters, discrete components, have Boyd sweep generator and in a host of other de- been published on how to (2 -30 MHz) on low IF Balanced vices where one seeks to build a DBM. frequencies (e.g., 455 kHz) convert one frequency to The mixer that we'll dis- and the VLF bands (e.g., Mixers another. cuss is based on the very 85-340 kHz). I used a 3,58 - popular MiniCircuits SBL -1 MHz color -TV oscillator mixer, which accepts RF crystal and mixed it with the and LO signals over the output of a 3.5- to 5.5 -MHz range 1 to 500 MHz, and voltage -tuned oscillator, produces IF outputs ranging which represented the from DC to 500 MHz. The sweep generator to be SBL -1 is available from added later. The sweep of Ocean State Electronics - the VCO is controlled by a FO. Box 1458, 6 Industrial sawtooth signal from a Fig. 1. Here's a basic Drive, Westerly, RI, 02891: Tel: function generator. The configuration for the SBL -1. 401 -596-3080 (voice); result is an output of 80 kHz When only a resistive load is 800 -866 -6626 only); to 1.92 MHz. connected to the output (orders terminals, the signal appears and 401 -596 -3590 (Fax.) - A DBM is different from as an "amplitude modulated" for less than $10. single -ended mixers kind of display, with a Figure 1 shows a basic because it prevents the cacophony of frequencies application for the SBL -1. local- oscillator and RF -input floating around. The RF signal, which can signals from appearing in have any level up to +1 the output. The only signals The standard mixer takes dBm (1.25 -mV rms), is ap- that appear are the sum two signals, which we'll refer plied to pin 1. The local and difference IF signals to as frequencies f1 and f2, oscillator (LO) signal, which f1 + f2 and fi- f2), assuming and produces an output must be about + 7 dBm (5- that the DBM is properly spectrum of mfg ± nf2, mV rms) for good mixer terminated in its where m and n are integ- action to take place, is ap- characteristic impedance ers. Although the actual plied to pin 8. All other pins (50 ohms). spectrum is quite rich, the are grounded. In my first attempt, a 9- principal components are When only a resistive element low -pass filter (see those that exist when m and load is connected to the Fig. 2) designed for a cut- n are either 0 or 1, so we output terminals of the off frequency of 2 MHz was need only look at the fol- SBL -1, the signal appears as added to the circuit of Fig. lowing components: f1, f2, OUTPUT f1 + f2 and f1 - f2. Put in 0 L5 terms of superheterodyne L1 L2 L3 L4 us ë3.25µH 7.2µH 7.6µH 7.2pH 3.25pH receivers, those are the RF SBL-1 1 (i.e., f1), the local oscillator, or LO, frequency (i.e., f2), the Cl C2 C3 C4 sum intermediate frequen- 2270pF 2700pF 2700pF 2270pF cy or IF (f1 + f2), and the difference IF (f1 -f2). Fig. 2. Adding the 9- element filter to the basic circuit produced There are a number of considerable improvement in the output, but it still contained mixer circuits available in the higher frequency element (f1+ f2). 87 www.americanradiohistory.comAmericanRadioHistory.Com LOW -PASS OUTPUT only for the desired MAR-1 preamplifier that was FILTER o A frequency component, but covered in this column L1 L2 L3 for the unwanted (November 1993 and 4.6µH Ui 7.9µH 4.6µH component as well. March 1994) is ideal as a SERA Figure 3 shows the final postamplifier. (The printed - C3 CI C2 circuit -known as a circuit board and 1388pF 2200pF 2200pF diplexer -which consists of instruction manual for the L4 iwo*filters (low -pass and MAR -1 preamplifier are still 2.9µH C4 high -pass) connected available from me for $10 820pF across the output of the postpaid). HIGH -PASS SBL -1. Both filters were When I finally finished the FILTER a 2 -MHz circuit, and hooked it up to C5 designed for cut- 1388pF off frequency. Because I my Boyd Electronics sweep wanted the difference IF generator, I was able to test R1 the output is taken from and align several low - 51L2 point "A." That point must frequency IF- amplifier be terminated in a 50 -ohm projects that are currently load for both the filter and on my bench, as well as Fig. 3. The final circuit-known as a diplexer -used low -pass the SBL -1 to work effectively. doing more development output of the SBL -1. and high -pass filters connected across the The high -pass filter is of several very -low- Both were designed a 2 -MHz cut -off frequency. filters for terminated in a 51 -ohm frequency (VLF), tuned - dummy -load resistor (R1). radio- frequency (TRF) 1. Adding the 9- element Since the output wasn't as Because little power is used receivers that I am working I on. Those filter to the basic circuit pure as wanted it, I looked in that circuit, a 5 %, 1 -watt receivers are configuration produced a little further in the DBM resistor can be used; if you used by amateur scientists considerable improvement literature, and came across wish, the single unit can be and students doing in the output, but it still several articles that replaced by a pair of 100 - observations on solar contained the higher informed me that "proper ohm resistors connected in disturbances. It seems that frequency element (f1 + f2). termination" is required not parallel. the sudden ionospheric The high -pass filter diverts disturbances that whack any unwanted high - shortwave out of existence frequency components that for hours or days actually From Not -Workin survive the mixer action and enhances VLF reception. absorbs them into the Send me a self - to Networking! dummy load. If those addressed stamped Troubleshooting signals were not absorbed, envelope with Iwo first -class they would be reflected stamps on it if you are Local -Area Networks! back into the mixer by the interested in this subject. I'll low -pass filter. That would send you a bibliography Now, complete for the first cause mixer action to be and a reprint of an article I time in one detailed booklet! less than it should. did in a science -teacher's Gain a fuller knowledge of network The same circuit can be magazine on the topic. fundamentals and how they used for either possible developed from the early days of case. In the example FILTER NOTES main frames, from XNS to Ethernet shown, the difference signal The two filter circuits used technology, the OSI stack for is output. If you want to in Fig. 3 are designed for a interconnecting different computers, output the sum signal, then cut -off frequency of 2 MHz basic and specialized test instruments, etc. Several connect the dummy load when 50 -ohm input and tough LAN case histories bring from theory to the resistor (R1) to point A and output impedances are practical side of troubleshooting. take the output signal from used..That characteristic point B. makes the high -pass CLAGGK Inc., Reprint Bookstore The SBL -1 and filter version quite useful for P.O. Box 4099, Farmingdale, NY 11735 combination has a loss that suppression of AM Please rush my copy of "From Not -Working to Networking." I enclosed can approach -10 dB. Of broadcast -band signals a' payment of $5.00 which includes shipping charges. that figure, about -7 dB of the antenna input of Name the loss is in the DBM itself, receivers. Similarly, the low- Address and the rest is made up in pass version can be used City State ZIP the filters. In order to make for keeping shortwave up for that loss, it is transmitters (such as ham Sorry, no orders excepted outside of United States and Canada. All to use a transmitters) from interfering Payments must be in U.S. funds. Send check or money order payable to common practice CLAGGK Inc. -do not send cash or stamps. New York State residents fixed -gain amplifier after with AM broadcast -band add applicable sales tax. 88 the filter. The MiniCircuits receivers. www.americanradiohistory.comAmericanRadioHistory.Com SCANNER SCENE By Marc Saxon adio Shack's PRO -2030 The radio scans and Corp, and Pinkerton's Secur- fflis a good -looking desk- searches with "Hyperscan" ity. Most companies top scanner. Made for the at 50 channels per second, operate through Business average scannist, it offers or it can be switched to Radio Service repeaters in 80 programmable memory operate at a slower 12 the general range of 461 to Not -So- channels formatted into channels per second. Inter- 465 MHz. Those communi- eight banks of 10 channels mediate frequencies are cations can often be most Private each. There are 10 addi- 10.8 MHz and 450 kHz. interesting, and very similar tional monitor memories for Sensitivity in the VHF aero- to police communications. Security temporary storage of inter- nautics band is 2.0 µV. Of the national compa- esting frequencies Between 29 and 54 MHz, nies, the stations operated discovered during frequen- the sensitivity is 0.5 µV and by Pinkerton's are very ac- cy searches. A front-panel from 137 to 174 MHz, it's 0.7 tive. Inasmuch as public - key provides instant access µV. From 380 to 512 MHz, it's safety frequency guides al- to the NOAA weather band, 1.0 µV and above 806 MHz, most never list private and also a programmable the set is rated at 0.8 µV. security forces, we thought priority channel. You can get a close -up we'd pass along some in- look at the PRO -2030 at any formation on monitoring Radio Shack store. Pinkerton's. The frequencies indicated are believed to ON GUARD be in use in the parts of The private security indus- those states where the try is booming. That growth company operates. has been spurred on by a In Tennessee, 461.16 MHz. combination of rising crime In Indiana, 463.275 MHz. In rates and police depart- New York, 462.075 and ments forced by budgetary 463.525 MHz. In Pennsyl- restraints to operate below vania, 463.525 MHz. In their full deployment Nebraska, 461.125 MHz. In strength. As a result, private Texas, 461.025 MHz. In Ari- guards, watchman, and se- zona, 461.75 and 461.95 curity forces have been MHz. In Ohio, 461.9375, stepped up around facto- 463.415, and 46.275 MHz. In ries, plants, construction Missouri, 463.225 MHz. In sites, and office buildings. Kansas, 463.825 MHz. In Ala- This handsome desktop scanner from Radio Shack, the On duty day and night, bama, 463.825 and 464.95 PRO -2030, allows users to search and scan in quick (50- channel- they might provide on- MHz. In Connecticut, per- second) Hyperscan mode, or at a more leisurely 12 channels premises security at en- 464.175 MHz. In Michigan, per second. trances, in parking lots, and 464.70 MHz. In New Jersey, in other areas. Most are 464.25 MHz. In Virginia, The PRO- 2030's frequency uniformed personnel, and 463.775 MHz. In North Caro- coverage is liberal, consist- many are armed. In almost lina, 463.75 MHz. In ing of 29 to 50 MHz and 137 all instances, the security Washington, DC, 463.925 to 174 MHz (scanned in 5- companies operate their MHz. kHz steps), and 380 to 512 own communications sys- MHz and 806 to 956 MHz tems. IT TAKES TWO (scanned in 12.5 -kHz steps). Hundreds of local security When both stations corn - The two cellular bands are and guard services are municating with one blocked out. The PRO -2030 presently operating, plus another operate on the also covers the VHF aero- several large, nationwide same frequency (as in VHF nautics band, 108 to 137 companies such as Borg aeronautics radio or on the MHz, in 12.5 -kHz increments. Warner Security, Wackenhut CB band), it's known as 89 www.americanradiohistory.comAmericanRadioHistory.Com simplex communications. kidding around. The salty CIRCUIT CIRCUS is language and candid When a repeater being (Continued from page 84) used, each of the two sta- commentary offended pas- tions in communication sengers. What was worse, must use a different fre- the dispatcher had to fight +9v quency. That is called for use of the wonderful duplex operation. Typical "party line" to send the examples include cellular cabs on calls. The answer phones, some two -meter was to exile the taxis to a amateur communications, channel where they could 2 R1 and VHF ship -to -shore tele- hear only the dispatcher 1MEG phone calls. For instance, and not one another. cellular mobile units trans- That seems like as good R3 10K mit in the 824-845-MHz a reason as any for the band, while the cell sites practice to be used so (repeaters) transmit back to widely in this one radio ser- 'SEE TEXT them in the 869- 894 -MHz vice. A truly unique set of band. circumstances called for Fig. 7. The Transistor Matching Circuit, like the diode version, Except in the instances this strange, but effective, simply compares like rated diodes to each other in order to ferret where repeaters are used, solution to a problem. out pairs with identical or near identical electrical VHF and UHF communica- characteristics. tions normally take place in GASBAG simplex mode. Can any From time to time, we reader quickly name the receive letters asking for the PARTS LIST FOR THE TRANSISTOR one shining example of a frequencies used by the MATCHING CIRCUIT (Fig. 7) VHF two -way radio service Goodyear Blimp, which that doesn't use repeaters shows up at ball games RESISTORS but often has base stations and other events. From (All resistors are 1/4-watt, 5% units.) Rl, R6- 1- megohm and mobile units that oper- what I gather, there is more R2, 100,000 -ohm ate on different than one blimp operated R5- R3, R4- 10,000 -ohm frequencies? by The Goodyear Tire and R7, R8 -1000 -ohm If you said the Taxicab Rubber Company, but they Radio Service, you'd have are all similarly equipped. ADDITIONAL PARTS AND MATERIALS been correct. As it turns out, Blimp air /ground, flight, Qi, Q2-NPN transistor under test (see text) S1 switch taxi companies aren't obli- and docking operations -DP3T Perfboard materials, enclosure, 9 -volt power source, DVM, wire, to use duplex. They have been reported on gated solder, hardware, etc. are permitted to use sim- 132.0, 151.625, 464.50, plex in their band, which 464.55, 465.9625, and runs from 152.27 to 152.465 465.9375 MHz. The specific MHz. Optionally, they can frequencies used depend be easily increased (by de- is for matching the collector elect to have the cabs op- on the requirements of lo- creasing the resistor values) saturation voltage. erate duplex by receiving cal broadcast facilities in for power diodes. The circuit's base -current the base station's 152 -MHz the various areas visited by To match diodes using resistors were selected to transmissions but transmit- the blimps. the circuit, place a diode in match most general -pur- ting back to the base the D1 position. Then go pose, low -power transistors. station on frequencies in CORRECTION, PLEASE through your other diodes Darlington and other very the 157.53- 157.725 -MHz A letter from William P one at a time, placing high gain transistors require band. Many decide to go Chapman Jr., of Albion, them in the D2 position higher valued base resistors. this route. Pennsylvania, asked for the while monitoring the meter Looks like our space is Why? The answer came frequency of a prison for the lowest reading. used up for this visit. Good from a cab driver I asked a known as SCI Albion, lo- circuitry until we meet here few years back. He said cated in his home town. TRANSISTOR again next month. that, originally, the cab Although I couldn't unlock a MATCHING CIRCUIT company's base and vehi- frequency for that specific The circuit in Fig. 7 can cles all operated on the facility, correctional institu- be used to match two tran- A GOOD same frequency, but the tions in Pennsylvania usually sistors for current gain and/ boss was always angry. The operate on at least two or collector saturation volt- boss claimed that the driv- common frequencies, 45.16 age. Switch positions 1 and ÑÉIGHBOH ers were continually tying and 453.325 MHz. Try plug- 2 supply a low base current Volunteer. up the channel with foul ging those channels into to the transistors being test- language, griping about your scanner and see what ed so that their current gain 0 American Heart Association 90 small tips, and generally you find. can be matched; position 3 www.americanradiohistory.comAmericanRadioHistory.Com Even if the antenna could be made mance. The vertical is used in con- GROUND ZERO long enough for efficient signal pick- junction with a substantial ground rod (Continued from page 61) up and good directivity, it would be and a 25 -30 -foot radial system. As difficult to take full advantage of the noted, the total length of the antenna, tical accessories for those interested directional characteristic because it's transmission line, and ground lead in LF/VLF communications, 1750 - impractical to reorient the antenna. can't exceed 50 feet. Separate active meter band operation, VLF /ELF natu- Also, the long wire is likely to be se- (gain -type) whip antennas are popu- ral radio phenomena, LF electronic verely affected from the high noise lar for receiving on 1750 meters. countermeasures, and the like. Items levels that prevail in most urban and offered include a transverter kit that suburban locations. Going Further. If you want to learn allows any amateur -radio operator Loops are enjoying a new lease on more about this most interesting part with 80 -meter capability to operate life at the lower frequencies. That is of the radio spectrum, a good one - on 1750 meters; the unit includes both because they can be made phys- stop tutorial on LW is The World Below a receiver up converter and a trans- ically small, they can be resonated or 5001Glohertz, by L. Peter Carron, Jr. The mitter down converter. A high- perfor- tuned to a particular frequency, and 64 -page mini -book, probably the mance 1750 -meter band CW trans- they can be rotated to take advan- only beginner's book on LW, provides ceiver kit (described in the April 1994 tage of their directivity. Most loops an overview of LW and introduces QS1) is also offered. Other products give a figure -eight pattern similar to many of the users of these frequen- include VLF converters and pre- that of a half -wave dipole. cies. It's published by Universal Radio. amplifiers, active -antenna systems, Loops tend to be quieter than sin- We think you'll find LW an interesting longwire and loop receiving anten- gle -wire outdoor antennas, are less complement to the more conven- nas, and various accessories. Many of prone to swamping by strong local tional aspects of higher frequency ra- the Curry Communications products broadcast stations, and can be used dio communications. The microwaves are distributed by LF Engineering Co. to null out noise and interference. may be more exotic, but there's still a Some loops allow for greater noise lot to learn about the pioneering Longwave Antennas. Variations on reduction by enclosing the loop wires bands. Twist your dial far below the single- wires, longwires, end -feds, Mar - in a special, non -magnetic shield. broadcast band and enjoy a form of conis, and combination vertical and That can markedly improve the over- radio communications you may not horizontal L's are common for LW re- all signal -to -noise ratio of the re- have known existed. ception. As a rule, you should get as ceived signal. However, some report much wire as possible in the air, and poor results with indoor loops as a re- ti run it well clear of surrounding objects sult of radiation from household wir- W 11 tsdrunirs Er< and noise -generating sources. ing. More familiar types of antennas are Palomar Engineers offers an excel- --- o used for the upper -LW frequencies. lent preamp/loop, that's adjustable in .n Yy rl. , r.r ihi One antenna that has been popular both azimuth and elevation, for use for many years on both long- and me- with its LW converter, or any LW re- dium -wave frequencies is the wave or ceiver. The amplifier can be used with Beverage antenna. For general LW re- several plug -in loops to extend ception, it consists of a horizontal wire coverage into the shortwave fre- a wavelength or more long, oriented quencies. in the direction from which the desir- So- called active -gain antennas Your Ticket To ed signals arrive. It is usually sus- using a steel -whip or wound -coil ele- pended 10 to 25 feet above the ment and an antenna -mounted pre- ground and supported at intervals to amplifier are also very popular for LW. relieve strain. The simplest Beverage is Some enthusiasts claim they make Over 28,000 technicians have gained admit- a single wire terminated in its charac- the best overall -LW receiving anten- tance worldwide as certified professionals. teristic impedance on the far end. nas. Typically such antenna systems Let your ticket start opening doors for you. There are many types of horizontal are mounted outdoors, away from ISCET offers Journeyman certification in Consumer Electronics, Industrial, Medical, and dual -polarized antennas you noise and distracting objects; the am- Communications, Radar, Computer and can adapt for LW applications, al- plified signal is routed to the LW re- Video. For more information, contact the though very little has been written ceiver through a length of coaxial International Society of Certified Electro- nics Technicians, 2708 West Berry Street. about them in recent years. The ARRL cable whose shielding minimizes Fort Worth, TX 76109; (817) 921 -9101. Antenna Book will give you some noise pickup. Name ideas For and basic principles. In some transmitting on 1750 meters, al- Address ways, LW receiving antennas are most any type of antenna will suffice city much like those you might build for for casual experimentation, out to a State Zip the 160 -meter amateur band or for mile or two. However, most serious op- Send material about ISCET and serious medium -wave broadcast erators use a short, loading -coil reso- becoming certified. DX'ing, band only on a larger scale. nated vertical antenna, sometimes Send one "Study Guide for the There are some disadvantages to topped with a large "capacitance Associate Level CET Test." En- random -length single -wire antennas. top hat," for best transmitter perfor- L closed is $10 (inc. postage). J91 www.americanradiohistory.comAmericanRadioHistory.Com HOME SECURITY SYSTEM (Continued from page 40) From the Lab Indicating that the system will be fully to your armed once the selected exit -delay time expires. Living Room! After the delay timer expires, a chirp should be heard on the external siren and the SYSTEM ARMED and the keypad ARM LED's should flash, indicating that the system is fully armed. Test each zone -bypass switch by turning It on and verifying that opening its corre- sponding zone door or window does Does your VCR haue a "head Cold?" not trip the alarm. If the alarm does trip, disconnect power and check the Probably not! However, through constant playing and using of degrading dry solder connections of the corre- or wet cleaners, the output of your video tapes has slowly diminished to an sponding DIP -switch position. Also unacceptable level and the VCR plays as if it has a head cold! The culprit is look for solder bridges along the most likely clogged and dirty video and /or audio heads. traces running to pins 31 through 38 of The 3M Black WatchTM Head Cleaner Videocassette uses a patented mag- the Z8. netic tape -based cleaning formation to remove head clogging debris. No for- After verifying the zone -bypass eign substances such as cloth, plastics or messy liquids and no harsh abra- switches, re- enable all zones and sive materials are present. The cleaner's usable life is 400 cleanings or more! check the non -delayed zone inputs It's easy to use. Place the 3M Black WatchTM Head Cleaner Videocassette (zones 2 through 8) to see that each in the VCR and press the Play button. A pre- recorded message appears clear- trips the alarm when opened. After ly on your screen and an audible tone is heard, telling you that the cleaning opening a zone door or window, go to process is now completed. No guess work, you never over clean! the zone -status panel and verify that 3M Black WatchTM Head Cleaner Videocassette S® IVIlS $19.95 the corresponding zone LED is flash- ing. Reset the sirens by pressing the RESET switch on the main -control unit Once your VCR's head cold is cured, and the unit plays like new, consider and repeat the test with the remain- using the finest videocassette you can buy -the 3M Black WatchTM T120 Hi ing non zones. Pro VHS 4410 Videocassette. The 4410 is the highest performing video- -delayed cassette available today for use with all standard format VHS recording hard- Once all the non -delayed zones ware! have been tested, test the delayed - input by opening the cor- Here's what you hear and see....A sharp, clear picture- brightest colors - entry zone freedom from streaks, flashes and snow-outstanding high -fidelity audio re- responding protected door while the production- optimum camcorder performance -maintains recording integri- system is armed. The keypad warning ty. 3M Black WatchTM video tape is 100% laser inspected to guarantee surface buzzer should sound and the lights in smoothness and drop -out free performance. the entry-zone should turn on (assum- 3M Black WatchTM T120 Hi Pro VHS 4410 Videocassette MEI $8.00 ing an X -10 computer interface is set up properly and connected). If the r system is not disarmed before the en- try -delay timer expires, the alarm CLAGGK INC. 3M VHS Special Offer - should trip and both sirens should P.O. Box 4099, Farmingdale, New York 11735 sound. Whenever that alarm sounds Yes, I like your offer and here is my order for 3M Black WatchTM products! and the system is not disarmed, the Black WatchTM Head Cleaner Videocassette ($19.95 each) $ 3M main -control unit will automatical'y Hi Pro VHS 4410 Videocassette ($8.00 each) $ 3M Black WatchTM T120 reset the system in five minutes. You Shipping and handling per order $ 4.00 can verify that by timing the reset Total Amount in U.S. Funds only period with a stopwatch. New York State residents add local sales tax. Canadians add $6.00 per order. No for- Finally, test the backup- battery op- eign orders. Do not send cash. eration of the main -control unit by dis- AC power and verifying Bill my VISA MasterCard Expire Date _/_ /_ connecting that the BATTERY LED on the zone -status Card No. panel lights. Following the comple- Signature tion of the system -testing procedures, Name (Please print) be sure to reconnect the auto- dialer and reinstall any fuses that were re- Address moved from the main- control unit ZIP City State during testing. 92 J www.americanradiohistory.comAmericanRadioHistory.Com the 1T4 were tried and found not to ONE -TUBE RADIO PARTS LIST FOR THE ONE - (Continued from page 62) TUBE RADIO have enough gain. All of the recommended tubes RESISTORS were very popular and should be The circuit is powered by bat - (All fixed resistors are 1/2 -watt, 10% easy to find for many years to come. teries-a 6 -volt lattern battery for B1, units.) The headphone jack, variable ca- and ten 9 -volt batteries for B2 -to R1- 22,000 -ohm pacitor, volume control, and "A" bat- avoid power -supply hum. Battery op- R2- 100 -ohm tery are held in place by small angle 22,000 -ohm eration is also safer for experimenters R3- brackets found in hardware stores. R4- 100,000 -ohm potentiometer who are used to low- voltage solid - Fahnstock clips are used as tie -points state equipment. If you want, you can CAPACITORS so very little soldering is required. use a 6.3 -volt transformer to power Cl, C4 0.01 -µF, 400 -WVDC, electrolytic the tube filament. Better yet, build a Using the Radio. I use a 30 -foot DC supply. A 5 -volt power supply that C2, C3 -1 -11F, 400 -WVDC, piece of wire across the ceiling of my electrolytic will deliver 300 -mA should work fine, basement as an antenna, but an out- C5- 365 -pF variable and with only slightly reduced gain. door wire as high, long, and in the C6- 100 -pF, 400-WVDC, The tube only draws about 4 -mA from electrolytic clear as possible may be needed if the 82 supply, so those batteries will you want to pull in distant stations. Ifs last a long time. Any well -filtered ADDITIONAL PARTS AND worth some time and effort to con- MATERIALS source of 70 to 250 -volts DC can be nect a good earth ground to the ra- VI-6SH7, 6SG7, 6SK7, or 6SS7, used though. really metal or glass vacum tube (see dio-it makes a difference. text) Close the power switch and allow a Construction. Construction of the Dl -1N34 small -signal germanium minute or so for the tube to warm up. radio is almost self- evident from the diode With the volume control at maximum, photo at the beginning of this article. BI-6 -volt lantern battery tune the variable capacitor to the sta- The baseboard is a piece of 21 -inch B2-Ten, 9 -volt batteries connected tion you want. It's not really necessary, long, 8 x 1 -inch pine. A couple of 1 by in series. but you can center the bandpass ex- 4's underneath it help prevent split- Ll-See text actly on the station by temporarily Sl knife switch ting. A front panel can be added if -DPDT connecting a moving -needle type Tl- Tube -type high- fidelity output you want. voltmeter in place of the transformer transformer (see text) The ten 9 -volt batteries, are held in primary Baseboard, angle brackets, socket for and tweaking the variable 1 x place by a couple of 2 -inch tube (see text), Fahnstock clips, capacitor for maximum output. boards. The tube is mounted in an screws, solder, wire, etc. I've had a lot of fun with this little octal relay socket. I added fahnstock radio and I'm sure you will too. It really Note: All parts, or usable clips under the connecting screws. does sound great! equivalents, are available from: Octal relay sockets from Amphenol Antique Electronic Supply, 6221 S. (146 -103), Custom Connector (0T08- Maple Ave., Tempe, AZ 85283. PC), and Potter & Brumfield (27E122) are suitable. Of course, a conven- TANDY tional tube socket mounted on connecting them in series will present NATIONAL PARTS spacers could also be used. a total impedance of 16 ohms. So use WE HAVE THE PARTS FOR YOUR The coil is wound from No. 22 the 16 -ohm output connection of the ELECTRONIC PROJECTS!! enameled wire on a piece of plastic transformer and connect the full pri- PROGRAMMABLE pipe 2- inches in diameter. The length mary winding between the movable TIMERS BELTS of the winding is also 2 inches. contact of the volume control and ICS FUSES BUZZERS CRYSTALS The audio -output transformer is on ground for a start. After the radio is one end of the baseboard. Almost checked out, try different combina- CAPACITORS TRANSISTORS any tube -type transformer can be tions to see what gives the best output EPROMS i PULLS used as long as it's primary imped- and fidelity. AT REASONABLE PRICES ance is at least 1000 ohms (the higher A number of different tubes may be CALL FOR & the better), and the secondary is in used without any changes in the cir- PRICE AVAILABILITY the 4 to 16 -ohm range. The better the cuit. Among them are the 6SH7, the NO MINIMUMS quality of the transformer (which usu- 6SG7, the 6SK7, and the 6SS7, and ORDER TOLL FREE ally means bigger and heavier) the their " -GT" (glass -tube) equivalents. better the frequency response. The The first Iwo listed give the greatest 1- 800 - 322 -3690 ASK FOR unused leads of the transformer are output in the circuit, but all will work OPERATOR # 732 taped and tucked away underneath. and are reasonably priced -usually The two earpieces of the stereo under $4. "CATALOG KNOCKS SOCKS OFF" headphones are connected in series If you want to use 7 -pin miniature For our free Catalog, just send your and no connection is made to the tubes, the 6BA6, or its 12 -volt filament name and address to: "ground" terminal of the plug. If 8- cousin -the 12BA6 -are excellent ohm stereo headphones are used, choices. "Battery- type" tubes, such as Consumer Information Center Department KO 93 Pueblo, Colorado 81009 www.americanradiohistory.comAmericanRadioHistory.Com VFO'S Figure 10 shows an NE602AN Colpit- CAR SECURITY SYSTEM ts- oscillator circuit. Three (Continued from page 44) capacitors (Continued from page 54) (C1 -C3) are used in this circuit rather than two because of a need for DC vehicle and control the horn or lights. nal is taken from the source terminal blocking. These capacitors should be Bear in mind that both K1 and K2 re- through a 10 -pF capacitor (C7). The equal to each other, and have a val- main deactivated when power is first signal is fed to gate 1 of the 40673 ue on the order of 2400 /fMHz applied to the receiver. They remain dual -gate MOSFET, which is used as an picofarads. The inductor should have in that until activated by the output- buffer /amplifier stage. That an approximate value of 7 /fMHZ milli - condition transmitter signal. section produces a 44 -dB gain, and is heneries. The tuning capacitor, C4, responsible for making the signal volt- should have a value that will resonate As shown in Fig. 11A, the normally- closed contacts of K1 are connected age so large. The output transformer with the selected inductor as follows: in series with the + 12 -volt power (T1) consists of an Amidon Associates C4 = 1 /(L1(2nt)2)) source feeding the ignition module. FT -50 -43 core wound with 20 turns of Thus, K1 is the vehicle No. 28 enameled wire for the primary, For example, a 5000 -kHz (5 -MHz) os- when activated, is disabled. The normally -open con- and 6 turns of the same wire for the cillator should have network capaci- secondary. tors of: tacts of K2 can be connected to the existing horn -relay coil (as shown in The circuit's output signal is huge as 2400/5 = 480 pF Fig. 11B) to operate the horn. Alter- RF oscillators go, so it may have to be natively, K2's contacts can be wired to attenuated in some cases. That job or the standard value of 470 pE The in can be done by connecting an at- inductor should be 1.4 mH (17 turns on any of the vehicle's lights (as shown Fig. 11C). Both the latter two circuits tenuator resistor pad in series with the an Amidon T-50 -2 red core). To reso- of output signal, or by reducing the DC- nate with the 1.4 -mH inductor requires can be implemented, if desired, by using a double -pole, double -throw bias voltage on MOSFET-gate 2. That a total of 723 pF The series network fuse an job can be done by reducing the val- formed by C2 and C3 already pro- relay. Be sure to use a (with appropriate current rating) to protect ue of R4 until the desired output signal vide 236 pF (470/2). Thus, the variable (C4) be: the vehicle wiring. is achieved (do not reduce it below capacitor should If the single -channel option has about 1k). 723 236 = 487 pF - the relay will be A version of the circuit using the been implemented, An is when S1 is depressed and NTE618 440 -pF varactor diode was NE602AN Hartley oscillator energized is S1 is released. built without the mica trimmer capac- shown in Fig. 11. The circuit identified will de- energize when by the tapped coil in the LC network. For that reason, the single -channel itor (C2). It produced the frequency- The value of the inductor is about 10 option should not be used to disable versus- voltage (VT) characteristic mH /fMHZ, and is from one - the vehicle. It could be used, however, shown in Fig. 8 The varactor is com- tapped fourth to one -third the way from the if it is to operate only the vehicle horn fortable over a range of 0 to 12 volts, needs to lights a basis. although my DC power supply only ground end. The capacitor or on momentary resonate at the desired frequency. For goes down to 1.26 volts, which is why the plot appears incomplete. our 5 -MHz example, an inductor of 2 Final Checkout and Operation. mH is used, which means 20 turns of Final checkout can be performed a T-50 (red) the system is in- Clapp VFO Circuit. The circuit in Fig. wire on -2 core. once completely NE602AN stalled. The first test can be done by 9 can be identified as a Clapp os- A voltage -tuned Clapp oscillator is shown in Fig. 12. The circuit turning the receiver on and walking cillator by its series tuned LC network. uses a varactor diode to set the oper- away from the vehicle. At some dis- The circuit can be used from 0.5 to 7 ating frequency. With the 100 -pF ca- (say 100 feet) stretch out MHz, and even higher if C4 and C5 tance about let it hang ver- are reduced to about 100 pF pacitors shown, the circuit oscillates the antenna wire and from about 6 MHz to about 15 MHz, tically. Set S3 to the ON position and The output of the circuit is taken using an NTE614 (33 -pF) diode. press S1. The horn or lights should op- from the source terminal of the JFET. The oscillator circuits in this article erate. Set S3 to the OFF position and The output circuit includes an RF can be used in any variable- frequen- press S1. The horn or lights should be choke (L2) that builds the output am- cy oscillator (VFO) application in the deactivated. plitude. Bias voltage for the JFET is pro- HF Try The will require the help vided by source -to -drain current VLF through middle regions. disable test 'em, you'll like 'em. of an assistant. Have him or her drive flowing through R2. the vehicle away while you hold the transmitter. Be sure the receiver is NE602 VFO Circuits. The Signetics turned on. When the vehicle is ap- NE602AN is a double -balanced mod- proximately 100 to 200 feet away, set ulator (DBM) and oscillator. Normally, it S2 to the DISABLE position and press S1. is used as the RF front -end of radio The vehicle should roll to a stop. To receivers, but if the DBM is unbal- reactivate the ignition system set S2 to anced by placing a 10k resistor be- the NoRMAL position and press S1. That tween the RF input (pin 1) and ground, should allow the vehicle to be re- it will function as an oscillator that pro- "/ hate going out there in this heat." started. 94 duces about a 500-mV output signal. www.americanradiohistory.comAmericanRadioHistory.Com Supplement to Popular Electronics FQptth1 EJjctrt»ics ahrOctober 1994 I ST2:1 Your Source for Electronic 13UT1 IJG Tools and Technical Aids 4CScc12338 Martin Alexander Rd., Sardinia Ohio 45171 Computer Care Kit System Power Center PC Pocket Reference Deluxe 22 Piece Tool Kit Deluxe Punch Down Tool Universal Modular 51/4" disk 400648400 $14.70 601878805 $28.50 #12148430 $14.90 406248325 533.801.ao el 404647595 $36.80 Crimp Tool (160vel Proud your system born damaging Handy relemrce book ter the Zippered carrying case nNMs pressure (59vata (441u a 005446515 $79.80 3 1)2 disk 400648395 $14.70 & Pire computer technúen_Cods Mews. eon. sloe mnrrenenI Weer surges epees. poem, dePoml arpe, weaving CU-Sbp{wery- and n ore' ncWes mini vacuum el 3 attachments. sumerc banslaun. Mw a canoed ecrewcirwerstnuldrhers, Preens & more chump disk, lead champ fluid, aeew never mech. tandards. uey0oa,d On codes, Economical Punch Down Tool Nantes! 06105 I4 no) .Fu 16,1 E 15 lot colte, AMP plait beater. port pnouls and mush motel Cal more deuce (4 8 6 pm). DEC/14G onset [6 orti Y case 604648255 nibs dip 121w) e 13-IDI. 2.01) Economy 11 Piece Tool Kit $9.75 b 10 ß4S IB Pnl stn Reversable Blades 7450 05947245 $10.90 Grahame nand (4045 Simcheck Memory Tester Modular Flat Telephone Wire $9.65 Tough suasi cm sí,05150 09747205 $895.00 1-0911 100-499 500. hem rte. Stare pude ter 66, 1 I0I89. Basic Crimp Tools Idanhnes bad mertuwy cnos a ono. oes .07e .060 002744400 execute, 1515 605446495 $12.50 Eat, s use Tess.0 SIMM B SIP 6 pore. .095 .060 .07e 802744105 memo, ZS6eM9. a cons 135 .12e .107 .02744425 M.13 le 8h9.1 116Med.9 9 10 and. .208 .161 .161 1102747995 Toll Free LCD deploy. AC adaptor. 10% OFF Order Telephone s csaswiu Cable For New Customers And morel?! Offer expires 7/31/94 1- 800 -57S -2726 30 Day Money Back Guarantee! _ 24 HR FAX 513- 446 -2609 CIRCLE 51 ON FREE INFORMATION CARD MACHINE YOUR DREAM! THIS IS THE MACHINE YOU'VE BEEN WAITING FOR! Have you ever dreamed of manufacturing and marketing your own products? If so, the Neuractor CNC-4 Desktop Manufacturing System may be just the edge you need! This fourth -generation CNC machining center can automatically drill, mill and route three - dimensional products in wood, plastic and light metals DIRECTLY FROM YOUR CAD DRAWINGS! You've seen the rapid -prototyping and "Santa Claus" machines that cost thousands of dollars, but did you know that as an electronic technician you can build one yourself from this inexpensive kit? Utilizing patent pending technology the Neuractor CNC - 4 kit provides you with everything you need to machine products in three dimensions with a resolution of .001". All mechanical components are pre-fabricated, pre -machined, plated and painted. Includes four 83 oz/in CY- MOTORs, interface card, 5 amp power supply, 10 pitch steel lead screws, 4 proprietary Slide Block actuactor mechanisms, 4 aluminum linear actuator channels, polished steel guide -rods, Dremel bracket, hardware, etc.. (You provide Dremel or flex -shaft router and work surface.) Its a complete kit! All you do is put it together and calibrate it! Using 32 screw -type micro-calibrators, you calibrate your machine and then TURN IT LOOSE! Designed to be used with a Dremel MotoTool(tm), or flex -shaft router for more cutting power, the Neuractor translates your 3D CAD files directly into actual working parts! IF THAI'S NOT EXCITING ENOUGH, WE'RE THROWING IN A FREE, FULL -FEATURED 3D CAD/CAM SOFTWARE PACKAGE WITH EACH UNIT! Imagine using your :VS::'., new Neuractor to experiment with different product designs and concepts BEFORE taking the business plunge! By working out your product's 4 -cf- phase of your projects! Built-in fonts for f #a 7 design and Desktop Manufacturing processes, you can virtually automate the "proof concept" k It ' 4,ir,1 rs`Z1 custom sign- making and panel engraving, 187c185c4.6 cutter travel for crafts, electronics, and printed circuit board drilling, , not to mention model- making, -making,and painting. These are but a few opportunity areas others are already exploring is I Ill d, d, it Don't miss out on your chance ri. l.141 ' ..I±tt77A with their Neureclors. You build you calibrate you customize fo' your applications! kip your Neuractor CNC -4 today! ACT NOW! Kt I -in your at -home business! Get started by ordering own $595 '' Kt lI J to cash on own a II' 95 . -' +$24.95 UPS S/H. Allow 4 -8 wks for delivery U. S CYBERLAB, 14786 Slate Gap Rd., West Fork, AR 72774 (501) 839 -8293 www.americanradiohistory.comAmericanRadioHistory.Com OGet instant tech information FREE from your Fax or Computer! MINIMM You can obtain specs, freq. info, software and more .91 from our automated services. For fax facts, call from your stand C =1111111M C alone fax machine and follow the voice prompts. Use the BBS from your modem of fax/modem equipped computer. Dial 317 -849 -8683 for fax back service, or dial 317 -579-2045 for our computer bulletin board service. Continuous Coverage Shortwave Radios COMMUNICATIONS Sangean ATS -818CS $219.95 Sangean ATS -818 $184.95 Total Coverage Radios Sangean ATS -803A $169.95 Sangean ATS -808 $179.95 TRIDENT Sangean ATS-606 $149.95 TR1200XLT Sangean ATS-606P $169.95 AM Broadcast to Sangean ATS-800 $89.95 Microwave 1000 Scan Three new Bearcat units offer Grundig YB400 $219.00 Channels $389.00 expanded coverage and more memory Grundig Satelit 700 $399.00 than before. The 890 offers 200 500KHz to 1300MHz coverage in a channels, base /mobile operation, VFO programmable hand held. Ten scan tuning, service search, weather alert, banks, ten search banks. Lockout on search and store, and more. The 2500 search and scan. AM plus narrow hand held has 400 channels, fast scan and broadcast FM. Priority, hold, and more. The Bearcat 8500 has 500 delay and selectable search increments. Cell channels in 20 banks, VFO, auto Lock. Permanent memory. 4 AA ni -cads and store, alpha numeric display, 10 Hand Held Scanners wall plus cig charger included along with belt priority channels, aux tape output clip, case, ant. & earphone. Size: 6 7/8 x 1 3/4 x jacks, and coverage to 1.3 Gigahertz. Bearcat 200XLTN 2 1/2. Wt 12 oz. Fax fact document # 205 $209.95 200 Channels 800 MHz TRIDEW T Bearcat 2500XLTA hand held $349.95 Ten scan banks plus search. Covers29- TR4500 Bearcat 8500XLTC mobile 3389.95 54, 118 -174, 406-512 and 806 - $449 Bearcat 890XLTB mobile 3259.95 956MHz (with cell lock). 2016 Channels 25- 1300MHz, 500 ch. in 8500, 400 in 2500. 890 has 200 ch.& Featuresscan, search, delay, 10 1 to 1300MHz 29-956MHz. All cell locked. Features include Hubo san, VFO, search priorities, mem backup, lockout, Canputer Contact and store, Priority, LCD display, and more. Fax Fast 474,475,476 WX search, keylock. Includes NiCad 62 Scan Banks, 16 & Chrgr. Size: 1 3/8 x 2 11/16 x 7 1/2. Search Banks, 35 Channels Mobile Scanners Bearcat 120XLTJ 100Ch H/L/U $149.95 per second. Patented Computer control for Bearcat 150XLT 100Ch H/L/U /8 $199.95 logging and spectrum display. AM, NFM, TRIDENT Bearcat 220XLTJ 200 Ch H/L/U/8 $249.95 WFM, & BFO for CW /SSB. Priority bank, TR2C Coverage of above hand helds is. 29 -54, 136-174, 406 -512, and delay/hold and selectable search. Cell Lock Police & CB 800MHz band as indicated. Fax facts 6475 Permanent memory. DC or AC with adaptors. $69.95 Mtng Britt & Antenna included. Size: 2 1 /4H x 5 Scans police pre- Table Top Scanners 5/8W x 6 1 Fax /2D. Wt. llb. fact #305 programmed by state channel plus the CB - channel of your choice. has Bearcat 855XLTE 50 Ch w/800 T Also Mobile S159.95 TRIDEW Repeater and Weather. Extra cost option of CB Bearcat 142XLM 10Ch H/L/U S 73.95 TR980 $279.00 and laser detectors built in. Compact size allows Bearcat 147XLJ 16 Ch H/L/U S 89.95 125 Channels for dash or visor mounting. Mtng hardware and Bearcat 172XM 20Ch H/L/U/Air $124.95 6MHz to power connectors included. Size: 5 5/8 x 4 7/8 x Bearcat 145 16Ch H/L/U $ 79.95 999MHz 1 3/4. Wt: 1.5Ibs. Fax fact #580 Most Economical receiver in Bearcat 700AX 50Ch w/800 $159.95 I Accessories & Etc. its class, offers AM, NFM Wide FM, Bearcat 350A 50 Ch H/L/U $119.95 Mag Mount Mobile Ant MA100 S modes. 5KHz increments. Delay & Bearcat 560XLJ 16 Ch H/L/U $ 89.95 19.95 Base Ant. 25- 1000MHz AS300 hold & Search. Cell Lock NiCads, chger & whip Bearcat 760XM100Ch H/L/U /Air /800 $219.95 $ 59.95 Pre -Amp .1- 1500MHz GW2 ant. Size: 5 7/8H x 1 1 /2W x 2 D.Wt 14oz. Bearcat T2 state /state scan $144.95 $ 89.00 Wide Coverage Antenna $ 119.95 Base Discone Ant DA300 $ 89.00 Winner of the 1994 TRIDENT INNOVATIONS External Speaker MS190 /opt. amp $ 19.95 Design & Engineering Honors, Electronic Industries Old Scanner Repair, all brands S CALL Extended ;c ,pr.,,T,r,ö s Association. Trident TR2400 Total Coverage Receiver Warranties $ CALL Frequency Into FaxFact/Modem $ FREE Trident TR2400: 100KHz to 2060MHz. Ten scan banks of 100 channels each, ten search On Glass Mobile Antenna $ 32.95 banks. Tuning increments as low as 1KHz. Beat Freq. Oscillator for SSB and CW modes. Search lockout and store. VFO tuning knob. Permanent memory. Bank lock and 2 Way Radios linking. Attenuator switch. Backlit LCD. 1 Yr Warranty. AM/NFM/WFM. Selectable $ Vielii-6Iid-pri;giamtnable mobiles as as increments . Delay, Hold, Priority. 5 7/8H x 1 l /2D x 2W. Wt 14 oz. $499.00 low $299.95. Call for quotes or Fax Fact #775 5 Toll Free, 24 Hours! 800 -445 -7717 Fax Orders 800 -448 -1084 Fax Facts 317-849 -86831 LT, i ® Computer BBS Modem & Fax/Modem, 317-579 -2045. Toll Free Tech Support, Dial 800 -874 -3468 La I International Fax: en Espanol, en Francais, und auf Deutsch, or just fax in plain English to: 317 -849 -8794 MasterCard ACE Communications 6975 Hillsdale Court, Indianapolis, IN 46250 Service & Support hours: Mon. -Fri. 9AM to 6PM, Sat. 10-4 EST. Mastercard, Visa, Checks, Approved P.O.'s & COD (add $5.50) & AMEX, Discover. Prices, specifications and availability subject to change. Flat rate ground shipping and handling charge only $6.95 per unit. Express Air only $9.95 , for most units, to most locations. One week trial, no returns accepted two weeks after original 961 receipt without substantial restocking charge. All units carry full factory warranty. Indiana residents add 5 per cent sales tax. FLY /T.! ONLY $9.95 L a CIRCLE 25 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com Simply A Superior 1.3 GHz Spectrum Analyzer 1 -1300 MHz In One S $1,895. MADE IN USA -10KHz Resolution Band Width -7 Digit Center Frequency Display MARINE, TWO -WAY, HAM, AM FM SW BROADCAST RADIO - CATV, SATELLITE. SYS., SURVEILLANCE TUNE DUPLEXERS, AMPS, FILTERS, SECURITY TRANS, & RECEIVERS - EMI, RFI, FCC, TESTING EXCLUSIVE DISPERSION ZOOM ULTIMATE Low cosy ANALYZER INTRODUCTORY OFFER ITC SA Series exclusive Dispersion ITC Spectrum Analyzers are the best Zoom lets you zoom in on any Center performance to price ratio Analyzers on SA1300A & OPT.s 1, 3, 6 the market today. No other low cost Frequency signal, from any one of ONLY $1895.00 note 1 five calibrated Dispersion positions. Analyzer comes close to the Superior 1, 3, 6 Preset at >140 MHz, 50MHz, 10MHz performance and quality of an ITC SA1800B & OPT.s 1MHz and zero MHz per division. The Analyzer. Total flexibility and ease ONLY $2295.00 note I SA1300A displays greator then 1300 of operation. SA1300A gives you full $1995.00 Opt. 1, 6 ONLY MHz on the screen at one time yet control over the Resolution Band Width SA1300A 51595.00 allows instant zoom to any Dispersion and Freq. Span widths. Plus Vertical SA1800B $1895.00 1 $200.00 Scan Width as low as zero MHz per div. OPT. 50MHz MARKER Position, Baseline Clipper, Sweep OPT. 3 +/_ 5KHz Res B.W S350.00 Allowing for total control over all Speed, Video Filter, 4 Input Attenuator OPT. 5 1000 MHz Tracking Generator S250.00 Dispersion Scan Widths settings. settings, 10 Frequency Select settings. OPT. 6 7 Digit Center Frequency Display $300.00 Note 1: Introductory Price for limited time only. 80 dB ON SCREEN MHz MODEL SA1800B 1800 TAKE ADVANTAGE 130 dB total Dynamic range 110 dBm Covers 1 -1300 MHz and 850 -1850 MHz Sensitivity. At Narrow and Wide Band in one sweep. Ideal for Satellite service. CALL 1- 800 -566 -1818 you would has the same general Width settings. Performance The SA1800B To: Order - For Information & Special Intro. Offer expect only from a $10,000 Analyzer. specifications as the model SA1300A. Terms MC, VISA, AE, Check, COD, PO (OAC), LC, Transfer DISTRIBUTED BY: AI)`TA11TrIAG i INSTRUMENTS CORP. 3817 S. CARSON ST. # 818 CARSON CITY NV. 89701 1-800- 566-1818 702 -885 -0234 FAX 702 -885 -7600 97 PRICES & SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE OR OBLIGATION. F.O.B. CARSON CITY NV. NV. RESIDENTS ADD SALES TAX. CIRCLE 138 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com P. 0. Box 280298 Dalla:, Tom 75228 Orders Only 1-800- 276-2206 G. MICRO Tech Support 214 -271 -9834 vrs+ r.11i r-6. Fax 214-271 -2462 L LCD DISPLAYS V RA OPTREX 2x18 -DMC 182011-8 Bit ASCII Input. Dim. 3 1/8 x 1 3/4 x 3/8 THE ULTIMATE PERSONAL Char Height.19" $5.99 OPTREX 2x20 -DMC 20261-8 Bit ASCII Input Dim. 4 9/16 x 1 7/8 x 3/8 UV ERASER The DII has a 2 -8 minute internal Char. Height .19" $7.99 timer with time out beeper. Six month unconditional guarantee. OPTREX 1 x 16 "Backlit"- DMC16187- 8 Bit ASCII Input Dim. 3 1/8 x 1 3/8 x Complete documentation. 9/16 Char. Height .11" $9.95 OPTREX 1 x 20-DMC 20171 -8 Bit ASCII Input Dim. 7 3/16 x 1 5 /16 x 1/2 Char. Height .47' $9.95 OPTREX 2 x 40 -DMC 40218 -8 Bit ASCII Input Dim. 7 3/16 x 1 5/16 x 1 3/32 Char. Height .19" $9.95 v ir VERY EASY TO INTERFACE TO ALMOST ANY MICROPROCESSOR! $49.95 MFM CARD Molded Plastic Case Shirt Pocket Size Auto Start Regulated lamp output for uniform MFM Hard Drive Controller erase time Erases most EPROM's/EPLD's in 3 16 Bit Western Digital Hard Drive/ minutes Handles all sizes to fcur at a time Floppy Controller $17.95 EXPERIMENTERS KEY EPROM SPECIAL For Microprocessor Application We bought a large quantity of 2708s, These controllers are getting very scarce. 2716s, 2532s, 2732s, 2764s, 27128s, 0-9, a -f, 4 Function Keys 27256s, and 27512s from a Operating life -over computer manufacturer who DC /AC POWER CONVERTER 5 million times redesigned their boards. We removed Operating Temperature them from their sockets, erased and verified them, and now Plug in AC from a DC source. 20 deg. to + 75 deg. C we offer the savings to you Input 12VDC (13.8v) Output Contact resistance Complete satisfaction guaranteed 110AC Continuous Power less than 30 Ohms Your Choice 240 watts 60 HZ + Contact bounce 2708 1/20 10/8.00 less than 5 ms 2716 1.75 10/15.00 1% modified sine waves 1 u 2532 2.00 10/17.50 90% efficiency l'll\\ t.H 2732 2.00 10/17.50 1\\t.H Il.k $4.95 1 1/2' x 5 1/2' x 3 1/2' 2764 2.00 10/17.50 Plugs into cigarette lighter 27128 2.50 10/20.00 DTMF 27256 3.00 10/25.00 $79.95 SSI -202 Decoder 2.25 27152 4.75 10/40.00 1 Meg 8.50 10/77.50 + Shipping 8870 Decoder 2.25 5087 Generator 2.00 8741 7.00 5089 Generator 1.25 8742 7.00 LASER PEN POINTER M957 Receiver 2.25 8748 7.00 Data 500 each 8749 7.00 87511-1 12.95 Looks like a clip -on fountain pen COOL IT DUDE! 8755 7.00 Wave length 660 -680 nanometers Finned Heat Sink with Fan EEPROM Fits on CPU Max output 3 milliwatt $79.00 2816 2.20 2864 3.45 $11.45 28256 9.90 8000/80000 BATTERY BACKUP BATTERY BACKUP 8001 5.20 8237 1.90 8088-2 3.25 8257 1.50 FOR COMPUTERS 8002 2.50 8237 -5 2.80 8155 2.25 8259 A 1.85 Nicad Small Size 8010 4.95 8243 1.75 8158 2.25 8259C-5 2.10 4.5V Alkaline sub. for Leads solderable 8031 2.95 8250 2.95 8202A 8.00 8275 10.95 Rayovac 8032 3.95 (18450) 8.50 8212 1.25 8279 2.25 3.6v. #840&844 8035 1.00 (18550) 10.95 8214 2.00 8284 1.48 8036 4.95 8251 1.10 8218 1.25 8286 3.50 $6.95 $5.95 8039 1.00 8253 -5 1.75 8224 1.25 8287 2.48 8085 1.55 8254 1.80 8228 1.75 8288 3.50 CHINON CAMERA CX -103/3 8086 1.55 8255 1.50 8530 3.00 3mm Lens 8088 2.20 8255 -5 1.75 Power Requirements - 9VDC (7VDC - 16 VDC) Power Consumption - 1W (80MA) GAAIAS Plastic Infra -Red Emitter Diodes 46MM (w) x 44 MM (h) x 25 MM (d) Works excellent in the infrared range OP290C - 150 MA Max. ER (APT) 26 MW /CM2 100 MA T 1 3/4 Makes Great Spy Camera, Very Small. ER (APT) 300 MW /CM2 1.5 A pulsed; wide beam 3/$1.00 OP295C - 150 MA Max. E (APT) 77 MW /CM2 1.5 A pulsed Very low light 2 lux (F 1.8) $149.00 T13/4 narrow beam. ER (APT) 6.6 MW /CM2 100 MA 3/$1.00 I I HMS (Unless specified elsewhere) Add $3.25 postage, we pay balance on Orders tinder 5Ibs. Orders eve! $50 00 add 85 for Insurance. No C. 0.11 Texas lie.. add 81/496 lax. 90 Uay Money Back Guarantee all items. All items subject to prior sale. Prices subject lo strange without notice Foreign order 115 rinds only We cannot ship to Mexico or Puerto Rico. Canada, add $/ 50 minimum shipping and handling. Countries other than Canada, add $1 5.00 minimum hipping and handling. CIRCLE 39 ON FREE INFORMATION CARD, www.americanradiohistory.comAmericanRadioHistory.Com 645-9212 Established 1945 120 Minimum L V I N ((80)516) 756-1750 M/C & VISA Order K E 53 756- 1763/FAx KELVIN CATALOG Immilumillimmumgillu10 HUB 0, iyE. MELVILLE, NY 11747 (516) Stock No. 650412 Standard Features AC & DC VOLTAGES DC CURRENT RESISTANCE CONTINUITY TESTER - Buzzer DIODE TEST 10M ohm INPUT IMPEDANCE ACCURACY +/- 0.5% RDG TRANSISTOR F REO COUNTER AUTO INDUCTANCE BATTERY TEST up to 20MHz RANGE Resolution 1 uH with 3200 counts F RE O COUNTER DC CURRENT CAPAÇJITANCL up to 20MHz from l prh to 220uFF AC CURRENT 10 Amp CAPACITANCE TRANSISTOR DC CURRENT from 1 pF to 200uF ANALOGBAR AC/DC CURRENT AC /DC CURRENT TRANSISTOR 10 Amp 10 Amp DUTY 20 Amp 150 LE 200 LE 300 LE 400 LE Stock # 990122 Stock # 9901 23 Stock # 990125 Stock # 990124 $2995 $4995 $7995 150 LE - Student 2C0 LE - Technician 300 LE- AuroRinge 400 LE - Engineer $4995 KELVIN CAPACITANCE Designed to meet IEC -348 & UL -1244 100 Basic Il10.0J KELVIN METER safety specifications. 250 LE # 990087 $ 1 y, $5995 Cases 9 # 990128 Protective 300LE AC & DC 0.5% ACCURACY For Models 100 Basic, 150LE, 200LE, VOLTAGES RANGES: 20mF, $4.95 1X9900881 DC CURRENT 2000uF,200uF,20uF, RESISTANCE 2uF, 200nF, 20nF, 3 1/2 Digit LCD 2000pF, 200pF Case For Model 400LE 69.95 (4990116) CONTINUITY TEST Zero Adjust -Buzzer Safety Test Leads 2 Year Warranty LOW BATTERY INDICATOR Test Socket for DIODE TEST BATTERY TEST Plug -in Components (Parts & Labor) The Ultimate Meter TRUE RMS - LCR - Hz - dBm IN , A Popular Electronics (Reviewed - May 1993) AUTO n =_ j '_ +n "Not only does the Kelvin 94 boast alot of features ... the features go the extra ' kYft distance." trouble- shooting and :14 .. midiIM44 "If we had to run into a burning building to do some emergency in of he 94 would be it!" 9,iii ni7in, 2P 30 40 could carry only one piece equipment, Kelvin tiMllqu11111111IIIIIItIilI1111111111 12 INSTRUMENTS IN ONE - DC VOLTMETER, AC VOLTMETER, OHMMETER, AC CURRENT, DC CURRENT, DIODE TESTER, AUDIBLE CONTINUITY IN MAO MIX AVG ELATIVE OC -AC TESTER, dBm, FREQ COUNTER, CAPACITANCE METER, (4111 OD INDUCTANCE METER, LOGIC PROBE Hz L. 40o,r OFF IL Lo AUTO SLEEP & AUTO POWER OFF . 40 lti / in 0.1% ACCURACY n4/ 400 (2 ON DC VOLTAGES BUILT-IN TO SAVE BATTERY LIFE looG- 41q f 750 with Bypass le TRUE RMS ON II SHOCK RESISTANT 400m400 AC VOLTAGES & CURRENT HEAVY DUTY CASE WITH 4 Om 4M FREQUENCY COUNTER YELLOW RUBBER HOLSTER A 4 40M TO 20 MHz & TILT STAND 4000M '1011 F WATER RESISTANT SEALED CASE 4N Mot LARGE EASY -TO -READ 400n1 LX 40mN 40tf4u CX 3 3/4 DIGIT LCD DISPLAY auto 4 30 DAY MONEY BACK SATISFACTION GUARANTEE power oif L LCR-Hz-dBm j 95 A ,r CIRCLE 36 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com SUPER 41; SN101EQ BOOM MIKE on a Mike = 5000, earphones L-1 = 1005; 0.25" monaural QUICK- SHOOTER 3-conductor phone plug. Goes where regular scopes or DMMs can't. Cuts SCOPE PROBE #1 Telex No. 500-3. repair time by 50 %. Tests parts without removing Attenuation: X1 @15 MHz, 60 pF, or X10 @ 60 (94A018) $39.95 them from the board and gives each kind of com- MHz,12pF. Working voltage: 600VDC (including ponent under test a specific signature on your os- AC peak). Working temperature range: -13 °F (- cilloscope. Available in kit form, with VHS video 25°C) to 158 °F (70°C). Compensation range: tape that explains how to assemble and use the 15pF to 50pF. Avex model #510- SW60S. Quick -Shooter. (94K002) $49.95 each (wool ) $19.50 each SCOPE PROBE #2 Attenuation: X1 @ 10 MHz, 75 pF; X10 @ 100 MHz, 11 pF. Working voltage: 600 VDC, (includ- ing AC peak). Compensation range: 15 - 50 pF. 40MB DATA TAPE Includes 6" ground lead, spring hook, BNC ... for mass storage. 3M P/N DC600A. adapter, I.C. tip, insulating tip, and trimmer tool. (940323) $9.95 each Avex model #510 -SW -1. (94Z002) AUTO SUN CHARGER $24.50 each ADJUSTABLE VOLTAGE Solar auto battery trickle charger. Approx. 13.5" 13.8 VDC REGULATOR x 7" x 0.625 ". Plugs into cigarette lighter socket. REGULATED POWER SUPPLY LM350K. 3 -37VDC @ 3A.(941019) $3.25 (94E007) $29.95 each Rated 5A continuous, 7A peak. Features in- clude illuminated on/off switch, fuse, binding STAINLESS STEEL HARDWARE posts and cigar lighter socket. (94E006) Popular sizes used in electronic work. Assorted, $39.95 each may contain capscrews, Phillips. Sizes 4 -40 and USED VACUUM TUBES up. (92Z005) 3 Lbs. for $5.99 $1.00 each EPROM BLOWOUT! 12AU7 171306 Erase and save $$$! 12B4 19AÚ4 2708 (921003) $ .25 12SK7 21LR8 2716 (921004) $ .75 50 Lb. CARE PACKAGE 2732 (921005) $ .99 SEALED RECHARGEABLE This is not Surplus goodies from Silicon Valley. 2764 (921036) $1.09 BATTERY junk, just material we've acquired in quantities 27128 (921007) $1.29 4.0V @ 5Ah. Size 3.5" x 3" x 2 ". Gates P/N 0809 - too small to catalog: electronic and mechanical 0010/04V. (94E008) $4.95 each subassemblies for everything from robots to rock- 27256 (931013) $1.49 ets. Assortments may include IC's, caps, con- 27C256 (931014) $1.69 TAPE DRIVES nectors, bearings, diodes, hardware, circuit 27512 (94t00í) $1.79 All units are new, with 30 -day warranty. boards, cables. Weird and wonderful stuff. We 27C512 (921008) $1.99 Archive 9050B $9.95 each often get re- orders, so we assume most folks are 27C010 (931016) $2.99 Archive 5945S -1 (SCSI) $19.95 each happy with the assortments we send. Try one. Cipher F420 -90 $9.95 each (92U034) 50 Lbs. $49.95 CARVER FM- STEREO DECODER Wangtek 5099EN24 $14.95 each Works with existing tuner -receiver. Improves stereo reception of stations with weak signals STEPPER IC MOTOR DRIVER and /or multipath distortion problems by as much UCN5804. Single step, two phase and half step as 20 dB. New, in box. Requires moving internal mpdes. 1.5A rating. New (83E002) $4.50 each switch for 120V operation. (94A019) NYLON LACING TAPE $99.95 each 0.200" wide x 250 yards. Waxed finish, black. 68011F 250VDC (94uo17) $29.95/roll ELECTROLYTIC CAP HIGH POWER SWITCHERS! Radial snap -in type. (94P022) ETA Power Systems #804 -1212 -AE: NYLON LACING CORD $3.49 each +5VDC @ 120A; -5VDC @ 10A; +12VDC @ 0.15" wide x 250 yards. Waxed finish, white. 15A; -12VDC @ 15A. (94E010) $10.00 each (940018) $29.95 /roll AUTHENTIC DENTAL FDK #300 -1020 -02 EQUIPMENT CONTROLLER +5VDC @ 100A; -5.2VDC @ 6A; +12VDC @ 3A; SWITCH BONANZA 'Moto -Tool" and container set includes: -12VDC @ 1.5A; +18VDC @ 1.5A. Assorted switches. May include rotary, toggle, Controller- Cabinet for two tools - high/low speed (94E011) $5.00 each slide, "micro," breaker, pushbutton and weird. and forward/reverseswitch LED indicators. Beeps (92B012) 50 for $4.95 when in reverse. Single footswitch controls motor on/off. SIZE "D" Stainless steel tray sits atop cabinet. NICAD AC power cord. BATTERIES One motor assembly with long coiled cord Strapped in pairs (autoclavable). (922031) $79.95 with welded con- EXTRA MOTORS FOR ABOVE tacts. May be sepa- European -made high -performance DC motor with rated with care. coiled cord. Motors require dental handpiece STEPPER MOTOR ASSORTMENT (94E009) $4.95 which is not supplied. (922032) $17.95 (92M001) Ten for $16.95 Visa, MC, AmEx cards accepted. 24 -Hour BBS Minimum order $15 00. (408) 943 -0622 CA 8 OH residents add local sales tax. ALLTRONICS Shipping additional on all orders. 9600 Baud N -8 -1 On -Line Ordering 2300 Zanker Road San Jose, CA 95131 Phone (408) 943 -9773 Fax (408) 943 -9776 =OD . 021054 100 CIRCLE 27 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com grit CAlO Electronic Chemicals LABORATONIESINf for Manufacturing, Maintenance & Service The Next Generation OpticALL SpaticALL Contact Cleaners, OpticALL c - rtes static electricity onopuca : weix ngsura es OpticALLis Conditioners and Preservatives also recommended as ageneral purpose antistatic cleaner on plastic, glass and metal surfaces. StaticALL neutralizes static build -up caused by Even the finest equipment cannot guarantee noise-free operation. One "dirty" connection friction & low humidity conditions. Use on carpets, anywhere in the signal path can cause unwanted noise, distortion and signal loss. Considering floors. clothing & other staticgenerating surfaces. the hundreds (if not thousands) ofconnectidns in electronic equipment today, it is only a matter DustALL FreezALL" of time before they begin to fail. DustALL quickly & safely removes dust, lint & panicles from sensitive electronic equipment, com- ProGold and DeoxIT increase the performance and reliability of electrical compo- puters. lab equip.. optical grade surfaces & other mechanisms & equipment. FreezALLgwckiy and nents and equipment. They provide long- lasting protection. reducing the expense of safely cools circuits to -54'C. Locates intermittent repeated cleaning with expensive ozone- depleting solvents. As a general rule, use components due to heat failure and hairlinecracks on PCBs. ProGold for best performance and protection on plated surfaces and Deoxli as a general purpose treatment. MechaniCALL" High Penetrating Anti -Corrosive Anti -Tarnishing Cleaner & Lubricant. Lubricates & Protects. Dis- ProGold'" Conditioner & Preservative places Moisture, Stops Squeaks, Migrates &Coats Entire Surface. ProGold outperforms all other contact cleaner-, enhancers and lubricants. Due to its unique ElectricALL" properties, not only does it deoxidize and clean Rejuvenating Solution For All Electrical Applica- tions. Cleans. Preserves, Improves & Protects surface contamination, but it penetrates plated Connections, Removes Corrosion & Oxidation, surfaces and molecularly bonds to the base metals. Reduces Wear. Abrasion, Arcing & RFI. This increases conductivity and contact surface area and reduces arcing, RFI, wear and abrasion - the CaiKleeñ 41 major cause of intermittent signals, distortion and Approved Freon TF replacement. Cleaning solvent signal loss. ProGold is the only product that for equipment and parts. Harmless to metal and most plastics & elastomeric parts. No residue. non- conditions & protects plated surfaces and their base flammable, HCFC blend. metals. CaiKleeñ TRP For degreasing. cleaning & defluxing equipment and parts. Removes oil. grease. dirt and contami- nants including rosin flux from PCBs, components and metal parts. Biodegradable. CaiKleeñ IPA Ultra -pure isopropyl a cohol. Cleaning & degreasing solvent for removal of oil, grease & dirt from instruments. equipment & parts. Use on tape heads, discs, guides. switches. connectors. relays, and other parts for general cleaning. DeoxITN & PreservIT' CaiLubé 360 Finest quality cutting and lubricating oil for use on Deoxidizes, Seals & Protects various materials; cast -iron, stainless, titanium, gold. Electrical Connections platinum. non -ferrous metals, synthetics. etc.. Cailubé X -1 OS Instrument Oil DeoxIT is a fast -acting, deoxidizing solution that Contains silicone. Finest quality instrument oil for cleans, preserves. lubricates & improves conductivity use on rubber, plastics and petals. Non -gumming. on all metal surfaces. Use as a general treatment for rust inhibiting, long lasting lubrication. connectors, contacts & other metal surfaces. PreservlT seals, lubricates and preserves metal CAIG Products ... used by those who demand the best! surfaces for protection from oxidation and contamination. For use on clean /new surfaces Dr those pre cleaned with DeoxIT. Boeing Honeywell Switchcraft Dolby Laboratories John Fluke Mfg. Tektronix Both have excellent migration properties that coat the surfaces and protect them from future oxidation E.I. Dupont McIntosh Labs Texas Instruments & contamination. These formulas contain improved deoxidizers, preservatives. conductivity enhancers, Federal Express Motorola Wayne- Dresser anti -tarnishing compounds, arcing & RFI inhibitors and provide extended temperature range. General Electric Nakamichi Xerox Corp. Hewlett Packard RCA and many more! ,,,,, ss 16744 West Bernardo Drive San Diego, CA 92127 -190a CAI TEL: (619) 451-1799 LABORATORIES, INC. FAX: (619) 451 -2799 1-800-CAIG-1 23 I 101 CIRCLE 31 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com CAL L FREE WRITE FOR 800-292-OL C i& S SALES 1 -800- 445 -3201 (Can) EXCELLENCE IN SERVICE FREE CATALOG Line Tracker Dual -Display Electronic Tool Kit Model TK -1000 MV-963 n_'i LCR Meter A professional organizer tool kit at affordable prices. No yg9 should be without this unique tool kit that holds all r w/ Stat Functions student $52.95 the tools you need. (Infra -red Sensor) B +K Model 878 Indudin $39.95 ' The robot follows $239.95 Diagona Cutter a black line Auto /manual range Long Nose Pliers on white paper Many features 6" Wire Stripper t Preassembled PCB with Q factor Solder 60/40 High Accuracy 6" Screwdriver I 6" Phillips Driver Robotic Arm Stereo Cassette Playar Safety Goggles / f, ' Y -01 Kit IC Puller $49.95 Model 3pc Nut Drivers . ! Iron 25W 1°4 Wired TR -18K Control) Iron Stand Movement grabs $16.95 Solder Wick 4114e & releases, Headphones Desoldering Pump lifts & lowers, Included 5 pc Solder Ease Kit from pivots side to side "" 6pc Precision Screwdrivers Digital Digital Digital Digital Function LELIA Multimeter Multimeter Capacitance s LCR Meter Generator EDM -83B + DVM -638 Meter '- -` - LCR -680 Ì FG -801' " )l $175.00 $39.95 CM -1555 $79.95 $149.95 % Almost every I, 11 Functions $49.95 3 -1/2 Digit Square, Triangle feature available with case Measures ca acitors LCD Display L,_ Sine wave Bargain of °, °-.0' from .1 pf to 20,000µf Inductance Freq range the decade 1 uH to 20Mí 3 -3/4 Digit Multimeter Digital Frequency Counter Fluke Multimeters .a BK -390 111111 Multimeter Kit F -1225 (All Models Available Call) LYE - $139.00 w /Training Course -._- ` $225.00 Scopemeters 70 Series -', 0.1% DCV acct' M -2665K s -, 8 Digit LED display Model 97 $1,795 Model 7011 $69.95 - Analog bar graph Wide meas range 10 Series Model 7311 $97.50 10 $62.95 t Auto /manual ranging $49.95 High sensitivity Model Model 7711 $149 Capacitance meas trmit Full function 34 ranges Data hold function Model 12 $84.95 Model 7911 $175 Temperature probe Ideal school project Input impedance 1M1 or 500 20 Series 80 Series M -2661 ( Assembled) $55.00 10:1 input attenuation function Model 2911 $175 Model 87 $289 Triple Power Quad Power High Current DC Wide Band Supply Supply Power Supply - - Signal XP -620 t XP -581 BK -1686 $169.95 Generators i 3 to 14 VDC By Elenco By Elenco Output- SG -9000 12A 13.8V $75.00 C4) $124.95 $79.95 For servicing high 3 fully regulated supplies; 1.5 -15V © Four supplies in one unit; 2 -20V @ 2.5A, power car stereos, RF Frequency 100K- 450MHz 1A 1A, -1.5 to -15V @ 1A or 3 -30V @ 5V @ 3A, -5V @ .5A and 12V @ 1A. All camcorders, ham radios, etc. AM modulation of 1KHz Variable & 5V @ 3A Kit XP -620K $49.95 regulated and short protected Connect 2 or more in parallel SG -9500 150MHz $239.0C Telephone Kit Function Generator Learn to Build & Program Digital /Analog Trainer PT -223K Blcx Computers with this Kit Complete Mini -Lab For Building, $14.95 #9600 Testing, Prototyping Analog and Digital _ - By Elenco Available f' ,.I. it B Elenco Assembled A' $29.95 yin U.S.A. PT- 223 $15.95 'x- Kit $26.95 , _ _, XK -525 Sine, Triangle, Square Wave I[ t Ç i.T. I -- $159.95 AM /FM Transistor Telephone Line _ pn jI Kit 4 Radio Kit Analyzer , °1S0ó MM -8000 XK -5251( I ..1 with Training Course _, `:i °O °° By Elenco . $129.95 Model AM /FM 108 '= $129.00 -. $27.95 From scratch you build a complete system. Designed for school projects, with 5 built -in 14 Transistor, 5 Diodes generator r 1 / Our Micro -Master trainer teaches you to power supplies. Includes a function Easy to punt because °'. write into RAMs, ROMs and run a 8085 with continuously variable, sine, triangular, schematic is printed on the PCB square wave forms. All power supplies are Makes a great school project Kit TT -400K $19.95 microprocessor, which uses similar Model AM -650 AM Only $17.95 Assembled U-400 $26.95 machine language as IBM PC. regulated and protected against shorts. . a _. - WE L s's A UPS SHIPPING: 48 STATES 5% GUARANTEE IL RES 7.5`7, TAX 153 min $10 max) 1245 ROSEWOOD, DEERFIELD, IL 60015 FULL FACTORY WARRANTY OTHERS CALL FAX: 708- 520 -0085 (708) 541 -0710 I'JkPU PRICES SUBJEC I CIRCLE 32 ON FREE INFORMATION CARD 102 www.americanradiohistory.comAmericanRadioHistory.Com FREE PROBES ELENCO HITACHI B +K WRITE FOR WITH ALL FREE SCOPES SCOPES AT GUARANTEED LOWEST PRICES CATALOG QUALITY - ELENCO OSCILLOSCOPES B+K 20MHz 2- YEAR WARRANTY 60MHz S -1360 $775 Delayed Sweep S -1365 $849 Cursor Readout 40MHz DUAL -TRACE Voltage, Time 1 mV /div sensitivity Frequency differences 7Kedd %54Ìá Video sync separators displayed on CRT Z axis input $749.95 Single sweep V mode-displays 2 signals 40MHz unrelated in frequency S-1340 $495 60MHz DUAL -TRACE 1 mV/div sensitivity 2- Channel 71f.edel 2/60 Sweep to 5ns/div Dual time base $575 Signal delay line S -1345 $949.95 Component tester Delayed Sweep V mode -displays 2 signals Beam Find unrelated in frequency Component Tester 100MHz. THREE -TRACE 1 sensitivity 7Kedel 2190 Sweeps to 2ns/div 25MHz Dual time base $1,379.95 Signal delay line S-1325 $349 19kV accelaerating voltage 2- Channel Calibrated delay time multiplier 20MHz ANALOG with S-1330 $449 DIGITAL STORAGE Delayed Sweep 20MHz analog bandwidth Beam Find yKedel 20MS /s sampling rate Component Tester 2522,1 2k memory per channel 20MHz equivalent ?)ef e«da&le Eleafi reure at ,1411daele Pleea $869.95 time sampling HITACHI POPULAR SERIES Elenco DS -203 20MHz, 10MS /s FLUKE SCOPEMETERS V -212 - 20MHz, 2 Channel $425.00 Digital Storage V -222 - 20MHz, DC Offset $695.00 Oscilloscope A handheld instrument that combines a V-422 - 40MHz, Dual Trace $849.00 50Mhz, 25MS /s dual channel digital storage oscilloscope with feature -packed 3000 count V -522 - 50MHz, Dual Trace $975.00 digital multimeter. V -523 - 50MHz, Delayed Sweep $995.00 314.46 93 - V -525 - 50MHz w/ Cursor $1 069.00 $1,225 7114[r 95- $1,549 HITACHI COMPACT SERIES SCOPES .l 97 - $1,795 V-660 - 60MHz, Dual Trace $1,375.00 V -665A - 60MHz, DT, wlcursor $1,449.00 Autoset, automatically V-1060 - 100MHz, Dual Trace $1,549.00 sets voltage, time & trigger V -1065A - 100MHz, DT, w /cursor $1,695.00 Multimeter display; - 2K Word Per Channel Plotter Output V-1085 100MHz, QT, w/cursor $2,125.00 3 -2/3 digits ( >3000 counts) 8 Bit Vert. Resolution 2048 Pts Hor. VC -6045A - 100MHz, Digital Stor CALL True RMS volts; AC or $749 Resolution VC -6025A - 50MHz Di ital Stor CALL Much More AC +DC up to 600V CALL TOLL FREE 15 DAY MONEY BACK GUARANTEE C &S SALES INC. FULL FACTORY WARRANTY 1245 ROSEWOOD. DEERFIELD. IL 60015 1- 800 -292 -7711 ALL PRODUCTS ARE FACTORY NEW FAX 708- 520 -0085 (708) 541 -0710 111711:R1 1 -800- 445 -3201 (Can) PRICES SUBJECT TO C.A.' 1'1If110U1 NOTUI CIRCLE 32 ON FREE INFORMATION CARD 103 www.americanradiohistory.comAmericanRadioHistory.Com TIs",iQ/l1111ì. \T ALFAELECTIRONICS KI,'ST%1%(¡' DMM 89 $199.95 DMM 2360 DMM 21 Fluke Multimeter Fluke 12 $84.95 Most Advanced DMM $119.95 $74.95 Holster C -10 $10 -40H All Purpose & Communication Inductance: 1µH DMM+LCR Meter Capacitance: 1pF -200 F Fluke 70 II $67.5 -80.7 to 81.4 dBm with 40 -12000 Vey Versatile DMM Frequency 1Hz -1MHz Fluke 73 II $94 20 reference impedances Volt, amp, ohm, diode, 75 II Inductance: 1pH -40H Fluke $129 True RMS I continuity Holster C -70 $16 Frequency counter 0 01Hz-10MHz Capacitance' 1pF -40µF 3999 count display Capacitance. 1pF- 50,000µF Frequency. 1Hz - 4MH6 TTL logic, HFE Fluke 77 II $149 Measure AC volt to 20kHz Temperature. -40 -302 F Peak hold Fluke 79 II $169 Ruggerdized case 5000 counts, 0.1% accuracy TTL Logic Test: 20MHz II Rubber holster $8.00 Fluke 29 $169 Auto/manual range, fast bar graph Diode, Continuity Min/Max/Ave/DH/Relative/Zoom Volt, Amp, Ohm Fluke 83 $225 3999 count display Full line of DNMs, Auto power off economy, compact, Fluke 85 $259 Input warning Peak Hold ru gerdized, solar cell Fluke 87 $287 Splash proof Auto power off automotive, heavy industrial Volt, amp, ohm, logic, diode, continuity Ruggerdized case. duty, Fluke 97 starts from $15 95 Ruggerdized case Rubber Holster $8.00 Icp. i MULTIMETER Scope Meter$1785 Rubber holster included Temperature probe $7 00 LCR Meter 131D LCR Meter 814 Frequency Counter $229.95 $189.95 FC -1200 $129.95 Most Advanced LCR Frequency:0.1 Hz -1 25GHz Display 8 digit LCD Dual display:UD or C/D Best Resolution LCR Inductance: 0.1pH -200H Penoct 0.1µs -0 1s Inductance: 0.1 pH -1000H Capacitance: 0.1 pF- 20,000µF Records Max/Min/Average Capacitance:0. 1 pF- 10,000µF Data hold, relative mode Impedance:) mO-10M0 Resistance: 1m0-20M0 Telescoping antenna $8.00 0.7% basic accuracy 1% basic accuracy Deluxe case $5.00 leakage Dissipation factor 8 Q factor Dissipation factor indicates Also Available: Serial 8 parallel mode in capacitor and Q factor in inductor AC /DC clamp meter,Light meter, Relative mode for comparison Zero adjustment to reduce parasi- Thermometer, pH meter, High and to remove parasitics tics from test fixture voltage probe, Digital caliper, Best for high frequency RF Anemometer Electronic scale, Statistics, tolerance, Force gauge,Tachometer, Best for design, incoming and surface mount components SMD and chip component test probe Stroboscope, Humidity & ÉMF testing 8 production adapter, Sound level meter, SMD and chip component $25 00, Deluxe carrying case $5 00 Frequency counter SWR/field test probe $75.00 strength /power meter, Dip meter 20 MHz Oscilloscope with Delay 20 MHz Digital Storage A 4 ) I Sweep PS -205 $429.95 Oscilloscope DS -203 $729.95 Dual Trace, Component test, 8" CRT, X -Y Operation, TV Swttchable between digital and analog modes k Sync, Z- Modulation, CH2 Output, Graticule Ilium, 2 probes 2 K word per channel storage each has x1,x10 switch. Best price with delay sweep. Sampling rate. 10 M sample /sec 4 PS -200 20 MHz DUAL TRACE $339.95 8 bit vertical resolution (25 Lerel /div) ï PS -400 40 MHz DUAL TRACE $494.95 Expanded Timebase 10ms/dly - 0.5 s/div. PS-405 40 MHz DELAY SWEEP $569.95 Refresh, Roll, Save all , Save CH2, Pre -Trig PS -605 60 MHz DELAY SWEEP $769.95 Plotter Control , : k` Scope Probe: 60MHz x1, x10 $13, 100MHz x1, x10 $22 250MHz x1, x10 $29, 250MHz x100 $39 DC Power Supply DC Power Supply Triple Output PS -303 $159.00 PS -8202 $499.95 0-30 VDC , 0-34 output Two 0-30 VDC , 0-3A outputs Constant voltage 8 constan current mode,,;; One fixed 5VDC, 3A output 0.02% s 2mV Ere ragtiaöor Capable of independent or tracking operation 0.02% s 3mV load 'egutetlo, Constant voltage and constant current mode 1 mVrms noise anc apple Four digital meters for volt and current display Short circuit and overload pi otected Excelent regulation and low ripple PS -8200 with digital voronetar $179.00 t Short circuit and overload protected Also available: 30V'5A, 60W3A, 60V/5A Also available: 30V/5A triple output $549.95 16V/10A, 30V /10A Dual tracking 30V/3A, 30V/5A, 60V/3A. 60V/5A "meow. o : _- .... _. E'r rrftkä. RF SIGNAL AUDIO GENERATOR FUNCTION GENERATOR GENERATOR AG -2601A $119.00 FG -2100A $169.95 0.2 Hz -2 MHz in 7 ranges SG -4160B 10Hz - 1MHz in 5 ranges $119.00 Output:0 -SVrms sinewave Sine, square, triangle, pulse and ramp 100 k-tz- 150MHz smewave in 6 0- 10Vp-p squarewave Output 5mV- 20Vp -p ranges Synchronization: +3% of oscillation 1% distortion, DC offset t 10V RF Output 100mVrms to 35 MHz frequency per Vrms VCF: 0-10V control frequency to 1000.1 Internal 1 kHz, External 50Hz -20kHz Output distortion: AM modulation FUNCTION GEN/COUNTER 0.05% 500Hz - 50kHz Audio output 1 kHz, 1 Vrms 0.5 % 50Hz - 500kHz FG-2102AD $229.95 Output impedance: 600 ohm Generates signal same as FG -2100A Frequency counter 4 digits Feature TTL and CMOS output RF SIGNAL AUDIO GEN. /COUNTER GEN. /COUNTER SWEEP FUNCTION /COUNTER $329.95 SG -4162 AD $229.95 AG- 2603AD $229.95 GEN. 0 5H to 5 MHz in 7 ranges Generates RF signal same as Generates audio signal same as Sweep: Linear 10.1/Log 10.1 20ms b 2s SG -41608 AG-2601A AM Modulation Frequency counter 1Hz - 150 MHz 1Hz- 150MHz Frequency counter Gated Burst, Voltage Control Generator for internal and external source for internal and external sources Generator Control Voltage 8 6 digit counter Sensitivity <50mV <50mV Sensitivity 1Hz -10MHz for internal & external sources ALFA ELECTRONICS (800) 526- 2532/(609) 520 -2002 15 DAY MONEY BACK GUARANTEE. 1 YEAR WARRANTY FAX:(609) 520 -2007 CALL OR WRITE FOR FREE CATALOG AND BEST OFFER. 741 Alexander Rd., Princeton, NJ 08F.40 104 Visa, Master Card. American Express, COD, Purchase Order Welcome CIRCLE 26 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com Are Cable Companies Sucking You Dry? Take a Bite out of High Rental Fees with your own Converters & Descramblers Everquest Panasonic Jerrold Zenith Pioneer t Scientific Atlanta Oak Eagle Hamlin Tocom F, Toll-Free 1 800 624 -1150 Call today for a FREE catalog! Member of National Consumer Memrbe of Cable Asaodation 875 S. 72 Street Omaha, NE 68114 National Cable A.snociation 105 www.americanradiohistory.comAmericanRadioHistory.Com 1 YEAR WARRANTY Unbeatable Discount Prices 1 5 DAY MONEY BACK GUARANTEE POWER SUPPLY FREQ. COUNTER .nun**. Four Instruments in One Instrument 0 Function Generator Power Supply 1111111111111= _;°633f MT-1 00 Sine, Square, Triangle, Pulse, 3 -1/2 Digit LCD Skewed Sine, Ramp, TTL Triple output: #1. 0 -50V, 0.5A MAX !}q. $595. 0.02 Hz - 2MHz #2, 15V, 1A #3. 5V, 2A © Frequency Counter 4 Digital Multimeter $399.00 8 Digit LED 3 -1/2 Digit LCD 1 ACA tie zJ:11, TA . Hz - 100MHz DCV, ACV, 0, DCA, ± (1 Hz + 1 dgt. + Time ± (0.5% + 2 dgts) SWEEP FUNCTION GENERATOR MULTI -METER Base Error) BEST BUY! O'SCOPES 25 MHz Dual OS- 3304/3324, 25 MHz OS-3315, 40 MHz Sweep Delay Goldstar Oscilloscopes OS- 7020A. 20MHz Dual .2 yz. r-Cl/[GOI-[I14V2 9f/warmly $29 DC to 25 MHz. Dual Channel DC to 40 MHz. Dual Channel at 4-5.25. $395.00 00 6" Rectangular CRT with Delayed Sweep 100nS to 1 Sec. OS- 902RB. 20MHz 25 MHz Dual Internal Graticule 10x8cm 6" Rectangular CRT with Internal Dual /Read Out w /Component Test (Phillips P31) Graticule 10x8cm (Phillips P31) ray. 4795. $595.00 $595. Uncalibration LED. Uncalibration LED. OS- 9040D. 40MHz Delay rat $695. $575.00 High Sensitivity 1 mV /div to High Sensitivity 1 mV /div to 79.00 OS- 904RD. 40MHz 20V/div X -Y modes, Z Axis 20V,div X -Y modes, Z Axis Dual/Read Out 40 MHz (intensity modulation) (intensity modulation) Dual/Delay /4 075. $695.00 Rise time 14n Sec. or less. Rise time 8.5nS or less. OS -8100. 100MHz 8 Trace Full TV Trigger for TV -V & TV -H Full TV Trigger for TV -V & TV -H lap. 41395. $1,145.00 9900 Acceleration Potential 2kV Acceleration Potential 12kV Other Models C44.. Airs FG-1 50 2MHz Sweep / Function Generator 2t &J High Resolution Frequency Counter w/Built-in Frequency Counter 1.0 GHz Counter F//C -200 1.0 Hz - 1.0 GHz 4.9. $395. $229.00 $.995. $199.00 8 Digit LED Display 4 Digit LED Display 9.. Auto & Manual Range 0.2 Hz - 2.0 MHz Measured Value Hold Sine, Square, Triangle, Pulse, 4 Selectable Gate Times Skewed Sine, Ramp, TTL Below 20mV Input Sensitivity Linear or Logarithmic Sweep 1 mil & 500 Input Impedance Variable DC Offset Control 10:1 Input Switchable Attenuator 10 MHz Frequency Counter lit $199. $119.00 RF Signal Generator, 50 -310 ry 099. $11i 9.00 Audio Generator, AG -350 100KHz 150MHz 10Hz -1MHz 100KHz - 150MHz, 6 Ranges. 10Hz - 1 MHz, 5 Ranges. Accuracy : ± 5% Accuracy : 5% ± 2 RF Output: 100 m Vrms Output Inpedance : 6000 (Up to 35MHz Unloaded) Sine Wave Output Modulation Range : 10Hz - 1 MHz Int. 1 KHz (AM) 30% Output Voltage : 8 Vrms Ext. 50Hz - 20KHz Square Wave Output Audio Output: 1 KHz Min 2 Vrms Range : 10HZ - 100KHz Output Voltage : 15Vp-p 4y.. $249. $159.00 DC Power Supply, PS-500 ray. $399. $289.00 DC Power Supply, PS -540 0-30VDC, 3A 0-16VDC, 0-10A 0 - 30VDC Continuously Variable 0 - 16VDC Continuously Variable Regulation : 0.01 % + 3mV Regulation : 0.01 % + 3mV : 1 Ripple Voltage : p-p 2m Vrms; 5 1 mV Ripple Voltage p -p S 2m Vnns; S mV 0.1A - 3A Constant Current 0.1A - 10A Constant Current Regulation : 0.2% + 3mA Regulation : 0.2% + 3mA S Ripple Current : 5 3m Arms Ripple Current : 3m Arms Short Circuit Overload Protection Short Circuit Overload Protection w /Indicating Lamp w /Indicating Lamp Oscilloscope Probes Auto Bargraph w/Hoister Multimeter D M3000 Multi-Function w/Holster Switch Selectable as.M X1 /X10 M 3 -1/2 Digit DM3050 Only .00 1.5" Big LCD Frequency $59.00$ 59.00 Heavy Duty, 20A Continuity HP-9060, 60MHz Capacitance Beeper Auto & Manual DM3050 ay. $29. $15.00 p,,, TR -hFE 3 -1/2 Digit Diode Bargraph ^' 32 Seg. $54.00 Low Battery DM31 00 Only HP-9150, 150MHz Diode Test Mark Temperature w/ Continuity Beeper Range Optional Probe ray 449. $22.00 Data Hold DM3100 Over Auto Power Off $ /5 $8.00 49. $99. Protective Continuity HP-9250, 250MHz Low Battery Mark Holster Range Mark // 0 Beeper Over Ti lt Stand lay $59. $29.00 Holster w VISA. BMC . k .r 13700 Alton Pkwy., Ste. 154 -282 -3221 800- 532 '. Fax 1711 106 Irvine. CA 92718 (714) 586-2310 CIRCLE 30 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com Introducing the AM4REL Analog and Digital Power Supplies... EITHER CHOICE PLACES MORE FEATURES ON YOUR BENCH -SAVES YOU MONEY! AMIREL LPS-100 Series -For Performance That Sets New Industry Standards! Low Output noise rating less than 0.3mV. Line/load regulation rated at low 0.01% + lmV. Transient response time of 50p Sec. Overload protection. Output enable /disable Coarse and fine voltage /current adjustment. Auto series/parallel operations for triple output supplies. 3 year full warranty- not 1 or 2 years. AMREL LPS-300 Series --Offer Features And Prices That The Competition Can't Beat! Microprocessor controlled. User friendly keypad data entry. Low output noise rating less than 1mV. line/Load regulation rated less than 2mV. Output enable/disable and Power- off memory. 2 year warranty. Optional RS-232 interface capability. Mt,ilcl I.I'ti- I0I I.l>ti 02 LYS-103 I.PS-104 LPS-105 LPS-106 LPS-301 LPS-302 I2S-303 LPS-304 LPS-305 li.rting 30V/IA 30V/2A 31)VßA +30V/1A +30V/3A 60V/1A 15V/2A(10 15V/4A(H) 30V/3A +30V/IA +30V/2.5A -30V/1A -30V/3A 30V/1A(L) 30V/2A(L) -30V/1A -30V/2.5A 36.5V/3A 36.5V/3A 5V/2A 3.35V/3A Retail Price $195 $225 ,2V0 5395 $495 5245 5"'+9 5299 5369 5399 $599 8931 Brookville Road Silver Spring. Maryland 20910 Fr- o ,. CIRCLE 46 ON FREE INFORMATION CARD Forest TONY TALLPS ORIGINAL F F I ) Eeeironics TELEVIEW DISTRIBUTORS Ince WHERE OUR VALUED CUSTOMERS' Dos/NESS Are you overpaying ...... your cable company? IS HONESTLY APPRECIATED You are if .. . e . e you are leasing their .SUR PRICES equipment. Forest Electronic, Inc. offers a comp'e'e line of 1 800 847 37 73 New Cable Equipment that is ku!ly Compatible Baff Zfa %fay witt your cable system. DAY A!1 systems come with: Remote Conit -cl, & 90 GUARANTEE = Parente! Guidance Feature. Vc lume Control is a.so ,vailable. SCIENTIFIC ATLANTA Al Equ.'pment is fully guaranteed & comes witf a 30 day money back op ion. JERROLD PIONEER 94 For More Information Cull Us At: 800-332-7996 OAK HAMLIN FAX: 708 -860 -SO48 107 HRS. M - F 9 -4 PST NO NV. SALES www.americanradiohistory.comAmericanRadioHistory.Com BRAND NEW 1 YEAR WARRANTY LATEST DESCRAMBLER MODELS Add On Descrambler for all JERROLD Systems (Except Base Band) Guaranteed to 9 6 -10 Work Anywhere Coast to Coast (Model JD -3) $119 1 -5 Add On Descrambler For All PIONEER A 2( Systems. Guarantered to Work Anywhere $89 6 -10 Coast to Coast. (Model PD -3) $119 1 -5 Add On Descrambler For All SCIENTIFIC ATLANTA Systems (Except 8570, 8590, 8600). Guaranteed to Work Anywhere $89 6 -10 SCIENTIFIC Coast to Coast. (Model SAD -3) `119 1 -5 ATLANTA 8580 Features Wireless Remote Control Favorite Channel Recall Parental Lockout BRAND NEW 2596bO 1 YEAR WARRANTY $289'-5 ADD ON DESCRAMBLERS ZENITH 1 -5 6 -10 Features FTB-3 49.00 39.00 Wireless Remote Control TVT OR TBI 55.00 47.00 550mHz (99 Channel) capacity $289,-5 Volume Control SA-3 59.00 49.00 Parental Lock -Out KN12-3 59.00 49.00 Programmable Favorite MLD1200-3 49.00 39.00 Channel Memory CONVERTERS 1 -5 6 -10 PANASONIC 1453G 79.00 69.00 JERROLD DQN7 -3 75.00 65.00 STARGATE 2001 75.00 65.00 Call for other models 1470 OLD CC UNTRY ROAD, FREE COLOR CATALOG! SUITE 315 - P.E. jr PLAINVIEW, NY 11803 Wnco NO NY SALES 1.800- 950 -9145 108 www.americanradiohistory.comAmericanRadioHistory.Com QUALITY PARTS DISCOUNT PRICES FAST SERVICE HUGE SELECTION JUMBO SAVINGS 640 X 480 DOT LCD DISPLAY JUMBO LEDS Sharp # LM64P70 r Liton # LTL 327C - 8MM Brand new 640 X 480 dot LCD flat panel Ir Ideal for eye -catching indicators and display with on board high speed drivers displays. A recent quantity purchase and built -in CCFT backlight (inverter not of these BIG, 8mm diameter, red diffused LEDs included). Logic voltage: 5 Vdc. enables us to provide some very special pricing. LCD driver voltage: -16.2 Vdc. The leads on these devices have been trimmed to Viewing area 6.8" X 5.1". 0.325 ", leaving plenty Overall module size: 10.1" X 6.23" X of room for soldering. 0.33". These displays sold for over Normally these parts 5 for $10- $300.00 new. Includes specs. and would sell for more hook -up information. than twice our price. CAT # LED-23 @ 0 0 CAT # LCD -17 $45 EACH I[ 1 100 for $15.00 1000 for $120.00 I 9 Vdc @ LONG LIFE 200 ma. LASER TUBE MAGNESIUM WALL TRANSFORMER BATTERY Three prong grounded plug. 6 foot long cord terminates to Rayovac # three color -coded pigtail leads. BA-4386/ PRC-77/ CAT# Siemens# LGR 7659. PRC-25 DCTX -9200 1 mW helium -neon laser tube. 22.5 mm diameter .K 146 mm long. 1.7 mrad beam divergence. 7 kV start voltage. H $2 I kV operating voltage. 3.5 mA current. 100 for $180.00 CAT# LT-1 $2500 H Built for military I I communications equipment including PRC-77 and PRC -25 radios. Output jacks for VIDEO /RF "HI -8" VIDEO 14.4 volts and 3 volts. Extremely long shelf life, Originally should be good for 15 years storage. Ideal for made for MODULATOR emergency CASSETTE applications. 6 pin output jack can be use with the (USED) used with banana plugs. Commodore 9.375" X 3.57" X 2.07' $4óo computer, 8 mm Video Camcorder Users!. cardboard jacketed case. these good EACH 3 lbs. quality video CAT# MB-4386 SONY Hi modulators -8 T-120 Top quality. metal were probably particle 120 originally minute video cassettes. 1 3/4" SPEAKER designed for Used for a short 9 Vdc use, t me, then bulk - but 1 they operate well on 8 ohm, watt speaker. 6 -12 Vdc. They accept color erased, each Very video and audio, and a selector heavy magnet for its size. switch is provided for cassette has its Speaker output to channel 3 or 4. Easy to o.d. 1.8 ". hook -up. Requires a cwn plastic storage 6 box. New, these high quality Magnet ad. 1.35 ". -12 Vdc power supply or wall transformer and a con- cassettes sell for considerably more. nector to interface with your audio /video source. CAT# SK -175 Satisfaction Guaranteed. Output is an RCA jack. Hook- up instructions included. .toloo 00 3" X CAT# VCU-8 EACH 1.47" X 0.75". $1 EACH 110 for $11.00 I CAT# AVMOD -3 I 10 for $28.00 100 for $250.00 I MANUFACTURERS - We Purchase EXCESS INVENTORIES... Call, Write or Fax YOUR LIST. CALL, WRITE or FAX For A MAIL ORDERS TO: Page ALL ELECTRONICS CORP. FAX (818) 781 -2653 Free 64 P.O. BOX 567 CATALOG. VAN NUYS, CA 91408 -0567 INFO (818) 904 -0524 Minimum Order $10.00 All Orders Can Be Charged to Visa, Mastercard or Discover Accepted Checks and Money Orders (48 by Mail Orders Delivered in the State the U.S.A. of California must include Calibrnia State Sales Tax NO C.O.D Outside Shipping and Handling $4.00 for the 48 Continental United States - ALL OTHERS including Alaska, Hawaii, postage. Canada Must Pay Full Shipping P.R. and send $2.00 Quantities Limited Prices Subject to change without notice. rim-1 109 CIRCLE 28 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com CircuitMaker® vs. Electronics Workbench A NEW STANDARD HAS JUST BEEN SET ! Digital simulation State -Of- The -Art Analog Simulal.ion Superior feature where the state of every win- Cii cilitfvIker has an exclusive Trace ÇircuitMaker' analog simulation results are shown in graph node is indicated in color as the simulation runs. You can monitor as that powerful, interactive analysis options. You can will allow set edge or level break - dows provide can many waveforms as your screen plot multiple waveforms by clicking on the desired nodes and points for analysis, and interactively see thee state of any node by select linear or logarithmic axes. Horizontal and vertical cursors the logic probe to it. The data sequencer provides 11)24 words facilü.ate quick and-accurate measurements. You can also zoom in on of pattern data. Additional digital instruments include ASCII and HEX any portion of the graph to obtain additional detail. input keys and .an ASCII display. CircuitMaker includes tri -state devices and devices have programmable propagation delays. Electronics Workbench offers a single, small scope or Bode plot instrument window. The windows are not sizeable and only two Electronic Workbench has no interactive logic probe or Trace waveforms can be plotted at a time. EWB has a single measurement ASCII keys. Their word generator" is instru- capability and no Hex or cursor and provides no direct way to read results-from the limited to 16 words. EWB does not have tri -state devices and digital ment. devices do not have programmable propagation delays. ClrcultMaker File Ldit Macros Qptions View L1 L2 1 L4 1.5 Lb 17 L8 IORA l I q .ia ElM Itl -1 characteristic (4) G%CIRMAKERIDIFFAMPLCIR 90:141) DC transfer 1/xc 9s.o0a X1:-0.100 e-1:0.195 Ya:0_120 11:1.433 a-1:6.695 V(12) 9 70 8 V V(13) Transient Analysis (2) AC Analysis (5) 0.:1.744. 01:0.744a - 1:1.000+ . 01: -0.103 .- 1:11.75 Ye: 11.64 Offsets X:0.000 0:1.500 2111 V)13) Comprehensive High- Performance Device Libraries Schematic Capabilities CIlrcuitMakkr puts you in control of your CircuitMakkeçr includes libraries containing iL7ác,.°, bussing, page programmable, TTL, CMOS, generic analog schematic withSmartWiresTM devices, and many powerful UO connectors, and rubberbanding. You can Fa- and digital bel devices and pins, add fully stylized multi - devices. With CircuitMaker's macro function netlist. and easily create our own line text, and create a parts list or you can quickly Competitive With the Macro feature you can add user funcional devices and symbols. Now that's device library. giving, you the tools you need to get the job Upgrade Offer defined symbols to your done nght! You deserve the best. Upgrade from any Electronics W rkkensh dictates wire place- competing product for only _$99. New ment to you. EW B limits your overall "work- Wro içs Workbench ships with only 17 can purchase CircuitMaker for a has no want additional devices users bench" layout to 1 x 2 pages. EWB digital devices. It you limited time at a special introductory bussing, pageconnectors, pagebreaks, print you pay extra. price of just $269. Suggested Retail Price scaling, labeling, free textt -relds netlisting, $299. zoom, undo, and no Toolbar or toolbox. Technical Support .t\ //i MiçroCodç Engineering offers free phone support from knowledgeable engineers. And, you won't find yourself listening to music when you call for help. FREE Interactive Image Technologies offers 3 free calls and then you have to pay for all subsequent calls. owners. 3.0 for Windows. All product and company names ate trademarks of their respective _\ FUNCTIONAL Comoer'sn based on Ci.cuiiMaker 2.0 for Windows and Electronics Workbench DEMO VERSION MicroCode Engineering available on most major BBS' CALL 800 -419 -4242 1943 N. 205 W. Orcm. UT 84057 or sent direct for 510 s&h Risk free 30 day money back guarantee. Fax (801) 226 -6532 Phone (801) 226 -4470 CIRCLE 42 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com New paw Satellite Television ertul :.- Shalle Satellites Order Your FREE Catalog/Buyers Guide Today! Smaller Dish Less $$$ KU -BAND SYSTEM Package INCLUDES all of this: 3f1 Quality alum dish 1 Pansat BR 1100 Receiver Polar tracking mount Polarity switching feed Low Temperature LNB 100ft All in one ribbon cable Site data coordinate sheet The World Supplier of Satellite T.V. Products... "Down To Earth Prices" Satellite Analysis and Antenna C-BAND SYSTEM Aiming Package INCLUDES all of this: 7ft ORBITRON mesh Software dish uniden 4400 IRD Polar tracking An extremely valuable tool for designing and mount and installing TVRO's, tailored for ease of use by motorized arm professionals and dealers as well as by technically Chaparral Polarity switching feed orientated TVRO owners. Demonstrates how Pico dish 25 °Low Temperature LNB changing parameters such as dish size or LNB Tuning 10011 All in one ribbon cable Meter noise temperature affect picture quality. The Optional Decoder module program performs both TVRO system analysis and antenna aiming. The analysis subcomponent, is <\)11/4 Bulz-l- Tuning especially useful for predicting performance when Meter 'AI yo need to supply *Complete viewing signals from a particularly weak satellite. Now with 15 gland pole to mount SYste.r The aiming subcomponent calculates azimuth and 24,j audio alert 1h m. (3.5 O.D.) elevation angles and range to all satellites within Only "view" of a TVRO. The names and latitudes of all $859 world -wide C and Ku -band broadcast satellites, TUNE YOUR DISH presently in service or to be launched by 1965, are LNBs listed. The user simply enters TVRO site latitude TOITS MAXIMUM! and longitude. New Lower 5.25' disk $49.95 Temp's 3.5" disk $49.95 Dish tuning meters are a must for the serious dealer or satellite system owner. Saves time, Hemt Technology Commercial Grade frustration and money. Use when installing a new SATELLITE SYSTEM system, moving your dish, re- alignment of a dish DO-IT- YOURSELF that has been moved by wind, host heaves etc., 35' LNB C-band 4GHz $ 79 INSTALLATION VIDEO gets you right on the satellite belt for the best 25°^ LNB " " 95 possible pictures! 'Wow You Can Watch It Being Done" 0.9dbLNB Ku-band 12GHz $ 89 Install or "Tune up" your satellite system in no Pico meter (meter tuning) $89.95 0.7dbLNB " " 99 0.6dbLNB " ` 119 time fiat with this professional video. Bulz -I -IV meter (meter & audio alert) 154.95 VHS or Beta (45 Min.) $33.95 r All Major Credit Cards Accepted Sky vision Inc.® MESH DISHES by ORBITRON 1048 Frontier Drive, Fergus Falls, MN 56537 Toll Free 800 -334 -6455 Mail in coupon or call today for the SKYVISION Satellite TV Product Catalog/Buyers Quality Demonstrated Guide Delivered free to your mail box in U.S. and its possessions. by Performance Send Free Domestic Satellite TV Products Catalog Orbitron antennas ( "size Send International Satellite Catalog (For International Catalog add $8.00 to coverSBH) for size') are known the world over for their Name Phone ( superior reception and ftt picture quality. 7tt dish & polar tracking mount $259 t . Address 0 8.5ft " 319 State Zi 10ft 369 ,1- C. loft H D. " 449 Install A System, Upgrade & Repair Yourself And Save SSSS 12ft 649 L Call Toll Free 800 -6455 International 1 -218 -739 -5231 Fax 218-739-4879 -334 11 www.americanradiohistory.comAmericanRadioHistory.Com CELLULAR SOFTWARE AND MODIFICATION GUIDES Call Spy Supply for all of your Cellular needs! We Carry: We have the new Motorola CELLULAR SOFTWARE Software (We have the software to do New Motorola Phones) and Cables CELLULAR CABLES (For the Motorola, Panasonic, and Nokia Phones) CELLULAR MODIFICATION GUIDES (Covers all cellular manufacturers) CELLULAR PHONES (We carry a complete line of cellular phones) FREE TECHNICAL SUPPORT! SPY SUPPLY We now offer Cellular Don't Get Find out why the Phones cloned with your Ripped Off! CIA - FBI - DEA existing number! Buy a SECRET SERVICE Have ordered from our catalog handheld, transportable Before you buy our or car mounted phone competitor's manual, To receive yours, send $5.00 to: SPY SUPPLY ready to go and have call and ask if they offer only one monthly bill! 1212 Boylston St. #120 FREE TECHNICAL SUPPORT Chestnut Hill, MA 02167 SPY SUPPLY, 1212 Boylston St. #120, Chestnut Hill, MA 02167 (617) 327 -7272 Sold for educational purposes only 112 www.americanradiohistory.comAmericanRadioHistory.Com GENUINE ELECTRONICS, INC CABLE TV AND CABLE TV ELECTRONIC EQUIPMENT Converters & Descramblers Genuine Electronics, Inc can help you Compatible with with virtually any electronic need: Jerrold, Scientific Atlanta, * Cable TV Descramblers /Converters Pioneer, Oak, & Hamlin * Bullet Protectors Equipment * Immunizers * Voice -Mail Systems BRAND NEW! * Digital On -Hold Announcers 90 -DAY GUARANTEE * Laser Pens LOWEST PRICES 90 -Day Guarantee & Lowest Prices! Volume Control & Parental Lockout Available Greenleaf Electronics Call 1- 800 -742 -2567 GENUINE ELECTRONICS, INC NO ILLINOIS SALES It is not the intent of Greenleaf Electronics to defraud any pay television operator and we will not assist any company or individual in doing the same. 1-800-833-2915 MCM ELECTRONICS... WE'VE GOT IT ! OYER 41000 Service Selection Value ITEMS! for all your electronic needs OHnEHi SAVE TIME - Shop the only source - $H1TW EIl FRO" THE'Y0.REHOUSf MCM ELECTRONICS! With over 21,000 items stocked, we're ready to ship your 15T ) YOU' order within 24 hours. You'll find test equipment, semiconductors, repair parts, audio components, amateur radio, computer products and much, much more! Call today for your free 288 page catalog and you will discover ... When you need it, WE'VE GOT IT ! To request a FREE catalog ... 1- 800 -543 -4330 Product questions 1- 800 -824- TECH(8324) MCM IS NOW AN RCA /GE PREMIER DISTRIBUTOR! .. * k ;; MCM ELECTRONICS`" ° 650 CONGRESS PARK DR. CENTERVILLE, OH 45459 -4072 A PREMIER Company POP -11 GET FAST DELIVERY FROM OUR DISTRIBUTION CENTERS IN DAYTON, OH AND RENO, NV! CIRCLE 52 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com special project READERS: TELL US WHAT YOU THINK ABOUT THIS ISSUE 1. Where did you get this 9. Do you earn your living Are you interested in magazine? working in the electronics helping us make this Subscription Newsstand industry? magazine as good for you as Yes No it can be? Then be one of the 2. Are you: first to join the 1994 Male Female 10. If you were the editor, would Popular Electronics Reader you make the articles: How old are you: More complex Council. Twice a year you'll 3. I am years old Simpler be asked to complete a questionnaire. It will detailed 4a. Highest education achieved? Longer in tell us about the things this Attended technical school El Shorter magazine that are important Graduated technical school to you and give us the Attended College More build it information we need to make Graduated College El Less build it this your best possible Earned PhD El More how to reading. Less how to If you would like to be 4b. Do you considered for this special Hold FCC license 11. What articles would you Popular Electronics project, Hold other license, Certif. publish? take a few minutes to answer 5. What is your total household the questions on this page income? and return it to us. Total household income, before While we cannot accept taxes is $ everyone, we will randomly 12. What new columns would you select our participants, giving 6. Name the article in this issue add? each one of you an equal that you liked the best. chance of being selected. Please mail the completed in this issue questionnaire no later than 7. Name the article that you liked the least. November 30, 1994, to: 13. What else would you change? Total Recall Research Group Use a separate sheet for your 8. Name the department or comments. Please give as Box 4079 regular column in this issue much detail as possible. Farmingdale, NY 11735 -9622 that you liked the best. Name Thank you, and I am looking forward to hearing 8a. Name the department or Address regular column in this issue from you! City Larry Steckler, that you liked the least. State, Zip Editor-in -Chief 114 www.americanradiohistory.comAmericanRadioHistory.Com Make your projects speak for themselves.. Ours d Proudly Announces DIGITAL VOICE RECORDERS The Arrival Of Laser PCBs Record up to 218 seconds 1 to 8 messages Introducing Laser Printed Circuit Boards - A revolutionary High quality speech 12 bit new making in -house prototype PCBs quickly Switch -closure actuation method of Sample rates up to 20Khz and easily. Our process is simple and requires no special On -board backup equipment. A computer designed PCB can be printed onto Direct speaker output our treated copper by using a standard laser printer. The Wide operating range copper is then adhered to the provided FR4 board and Small size 2.6" X 2.6" Made in U.S.A. etched. This technique allows you to go from design to MODEL Audiod'218 prototype in less than 30 minutes. Allow us to show you Call or write for more information how you can produce your proto PCBs in -house and save OEM price and delivery available time and money. Custom designs and enclosures Single unit price $149.00 plus s +h Ask about our new customer discount! Quantity pricing as low as $99.00 CALL TODAY: 402 Riley Road, New Windsor, NY 12553 1 -BOO- 251 -7775 (914) 564 -5347 FAX: 1-407- 743 -3161 Specifications and price subject to change. CABLE CONVERTER SPECIALS 1 5 10+ Sigma 550 99.95 75.00 70.00 NEW - 86 channel O & I compatable Last channel recall - lightning protection 1 year warranty Timeless 550 P/C 99.95 75.00 70.00 Same as above, different manufacturer with parental lockout. HRC switchable 1 year warranty Northcoast Excell 109.95 85.00 75.00 American manufactured!! 70 channel Fine tuning - Standard HRC tuning through remote, sleep timer. Green LED w /dimmer NEW ITEM Parental lockout. Deluxe! AB twinline available... Zenith Universal Remotes Fully Programmable New Program / Learn Type United Electronic Supply Combines both functions for P.O. Box 1206 -RE VCR / Cable / TV / Stereo Elgin, IL 60121 All in remote. 708 -697 -0600 As low as $ 19.95 No Illinois Sales Hours: Mon - Fri: 8:30 - 5:00 pm CST 24 Hour Answering Machine for orders 115 www.americanradiohistory.comAmericanRadioHistory.Com Electronics made Easy with UCANDO AFFORDABLE DATA ACQUISITION r- rrmrrc Drwrnr, mrt.!Wgie moon 45 MM1 aWUnru MODEL 30 $79.00 MODEL 45 $189 PLUGS INTO PC BUSS RS -232 INTERFACE 24 LINES DIGITAL I/O 8 DIGITAL I/O 8 CHANNEL -8 BIT A/D IN 8 ANALOG INPUTS 12 BIT COUNTER 2 ANALOG OUTPUTS UP TO 14K SMP/SEC 2 COUNTERS -24 BIT Complete Course in Basic Electronics Includes 6 one hour videos and 6 workbooks. Everything you need to learn basic electronics. You will learn about Direct Current, Alternating Current, Semiconductor devices, Power supplies, Amplifiers, and Oscillators. These videos are 100% computer MODEL 70 $239 MODEL 150 -02 .. $179 animated, they make learning electronics easy and RS -232 INTERFACE RS -232 INTERFACE fun. Don't waste any more of your valuable time 18 BIT IUD TRMS, 20 AMPS 5.5 DIGIT 12 BIT A/D reading and re- reading the same material to try and UP TO BO SMP/SEC OPTO- ISOLATED CHANGE RANGES, understand these simple concepts when you can AC /DC, VIA RS -232 "see it happen." These videos will ... teach you Prairie Digital, Inc. more in less time ... allow you to learn at your own 846 17th Street Industrial Park Prairie du Sac, WI 53578 (608) 643 -8599 FAX: (608) 643 -6754 pace ... help you remember more of what you learn ... give you years of quality use ... become a valuable source of reference material ... make your under- standing of electronics more complete ... and help you build your future today. Your future is too CABLE TV important to gamble with, so order your course in Release Universal Basic Electronics Today. NEW II Call Now ... ask about our other popular UCANDO DESCRAMBLER 7! videos in Digital, AM Radio, FM Radio, and Fiber Optics. These videos are currently being used by Advanced Performance: Tech -Schools, CET's, Military branches, Ham Color, Picture Quality and Stability Operators, Industries, and are sold in six foreign New PC Board Design countries. After you have seen your first UCANDO Latest Technolo Com ' onents video you will understand why UCANDO is FREE In -House Technical Support "Changing The Way The Universal II Kit 4000 $74.95 World Learns Electronics ". Includes our new silk- screened, etched, drilled A PC board plus the electronic components. Part 1 DC $44.95 Part 2AC $44.95 Kit Enclosure Pak 4000A $39.95 Part 3 Semiconductors $44.95 Includes custom enclosure, AC adaptor, nuts Part 4 Power Supplies $44.95 screws, knobs, momentary switch. 1 w Part 5 Amplifiers $44.95 1- 800 -664-6999 Part 6 Oscillators $44.95 No Florida Sales! SAVE ... buy all six for only $240 It is not the intent of The Halcyon Group to defraud any pay tv operator and we will not assist anyone in doing the Call toll free 1- 800 -678 -6113 same. Kits should be used for educational purposes only. 116 CIRCLE 136 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com Move into the 2000's with the Model 1010 12 MHz Synthesized Function Generator for only $289* The Model 1010 Synthesized function generator premises to take you into the next century by oombit.ing digital frequency synthesis with the traditional fundion generator. This instrument performs as three into a function generator. a sweep generator. and a pulse generator. Sine, square, pulse. triangle and ranga'.v...:s are synthesized with frequency accuracy regulated by an internal quartz reference (better than 2 parts per with option 1) sparming over 9 orders of magnitude ranging from .005 liz to 12 Mllz ( option 51. The c urpur. level can be varied over a range extending from 20 volts p-p to 16 my p-p. An independent DC otTset voltage _an be specified anywhere within this range. Bath external as well as internal synthesized sincwave mcululatio' sources are available for either .AM or FM modulation of a synthesized sinewave carrier. The model 1010 can he progranzned for either logarithmic or linear marker calibrated and triggered frequency sweeps. A hurst mode allows the user to specify the repetition rate and the number of pulses per burst An external trigger input all.nt s for synchronization of pulse or burst generation as well as sweeping. User programmable setups are stored in Functions: Sine, Square, Triangle. Pulse and Ramp nonvolatile memory for quids setup of repeated operations Frequency (for all functions) Frequency Range: .007 Hz to 12 MHz w/ opt -5 .005 Hz to 8 MHz w/o opt -5 Internal synthesized modulation source: Frequency Resolution: .005 Hz (.007 Hz w/ opt -5) frequency range: 1 Hz to 200 kHz Frequency accuracy: ± 25 ppm ( ±2 ppm w/ opt -1) frequency resolution: .005 Hz Pulse: Single, Burst, Neg. or Pos. External mod. freq. range (AM or FM): DC to 8 kHz Pulsewidth Range: 200 s to 125 ns FM modulation deviation range: 1 Hz to 200 KHz Pulse width resolution: 5 sec to < 1 ns AM modulation depth: 1% to 99% (consult factory) Output Characteristics Sine modes: CW, AM, FM, Sweep Voltage range: 16 mV to 20 Volts p-p no load) Square modes: CW, Sweep and Burst DC offset voltage range: -10 V to + 10 V (no load) Triangle modes: CW Input power requirements: 115 VAC under 20 watts Ramp modes: CW, Positive and Negative Options Opt 1 - ±2 ppm frequency stability - $60' Burst modes: Opt 2 - RS -232 Remote Operation - $50' Max number of cycles per burst: 1 to 65535 Opt 5 - 12 -MHz upper frequency limit - Sn/c Burst repetition rate range: .01 Hz to I MHz Don't be left behind... Take advantage of the special introductory price of $289* (no additional charge for units shipped with option 5). Move into the next Century. Visa, Mastercard, Amex, Discover. Videospectra, P.O. Box 755, Agoura, CA 91301 Call today: (800) 835 -8335. ' Limited tin-,e offer. REGIONAL FREQUENCY Low Cost CAD Software for the 113M PC and Compatibles DATABASE SYSTEMS Now In WindowsTM ON CDROM «a Design & Simulation PCB II. Layout Easy to use schematic entry program (SuperCAD) for circuit diagrams, only $149. Includes netlisting, bill of materials, extensive parts libraries, More Plus $5.00 S &H parts, and automatic wiring available in enhanced CAD package Data Access Program Included (SuperCAD +) for only $249. " New Data Easy Installation Powerful, event -driven digital simulator (SuperSIM) allows you to check logic To Use circuitry quickly before actually wiring it up. Works directly within the More Fields : Now 61 Easy SuperCAD editor from a pulkiown menu and displays results in "logic Many New Program Enhancements analyzer" display window. Starting at $149 this is the lowest cost simulator on New Format : Regional / Multi State the market. Support for PALs, a larger library, and a separate interactive logic Improved Performance / Faster Radius Search viewer are available in full- featured SuperSlM+ for only $399. Library parts include TTL, CMOS and ECL devices. Call for more information and pricing on our complete product !i Circuit board artwork editor and autorouter programs (SuperPCB), starting at Custom Databases and Services are also available ... $149. Produce high quality artwork directly on dot matrix or laser printers. You All frequencies within the FCC Master Frequency Database: can do boards up to 16 layers including surface mount. Includes Gerber and for the entire US on CDROM, Floppy Disk and Printouts Excellon file output. Autorouter accepts netlists and placement data directly from the SuperCAD schematic editor. to the FCC for Low cost combination packages with schematics and PCB design: 2 -layer for PerCon is the official contractor $399, 16-layer for $649. the Master Frequency Database on CDROM DOS version available. Write or call for free demo disks: PerCon Corporation MENTAL AUTOMATION...., 4906 Maple Springs / Ellery Road 5415 - 136th Place S.E. Bemus Point, NY 14712 Bellevue, WA 98006 (206) 641-2141 (716) 386 -6015 (716) 386 -6013 FAX 117 www.americanradiohistory.comAmericanRadioHistory.Com B & S SAL E S Call(313) 566 -7248 FAX (313) 566 -7258 24 hrs. Hours: Monday through Friday 8 am to 6 pm EST 51756 Van Dyke St. #330, Shelby Township, MI 48316 WE SPECIALIZE IN QUANTITY PRICING 5, 10, 20 LOTS Mahe 2/oat /3eú ?beal/ JERROLD SA PIONEER HAMLIN TOCOM ZENITH DRX -3 -DIC 8590 BA 6110 CR 6600 -3M 5507 VIP 1600 DPBB 8580 BA 5135 CR 6000 -3M 5503 VIP DPV -5,7 8570 8550 NEW PAN NEW PAN NEW PAN PIONEER SA -8500 SERIES JERROLD GREEN E LITE (BUT ALL BASE BAND) PINK PAN BA 5000 THE PREMIER BA 6000 SERIES PANASONIC TZ - PC 1453G2 By far the best basic converter on the market today. 550 MHz (1 to 99) parental control, sleep timer, remote batteries, contrast and remote control range. Superior to all other converters ist NO MICHIGAN SALES We are now offering a 6 -month warranty. In order for warranty to be in effect, this form must be signed and returned. FOR VCR, SECOND, THIRD, ETC. HOOK -UPS. Yes, I agree all units are to be used or resold in compliance with Federal and State laws. Signature Date Name Phone No. ( ) Address City State Zip It is not the intent of B & S Sales to defraud any pay television operator and we will not assist any company or individual in doing the same. J 118 CIRCLE 168 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com Coll o..l.a Tap into a World of... Construction YOU CAN WIND rCoea YOUR OWN COILS? FREE ELECTRICITY Our 150+ page Self-Reliance Catalog There's no trick to it except knowing what DC AC you are doing. In a unique, 106-page book IS JUST LOADED WITH to you can become expert in winding RF, IF. ENERGY INDEPENDENCE ... audio and power coils, chokes and trans- We offer: formers. Practically every type of coil is dis- Solar, Wind & Hydroelectric cussed and necessary calculations are given energy systems. True Sine with the mathematical data simplified for use by anyone. Get your Wave DC to AC Inverters. copy today! Electric Boat & Car kits. Portable power packs. Lighting & Cooling rlMail coupon to: Solar systems. Solar Pool Heaters. Electronics Technology Today, Inc. Solar Battery chargers. Solar P.O. Box 240 Massapequa Park, NY 11762 -0240 Books & Toys. DC Appliances. Active & Passive Solar Air & me my copy of Coil Design and Construction Manual Please send Water Heating Systems. (BP1 60). I enclose a check or money order for $8.45 to cover the Composting Toilets. Hydroponic, book's cost and shipping- and -handling expenses. NY state resi- Fish -Farming, Solarium & Green- dents must add local sales tax. house Systems. Water Testing, Name Treatment, & Pumping Systems. Emergency Food & H2O Kits. High Address Efficiency AC /DC Refrigeration + More... City State ZIP A LOT OF INFORMTION FOR ONLY $5.75 ... SEND CHECK or MO TO: All orders must be paid in U.S. funds only. Sorry, no orders ac- cepted outside of USA and Canada. Please allow 6 -8 weeks for de- Self-Reliance Company Inc. livery. P.O. Box 306, Florisssant, MO 63032 Sc':et4t9 (=C plaie .i[HCC % /a BUY WITH CONFIDENCE FROM XANDI YO NrlNDZ-_ SATISFACTION 30 -DAY REFUND POLICY ° -- - GUARANTEED! TECH SUPPORT NUMBER 201 E Southern # 205. Tempe AZ 85282 - 5140 (602- 894 -0992) Smallest FM transmitter anywhere! Smallest Phone transmitter Uses sensitive Transmit high quality stereo to any anywhere! microwave transistor amplifier. FM stereo receiver. Tunes 88 -108 MHz. *Tunes 88 -108 MHz. level *Covers 1 to 2,000 MHz. Built-in Output monitor Powerful 2 stage audio amplifier. No batteries required, for quick and easy tuning. line. *Compact hand held unit. Sensitive, picks up sounds powered by phone to 1/4 mile range. loud Ideal for use with personal at the level of a whisper. Up Includes miniature Attach to phone line speaker for audio indication CD player Up to 1 mile range. anywhere in house, even inside phone of detected signals FM STEREO TRANSMITTER SUPER-MINIATURE FM TRANSMITTER SUPER-MINIATUREPHONE TRANSMITTER SUPER SENSITIVE BUG DETECTOR Transmit full -bodied Hi Fi stereo to any FM stereo receiver. Worlds smallest FM transmitter. Use with any FM Worlds smallest FM phone transmitter Use with any When the XBD200 intercepts a signal in the 1 to 2,000 Separate left and right inputs and gain controls. Includes an broadcast receiver. Easy to assemble. all chip (SMT) FM broadcast receiver. Easy to assemble, all chip com- MHz range, it emits a growl that increases to a high output booster stage for greater range parts are pre -assembled to the circuit board. ponents are pre -assembled to the circuit board. pitched squeal as the signal strength increases XFS -CASE KIT 13.95 XST500 (E -Z) Kit $44.95 XSP250(E-Z)Kit $34.95 XBD200 C Kit $49.95 XFS108 C KIT $41.95 a Works with any FM broadcast receiver. Dial your phone from anywhere Transmits continuous beeping tone. Use with any FM broadcast receiver. and listen to the sounds Adjustable from Turns off when phone is not in use to Hear every sound in an inside your home. 88 to 108 MHz. extend battery life. entire house! Ad ustable from 88 to k Two digit Touch Tone v. Up to 1 mile range. Up to 1 mile range 108 MHz. code for secure operation. i 404. Works with any FM`_, Powerful 2 stage Up to 1 1, TELEPHONE SNOOP broadcast receiver. range. mile/ audio amplifier. The latest in home or office security Call home from any- TRACKING TRANSMITTER LONG RANGE PHONE TRANSMITTER MINIATURE FM TRANSMITTER where. aller a two digit security code, and hear the sounds in The XFM100 has a super sensitive microphone and is your home Automatically turro on without ringing eue phone Only 0.7 by 24 inches, the X1A100 operates at voltages of 3 Similar to our very popular XSP250. the XTT100 is battery level a whisper verifies sede, then activates for one and a half minutes. to 18 Volts and is ideal for use in locating lost model rockets, powered for greater range. It plugs into any phone jack and capable of picking up sounds at the of transmitting them to any FM broadcast receiver. XPS -CASE KIT $13.95 bicycles, automobiles. games of hide and seek, and contests. transmits both sides of conversations on that line and XPS10001C1RIT 9.95 XTR100 C Kit $33.95 XTT1001C) Kit 532,95 XFM100(C) Kit $32.95 Digital voice changing male to female, Works with most any scanner. Digital voice changing: male to fe- Uninterrupted coverage of 800 male, female to adult to child, child male, female to male, adult to to 950 MHz. 10 TO 1000 MHz. to adult. child, child to adult. Works with any scanner that 10 dB typical gain. Anonymity on any call. Use with any modular phone. can receive 400 to 550 MHz. 3 dB typical noise figure. Button for normal operation 16 levels of voice masking. 800-950 MHz SCANNER CONVERTER KIT 10 -1000 MHz AMPLIRER 16 levels of voice masking. r. Connects between handset and phone. If your scanner can receive 400 -550 MHz. ust add Designed to help scanners with poor sensitivity Pull in weak Includes OFF/BYPASS switch VOICE CHANGING TELEPHONE VOICE CHANGING ACCESSORY the XLC900 for gninterruoteg 800 -950 MHr cover- those signals. age. It converts all 800 -950 MHz signals down to 400- for returning to normal operation and front panel STOP THOSE ANNOYING TELEPHONE CALLS! Sound STOP THOSE ANNOYING TELEPHONE CALLS! Sound 550 MHz on your scanner can receive them! Add our gain control Add our custom case kit for that 'Pro- when you want to. Not a kit. Fully older and tougher when you want to. Not a kit. Fully older and tougher custom case kit for that 'Professional' look. fessional' look assembled. Single phone operation only. assembled. Use with single or multi -line phones. XLC-CASE KIT $13.95 XLA -CASE KIT 13.95 TRANSITION200(I $89.95 TRANSITION2001 $59.95 XLC900 C KIT $49.95 XIA1000 C KIT $24.95 TOLL FREE ORDER LINE SEND MAIL RAND/ ELECTRONICS WE ACCEPT VISA, MC, MO, COD ORDERS TO: BOX 25647 .1 HANDLING EXTRA 1.800- 336 -7389 SHIPPING TEMPE AZ 85285-5647 ASK FOR FREE CATALOG OF OUR PRODUCTS 119 CIRCLE 134 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com B 1.btNG BLOCK FOR `,OUR M CONTROL & MONITORI NG NET WORK SYSTEMS DINEX If you are not getting DISTRIBUTED Motion! INTELLIGENT this catalog you are NETWORK on some CONTROLLER missing out of the best deals in BY PLUGGING DINEX INTO YOUR PC. electronics today! We have thousands of RS -232 YOU CAN CONNECT ALMOST items ranging from unique, hard -to -find UNLIMITEDIIO. parts to standard production components. DIO- STD -SM $69 -95 Call, write, or fax today to start your free 5 TIt_ DIGITAL I/O subscription to the most unique catalog in ADi °C -SM $96.65 4 CHANNEL 8 BIT 0-5V A/D the industry, filled with super values on 1 CHANNEL FREQ INPUT surplus electronic and hobbyist type D- N1232 -51V1 $79.95 items. If you have a friend who would RS -2.32 TO 485 INTELLIGENT like to receive our catalog, send us their (route direct linear action with Muscle Wires - CC NVERTER they actually contract up to 5% when powered! LIMITED TIME name and address and we will gladly Use them in robots, planes, railroads - anywhere forward them a complementary 68 page I °JT RODUCT ORY OFFER: you need small, strong all -electric motion. catalog. $ 99.95(kit +Sill IQ &A1 Why pay more? Call today. What are Muscle Wires? \Cirr, ugi k processed P/N SM -KIT Including: \lu>ik :nr strands of a nickel -titanium alloy At DIC- STD- SM /ADFC-SM /D- M232 -SM, POWER called nittnol. rain ADAPTER, NETWORK PHONE LINE,SOFTWARE, temperature they are easily stretched be up to 5% of their length. When conducting an electric am- DEVICE DRIVER, AND UTILITY. OVER $450 VALUE. CI rent to they return their original -unstretched- ALSO AVAILABLE: shape with a force thousands of times their weight. .3 CH. 12BIT A /D, 12 BIT D/A STEPPER MOTOR 340 East First Street Fax Order Line SERVO DISPLAY, CODE INPUT, NETWORK Ohio 1- -6324 How strong are Muscle Wires? C17,ONIP OLLER...ETC. Dayton, 45404 800-344 ALS CONTACT FACTORY FOR DETAIL. This V;11-k- ,Ingle wire can lift from 35 to 930 grans (over 2 lbs)! For mow -O ORDO R CALL 15 DAYS MnrFY BAD, GtIARANIt£ e-'anACCm¢a th. ,eve wire, I/O CONTROLS CORPORATION VISA. WS" Order Toll -Free en a al in par.!II(I 1359 W. 'FOOTHILL BLVD, AZUSA, CA 91702 (818) 812 -5333 FAX: (818) 812 -5332 1- 800 -344 -4465 How fast can Muscle Wires activate? They contract as fast as they are Treated - as CIRCLE 169 ON FREE INFORMATION CARD quickly as 1,1000 of a second. To relax. the wire must cool again. Rates of many cycles per second are pos,ihle with :icrii e cnlin;. CABLE TV DESCRAMBLERS Flexinol Muscle Wire S.ecifications Best Prices in the U.S.A.!Guaranteed to Work! Wire Diameter ( /1m) 50 100 150 250 Resistance (S /1n) 510 150 50 20 Contract Force (grams) 35 150 330 930 WE WILL BEAT ANY PRICE! Typical Current (mA) 50 180 400 1000 How much power do Muscle Wires need? Power varies with wire diameter. length, and surrounding conditions. Once the wire has fully shortened. power should he reduced to prevent . overheating. 1 r f.' itrw) igi What are the advantages of Muscle Wires? -..!w_ gh I strength Io-vYeight ratio, pre,. se control. Al.. or l)C actiYation. Inn. life :Ind clireet linear anion and r MO JERROLD PANASONIC SCIENTIFIC ATLANTA PIONEER Get our new 128 page Muscle Wires Project Book with full plans for Boris and 14 other motorless motion projects, and our The Newest & the Latest Deluxe Sample Kit with one meter each of 50, 100 and 150 um dia. Muscle Wires - - Jerrold Impulse & series DIUITB -A all Starcom everything you need to get moving today! SA3 -DFA - all Sci. Atlantas incl. 8536/ +, 8580, Drop -field 24-hour Voice Order Line - VISA MasterCard PN -3A - all Pioneer systems `T ALSO FTB3, SA3, TZPC145G 800 - 374 -5764 1 Re FAST SHIPMENTS FREE CATALOG 30 DAY MONEY BACK GUARANTEE New Book & Mondo- tronics Deluxe Kit 1 -800 -772 -6244 M -F: 9 -6 EST only 524 San Anselmo Ave. #107 -62 U.S. Cable TV, Inc. Dept.: KPE084 San Anselmo, CA 94960 4100 N. Powerline Rd, Bldg. F -4 Pompano Beach FL 33073 $59.95 415- 455 Questions: -9330 Plus NO Fax 415- 455 -9333 $5.00 P &H FLORIDA SALES! CA orders 120 Internet: mondo @holonet.net odd tax International Orders Welcome! First Class P &H: $11.00 www.americanradiohistory.comAmericanRadioHistory.Com DC /CAD * THE BEST * introducing... 8085 MICROPROCESSOR THE TERMINATOR TRAINING SYSTEM Super High Density Router (Complete with Schematic & PCB EDITOR) JUST GOT BETTER Are you interested in Single Board Computers and Microprocessor based Features the following powerful algorithm & capability: systems? If the answer is yes and you want to know more about these fascinating subjects the PRIMER Trainer is the place to start. The PRIMER Rip - up and Retry teaches more and is easier to usa than other comparably priced trainers. The Pre- routing of SMT components over 100 page Self Instruction manual takes you from binary number Real -Time via minimization systems to processing interrupts. At the end of the manual are working examples of Real -Time clean up passes using photocells, User defined strategies temperature sensors, Window 3.0 capability as DOS Task making a waveform 1 -mil Autoplacer and Autopanning generator, programmable timer with alarm, and a new Two-way Getbv - and DXF motor speed control lab using Automatic Ground Plane w/ Cross -Hatching a back EME The PRIMER Complete w/ Schematic & Dolly Libraries comes with everything you need Optional simulation capability & protected mode for 386 users to start programming in machine language. Continue on to program in Assembler, Forth or BASIC with optional upgrade and software. Upgrade *PCB LAYOUT SERVICE AT LOW COST * includes: RS232 serial port, a serial cable and, 32K of battery backed RAM. LEASE PROGRAM & SITE LICENSE AVAILABLE THE PRIMER IS ONLY $119.95 QUANTITY 1 IN KIT FORM. THE PRIMER ASSEMBLED & TESTED BY EMAC IS $169.95. ORDER NOW AND RECEIVE ONE FREE POWER SUPPLY WHEN YOU MENTION THIS AD. PLEASE ADD $5.00 FOR SHIPPING. Design Computation flàc, inc. 1771 State Highwa 34 618- 529 -4525 FAX: 457 -0110 BBS: 529 -5708 armine J 7 (9081 681F- 770Q- f9Ò81 6 1 - 8733 (FAX1 P.O.BOX 2042 CARBONDALE, IL 62902 - DC/CAD ... The focal point cffauta CAD market ' DATA ACQUISITION A A A A A A A f 'M.I+AV,ANNM,.IYWv,»'J.u.n+n'MMn4'. e -ió 12 Bit 8 Channel Analog to Digital Converter + I/O Specifications: IBM 486, 386, 286, 8088 PC compatible interface board. 12 Bit 8 Channel multiplexed Analog to Ditigal Converter. Input Voltage 0 to 2 volts (data 0 to 4095) .00048 volts per count. 12 Bit conversion time is less than 1ms. Accuracy is better than +/- 2 counts Linearity better than +/- 1 %. Over Voltage, the counter is a 15 bit counter and this board will handle twice the normal input voltage. MODS: This board can be modified to convert 8 bits to 14 bits. This board also has one 8 bit TTL output port and one 8 bit TTL input port. All I/O is through a 37 pin D connector. A Disk with BASIC programs is included. Programs include a low frequency Oscilloscope, Data logger, Temperature measurement using a Radio Shack Thermistor and Voltage measurement. This board also has mounting holes for a Prototype board to be added. Order Part Number 93 -326A $149.95 + Shipping ($6.00 for 2 day air or $4.00 for 8 day ground) Circle my number on the FREE INFORMATION CARD to get more info on my other Interface Boards. John Bell - 1381 Saratoga Street - Minden, NV 89423 - (702) 267 -2704 121 CIRCLE 137 ON FRIEE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com STOPPING METERS reports. ' 'ow o- Bv vices can slow down - even atop - wal hou meters - rj1()` while loads draw lull r! Device simply plugs into de- fI1 one outlet and normal loads Into other outlets Aso S1 1 scribes meter creep. overload droop, etc. Plans $28 ;,ri to ( External magnetic ways (appfed JPINetyitaii .w F,D. MANUAL! the meter Itself) to slow down and stop watthour meters C O N 53 U M E R T R O N I C ß while drawIrliolw loads. Plans. 519. /OEM 2011 Crescent Dr., pp pp Drawer 537 meters work calibration, NM 88310 Ml7ER ^uw watthour Alamogordo, error modes (many), ANSI Standards, etc. Demand and Voice; (505) 434.0234 434-1778; Polyphase Meters. Expertmental results to slow and - 8PM'MST, Mon -Sa 8AM sto. meters b others. 11. M 2, $31 All 3 $59 434.0234 (orders only; K you pet FREE 1994 Catalog Eaa; (5081 TELLER MACHINES answering macnine, any time2enhóú AUTOMATIC 111, ask AT er mes, abuses, rulnerablllt es . e eats es- Include: Physical, Reg. Pima Tech BuppoIS (must relate drecly 10 rig posed! 1004- methods detailed, and Thur.. only. E, card counterfeiting, mag- Purpose order or prospective order): Tues. cipher, PIN compromise, of General Van Eck. Crystals TEMPEST, tapping, false front. Add $5 total S41 (US, Canada). All Items In stock. VISA. netic stripe, -cod, vibration, pulse. high MCard OK ($29 min.. No CODs or bill mes. New Cata- spooling, Inside lob, super law, leg (150+ offers) is $2 W'order, $4 wb (uoiree-Lalals91. voltage others. Case histories, countermeasures, photos, Ilg- Now Available Inkiness since 5971. As seen on TV, etc. John mourns- for- detailed security checklist, labeled Internal mer Lockheed Seder Engineer, 10450 Computer Science Pm- ores. ATMs contain up to $250,000 in cash' Recent Imam. Navy, Air Force Weapons Engineer. NIH Health Physicist S350 000 ATM crime s. e stl9 unsolved! $39. AII seftwar. sup ort. an IBM -PC cons- CARD SCAMS Obis sae s stem. Nose Pentium. CREDIT Cardholders, merchants, '.nks sutler :I Mons In OffTheShelf HARDWARE losses annualty because of credit card descaims. FOR FREQUENCY CONTROL: Van Ec Systems, Automated Tempest Module, aX Ra- means d Credit card fraud and scams. dar Emitter, Carlacking Follar, Personal Body Alarm, P leotwn FUNDAMENTAL MODE CRYSTALS Voice Disguiser, Hearing Asslstor, Shriek Module, EM Countermeasure, Omnimax TENS, 6th Sense Communl- CONS & SCAMS 1.001 -30.0 MHz FROM $11.00 I I :l mn per catty, many nifty Phone Boles, Bumper Beeper, Sub- 0ns scams eece mencans o HC6 /U, HC33 /U HOLDERS liminal Miser/Amp, Super MWO, Rife Device. Heuro- year) The most comprehensive survival manual or cons -tech. De- phone, Hieronymus Machine, Magnetometer. Data Card 6 scams of all kinds - from the classic to hi Reader/Writers, Dwelling Security System. Levltator. tails on 100s and their many varLations. Protect your- FUNDAMENTAL MODE CRYSTALS Vortex Generator. Ultrasonic Jammer 6 Receiver. sell! $29. Cancellation System, MHz FROM Long-Range Eavesdropper, Noise HIGH VOLTAGE DEVICES 2.0 -30.0 $11.00 Unknown Presence Balloter, Electronic Dowser, Auto- 11V .ev es ens: tun n , 'laser, Pro , mark Pet feeder Stealth Paint morel See our C HC25 /U, HC18 /U MINIATURE Flasher, Blaster, Zapper, Audtn'RP Radar Jammer, MODIFICATIONS F. Van de Greiff Gem, Fence HOLDERS CELLPHONE Jacob's Ladder, Plasma ee our Catalog or our in emus coop one ma.r lca on Charger, Geiger Counter, Ozone Gen., fish Sooner, all makes - olds ($69) - detailed. comprehensive, covers Plant Stirn., Atollan, morel Shock) 1 $29. 'guides"). ((Do S . THIRD MODE CRYSTALS to times more Into than competitor's ATTACK! w for o, -to -date hardware4ottware . UNDER c W Pro ects belo actrone "capon 18 -75. MHz FROM $11.00 ectromagne C me creme an. SPECIAL PROJECTS Attacks cause: Cancer, birth defects, and profound psy- a n an. -or consu t ANY HOLDER "e esi 9 n, .ul ., rep r, mo. y, main chological, neurological, cardiovascular and Immune project - electrical, on any device, system, process or syYstem disorders! Destructive to people, animals, electronic, computer, phone, mechanical, optical, auto - p'ants, equipment! Includes ACILALCASESOEFM-AL- FFTH MODE CRYSTALS motive. Invention protoryping. Confidentiality guaranteed. UCëiM_PEOPIL (we Investigated)! Includes how to lee not Describe and Include 525 pre engineering (does verily and pinpoint EMI and electronic attack sources, 52 -125. MHz FROM $13.00 in 7 -10 da s. obll.ate ou . Time and cost estimates and specific countermeasures. $29. EM_BRA1N ANY HOLDER VOICE MAIL HACKING BLASTER! Tutorial and plans for pcwedul and LAS DEVICES. an, t e ELECTROMAGNETIC WEAPONS 'ow ' Cs ' a :ex ' ' sys ems are use, Optimum ctrcufs, (regs, waveforms, duly cycles. Inten- specific ways they are hacked. Includes ASPEN, MES- SEVENTH MODE CRYSTALS sities. Thorou.h. $29. Both 519. SAGE CENTER, NIX, GENESIS, EZ, SYDNEY, PHONE 110.5 -150. MHz FROM $18.00 MAIL, AUDIX, CINDY, CENTAGRAM, SPERRY LINK RADIONICS MANUAL and RSVP, etc. Absolutely required for all users, sysops crung erect: c. , e ecuon an, e ectromagnebc there - ANY HOLDER secud .- rsonnell $29. peutic, diagnostic and preventive devices (mossy ex- PBX HACKING perimentall. History, descriptions, plans (dozens) avail- . . - , i , . 4. abilities of Redlanlcs Devices from early to modem. White 'VOICE MAIL HACKING' details how VMSs are While drugs cost S Hundreds. electricity costs pennlest Quantity Prices Available hacked lar'phun and profit - Including VMS methods S29. HEAL THYSELF: Plans for 3 major elec- lor hacking PBXs themselves - 'PBX HACKING* ad- rronlc therapeutic devices of types approved by FDA. dresses ALL Issues relating to PBX hacking, Including $19. Both $39. On Request countermeasures' Can your business or agency afford a HARD DRIVE MANUAL $90,000 phone fraud loss (the average loss due to Coven all an drive an controller knolemen'ations hacked P005 7 As described In Forbes Ma ulna. $39 (emphasis on PCs). How to selecL Interface, Initialize, FOR MICROPROCESSORS: PHREAKING CALLER ID & ANI set up, use, maintain troubleshoot and repair them. Delal s on w they wo an. dozens o e ecl ways How to protect them from mistakes, sabotage, prying ...low E.S.R....close tolerance...long -term stability... of defeating Caller ID, ANI, 69, '57, and Cal Blocking eyes and sticky fingers. How to recover damaged and and '67. Also descdbes Caller ID, Orange, Belge, lost files. How to prevent crashes. Includes software re- frequency deviation from 0° to 70°C max. ± 100 PPM... Cheese and CF Boxes. ESS, SS7, E-911, various views. Loaded with information, advice, Ups. $29. CLASS services, CNP, NON PUB DA. CAMA, DNR, DISK SERVICE MANUAL Maintain, trouble - tolerance at 25° ± 50 PPM. 800-ECR, Diverters, ID Extender, Centre( - more $29. shoot, repair, adjust, align floppies without special equipment or software. 3.575.254', PC/X'95/386, PHONE COLOR BOXES Apple, Commodore, etc systems. All floppies need rea .oxen 489, nee. one D c. or occasional upkeep. $29. DISK DRIVE TUTO. HC49 /U described. Dozens of circuits, simulator programs. Plus 816L Theory, practical lads on floppy drives, disks, call- lorwardinp, cenlerenci hp, phreak history, 50 useful including many bps, recommendations, formatting, (n- 3.0 -3.5 MHz $5.00 and le. al .hone circuit .fans - more. $29. ledacin. FOC etc. $24. An 2 $49. All 3 859. 3.5- 18.432 MHz $5.00 ROBOFONE AUTODIALER SOFTWARE PROTECTION SYSTEM 'owe u, versa e, menu -.r en 'argyames auto.'- 19.6608 -24. MHz $5.00 Inique system that p .iscourages cos S. are aloe lets you dial any quantity (up to 10K) or mil of lo- piracy while rat Intededng with legit archival copies. No calking distance numbers In any order, over any length 'mown way to defeat. No special equipment required. of tine, whether busy or answered (your When Ordering Please MP- choice) and Simple and automatic to install on your distributed soft- Specify Crystal log the times, commands and results to monitor, printer ware. Compatible with ail copy -prevention systems. and-or disk. Quick -dial directory of up to 600 numbers. Manual + Disk' 859. BUSY redlal options. Direct modem command and con- trol. All Result Codes, Including VOICE and RINGING. STEALTH TECHNOLOGY Optional shell to terminal pro.ram upon CONNECT. Ezell o ice m.ar s asana ng ' a so as error ra es . I - %1 - to menu or DOS for batchin' . Manual + Disk' $29. 20 Every known error mode stealth method and ma- tedal used to minimize radar reflections - tacti; and COMPUTER PHREAKING strategy to fight unjust radar tickets (that cost you , -. O I I ". Your reliable source for a etc. an. $100s In Insurance and risk cancellation) methods to countermeasures. Includes with of hacker disk 360K detect and am 01.nals - fu described' $29. text files and utilities, and legendary FLUSHOT+ protec- lion system (Editor Choice, PC Magazine). Dozens of SECRET &SURVIVAL RADIO world of crystal clear communication computer crime and abuse methods and countemea- Iptlmum sorvrva an. seco rails equiparen me - stns. How systems are penetrated. BBS advice, ass- oils. treq allocations and vokedata scrambingbncod- wad defeats, glossary . much morel Manuals + ing. Includes small recelversdansmlhers, telemetry, an- Disks' $39. tenna optimizations, remote mon1odng and control, se- curly, surveltance, and ultrasonic, fiber -optic and Infra- BEYOND VAN ECK PHREAKING red commo. 70+ circuit lans, tables. $29. ayes.ropping on ' an. compu er n'eo signa s using an ordinary N! Includes security Industry reports. Range ' Order Toll-Free n a e up to 1 KM. Plans Include both the Consumertronlcs and erpa arasse or use an pu e the original Top Secret Van Eck des ins! $29. Taken tor granted? Stuck In a dead -end bb? Can't find a good lob? Expect to be laid off, fired or transferred 1. 800 -JAN-XTAL CRYPTANALYSIS TECHNIQUES soon? The ultimate no- holds looking- -R1 r -barred, after we powe umenu -.rnen tryDto programs in , r MachlaveMan techniques obtain, and their .BAS sources) to analyze, decrypt 'secure' cl- pay nd benefits. THE RULES OF THE phertexts. Worked -out examples. Recommended In pros- FAX ORDERS: 1-813-936-3750 GAME FOR A WITHOUT RULES! From first re- ous'Corn tilers Securi . Manual +Disk' I $29. sume to CEO. $29. EXPEDITED ORDER SERVICE AVAILABLE B an ORDER of the MAGNITUDE ROCKET'S RED GLARE e most compre enure, ar'- Itinp -Sec cur- .ow to cope an. .0 s.I. -grope an amaeU . . rival book ever written! Topics include WRITE FOR FREE CATALOG electronics, survival rockets. Emphasis on formulation, manufa;ture, VIA CALL OR computers, energy, weapons, concealment, revenge, Installation of propellants, motors, Igniters, etc. Includes alarms, etc to survive today's dangerous world. We all P.O. Ft. Myers, FL 33906 JAN list of commonly available materials, and the design of Box 60017 lace Increasingly financially and brutal times! physically launch pads and test beds and their electronics. $29. .r,". 7:1 Fletd. expedient use of technology in various Unreal and P. -... oraar Tnd.yl 0001 434-0 34 122 PRICES SUBJECT TO CHANGE WITHOUT NOTICE conflict environments and scenarlas. 549. ...e r...e....s..,.i -.,,p...... x. CIRCLE 37 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com NW ELECTRONIC /ELECTRICAL TEST ACCESSORIES /4:** Circuit Test Strips & Panels Let You Test Circuits First. Pomona test strips and panels are the easy way to test electronic cir- cuits before you build them. Our Simply plug it into Circuit Test Strips are rated for over any scope with a bandwidth of 5MHz 25,000 insertions. Maximum current or Higher, 200mV/di . is 1A, contact resistance <10142 , or better sensitivity, with a 10pF capacity between and external trigger- ing, rising edge (+) contact points. Circuit Test Panels capabllity..20MHz feature six Circuit Test Strips for ri bandwidth covers larger bread board tests, providing test points. most miaocontroller 3,330 frequencies. An Accessory Kit is available to replace damaged contact points/buses. 6037 Circuit Test Strip $ 9.50 ea. 6038 Circuit Test Panel $65.00 6039 Accessory Kit $15.00 'turn Your Scope Into A Digital Analyzer. Great Test Lead Kits Pomona's pocket -sized Logic Scope Probe features three modes: logic analyzer, trigger probe and MUX. Kit includes Logic Scope For Fluke & Other Probe,ll test leads with Micrograbbers test clips packaged in a reusable blister box that fits into your tool box or scope case. DMMs. 6004 Logic Scope Probe Kit $330.00 They're the ideal replace- ments for Fluke, Wavetek If You Use A Scope, (Beckman), B&K, Amprobe These Quality Probes Will and most DMM test lead sets. Each kit features the right Make A Difference. combination of accessories to Selecting the right scope probe can be as meet your specific test important as selecting the scope itself requirements. And several of because signal accuracy is only as good as our probes and kits are the link between your Tek, B&K or Hitachi designed to meet IEC1010 specifications for scope and the item you're testing. Pomona your assurance of safer operation. scope probes give you faster rise times for sharper wave froms, and lower impedance Desalploq è of KB Pad Ale. Price for cleaner signals. &meal the Tat Lad We 2 each: Probe Mordfes, Ripp Mole to 5111 KIM Slrai¢t Peu Test Lois, Fleable I d eifre` Test Clips and M dim 100 MHz Mandan' Modular These low -cast woddlasea offer 200 M & Prolusion! Mad9blor Alligators, on daze and one red. exce,._ I aoenuton kin crag convertors] scope uses (up to 100 MHz). Excellent performance á aradais0cs and tits include: sealed insullsd probe, 12 meter cable assembly, insulated bit attenuation ranges (rcldnding x100 MOW Tat Lead Kr 2 each: Probe Handles, I8 d Mlle b 5100 37.10 alligator dip , ' rig lead trimmer tool (ea* Model 5792), sprung and matchable x1txl0). Probe lot con- Straigd Pip Test Leads & Medprrabbe Gdp Clips, one bk and one red r< hook BNC . , gold piled beryllium copper tip, stainless steel tip, tains same accessories as 100A4tr I01. Beim Beall Meter DIVA 10r 2 each: Probe Hardies, Straight to 5801 21.10 IC tip, insulating 8p and a reusable plastic case. StrUght Plug Test leads, Reale Tag Clips & Medkrn Pad AIM Cade Input breaddca BW Rhetlme Max Ceci ermtla Pria Alligators am black & MPat No. 1.41MIN (m) MNVM C(PP) (M&) (esse) m Rs (439 Badman Lab Tad 101Swräeble x1- x10(lazilloempe Robe with 1005 92.00 5712 x1 12 Same as scope 45 20 15 600 31.58 kit ix Eiereros (5543A), Oscilloscope Grand 5795 x10 12 10 15 100 3 600 10-60 35.00 LAC aid Doubie Banana 45506 xl -x10 1.2 ?LXlC z1 x10 AID 21A0 600 10-60 43.00 Mulll-ese KB for Elubanles 2 each: Probe Handles, Pop Jade Leads, 5543A 3410 Swilchable Same 10 55 16 15 100 35 3 one black & me red.1 each: Medium Alligator, Spade Lug, Miniprdbber' as scope Lead & Extended Slide -on Tip. 12 Same as scope 45 30 10 600 - 41.00 5800 xl Delon MI Mr Eheboanpies 2 each: Probe handles, Medium Alligators, 5874* 5110 5883 x10 12 10 15 200 1.8 600 10-60 45.00 Minkratte Lest, 5806 xl -x10 12 Wag ALA) stall) á1M4 600 10-60 40.00 E & Pop,W.rads, roe black && am & 2 Spade Ups same as 55 15.5 20 200 10 1.8 Switchable Mad-1012 each Extendable Tlp Probe Leads, Replaceable 5877A 79.90 as salpe rip Probe Handles, . Jack Leads, Couplers, Medium Alligators, 5827 x100 12 100 6.5 200 1.6 1200 15-50 80.58 Heavy qty Aerators, Leads, Minipirser Leads, & SLOE- n IC Tips one dado & one and 2 each Spade Lugs, Clog Leg Mips Tips, Get ITT Pomona's 1994 New NeA rips, Shouldered Micro Tips & 4 Std Brass Tips. IEC1010 safety designed nodels Products Catalog. FREE! Find hundreds of new probes, test The fastest, easiest way to order any of the products fea- tlYlosletCord leads, clips, kits and accessories for keep- tured here is to visit your nearest Pomona Distributor. If ing pace with the latest technology. To you already have our 1994 Catalog, you'll find these and order your free catalog, visit your nearest VISA thousands of other test accessory products immediately write or call us IJ Pomona Distributor, [Plum available. Or, you can charge purchases on your VISA, direct at (909) 469 -2900 MasterCard or American Express credit card by phoning, toll free, 1-800 -11T-POMONA (credit card orders only). ITT Pomona Electronics 1500 E. Ninth Street Pomona, CA 91766 -3835 ITT Pomona Electronics (909) 469 -2900 FAX (909) 629 -3317 AN ITT CANNON COMPANY 123 CIRCLE 139 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com CABLE TV DESCRAMBLER KITS "New & Improved Version" Universal Descrambler Tri -Mode Descrambler SB -3 Descrambler Includes all the parts and an Includes all the parts and an Includes all the parts & an etched & Drilled PC Board. Not etched & drilled PC board & etched & drilled PC board included is AC adaptor or AC adaptor. Not included is & AC adaptor. Not included enclosure $69.00 the enclosure $49.00 is the enclosure $39.00 Call Toll Free 1- 800 - 886 -8699 Visa, MasterCard & COD. M & G Electronics, Inc. 2 Aborn Street, Providence, RI. 02903 It is not the intent of M & G Electronics, Inc. to assist any individual to defraud any pay TV operator or to violate any state or federal laws regarding the use of the descrambler kits. You must understand the kits being purchased for educational and or experimental use only. FREE construction plans for any of these kits WeederTechnologies Call 513- 752 -0279 PO Box 421, Batavia, 011 45103 Educational Kits for the Serious Hobbyist Caller Block Telephone Caller ID Telephone Call Restrictor 50 MHz Frequency Counter Connects between your telephone Connects to telephone wall jack. Connects to telephone wall jack. Disables Reads frequency from 1 Hz to 50MHz and and its wall jack, and prevents the Shows the telephone number of all phones on the line if attempting to displays it on a 16x1 character LCD phone from ringing unless the the calling party along with the either: dial a number that has been stored display. Auto -range feature provides calling party is one which you've time of day the call was received, in memory 'Block Mode' or, dial a number floating decimal point and automatically entered into memory using your on a 16x1 character LCD display. that has not been stored in memory 'Allow affixes the correct suffix (Hz, KHz, or MHz). touch -tone phone Your answering Stores the into from the last five Mode'. Use touch -tone phone to enter Microcontroller based, very few additional machine can handle all other calls. calls in memory. Complete stand telephone numbers into memory, and components. Change between two seporate alone, no computer interface choose mode. Program from any phone directories of callers with a simple needed on the line using your password. flip of a switch. Vocal /Effects Mixer Vocal Filter Telephone Scrambler Electronic Message Module An audio device which hooks up to An audio device which can be the 'tape monitor jacks of any Scrambles your voice before Use a set of four pushbutton switches to used with a home component home component stereo, and sending It over the telephone write and store your own personal message stereo system, to filter out the allows you to mix your own voice line, and descrambles it on the in a e -pin non -volatile EEPROM, which can main vocal sound track from with the program source (CD, tape, other end. Connects between then be printed across a 16x1 LCD display. standard stereo recordings (CD, record, FM, etc.) as its being your telephone and wall jack. No Message can be up to 240 characters long. tape, record or FM), leaving the played through your stereo. modifications are required to EEPROM can be removed from socket and background music to sing along Features Bass, Treble, and Reverb your telephone. Full duplex still retain message. Re- program over and with. Produce your own karaoke controls for your voice. Great for operation. over with new messages. tapes. having your own karaoke party. PELLULAR SOFTWARE 450 MHz SPECTRUM ANALYZER - Program ESN & NAM info on Adapted from Nov. '85 OST article by Al Hedrick K2BLA New Cell Phones Don't be fooled by software that only programs old phones. You don't have NI 1 to open the phone. Guaranteed ! The National MOTOROLA ABOVE 9122 Arbor Day Foundation Features: Three digit LEDe' center frequency readout. Technophone, 12 position calibrated scan width 1 KHz to 50 MHz. Panasonic, NEC, switchabie bandwidth; wide - 300 KHz, narrow = 15 96,000 acres of irreplaceable Diamondtel /Mitsubishi, Nokia KHz. Use your low frequency scope for the display rain forest are being burned Switchable 10 KHz video tiller: Variable IF at Other makes & models Available tenuator. LOG output calibrated in 10 db steps. every day. join The National Complete Kit Only $459.95 Arbor Day Foundation and sup- ESN Reader kit coming soon ! Assembled & Tested $799.95 port Rain Forest Rescue to help Software prices from $395.00 CA Residents add 7.75% sales tax. S &H: $7.50 stop the destruction. Call now (insured). Foreign orders add 20%. For more info or Sold for Educational Purposes only price list: send LSASE (52 «l to: Call Rain Forest Rescue NOW. 609 -751 -2242 A &A Engineering 2521 W. LaPalma #K Anaheim, CA 92801 714.952 2114 1- 800 -255 -5500 124 www.americanradiohistory.comAmericanRadioHistory.Com CONTROL ANYTHING FROM YOUR Learn MICROCONTROLLERS COMPUTER SERIAL PORT! and EMBEDDED SYSTEMS 115200 BAUDS SMART BOARDS DO NOT REQUIRE PROGRAMMING! The I/O -232 boards understand simple with the AES -10 ` commands, e.g. PRA [Enter] reads Port A. Results are sent The ALS -10... a complete learning a v °' ` back to the computer as an ASCII string allowing the use of system, a complete embedded fs,,' . PROCOMM, MAC240, or your own S t programs. In addition to control system.Extensive manuals á1'1r A interfacing the I/O -232 boards have the following embedded guide you through your 8051 +ev,avi4E4, i functions: development project. Assembly, All standard Baud rates a BASIC, and C programming. All hardware details, (300- 115KB) supported. complete schematics. Learn to program the LCD, Bin, Hex or Dec formats. keypad, digital and analog 1 /Os for your applications. 241/0 lines configurable individually as Inputs or latched Outputs. 32K ROM , 32K RAM 8 or 10 bits, 10 channels ` ` ' ' ` ' 2 by 16 Liquid Crystal Display Analog to Digital converse. 4 by 5 Keypad 10- 10,000 Hz, 0- 100% Pulse Width Mod elation output Digital, A/D , D/A, and PWM, 1/O 3 EASY to use stepper Built in Logic Probe motor logic intefaces (Muxable to more). Power supply, (can also be battery operated) Relative resistance or capacitance measLrements using an RC network (ideal Extended AES BASIC and AES Monitor in ROM to read temperatures using a thermistor). Built -in routines for LCD, Keypad, I /0- 232 -8A ( 8 bit ADC) Assemb. A/D, D/A and Digital I/O ports Only USS109 See 80C32 registers while you Step I /0- 232 -8K ( 8 bit ADC) Kit. Only USS 89 See all memory locations and data on LCD 1 /0- 232 -10A (10 bit ADC) Assemb. See memory contents in dec. hex. and binary Only US$125 RS -232 cable to connect to PC for programming I /0- 232 -10K (10 bit ADC) Kit. Only USS 99 8051/52 DOS Cross Assembler Add $10 for manuals + Program disks with well documented examples Shipp ing & Handling User's Manual, Language Manual, and Text ITC MICROCOMPONENTS INC. $365 , Money Back Guarantee Free Brochure, M/C Visa 18440 -57 Ave, Edmonton AB, T6M 1Y2, 800 - 730 -3232 aEs Canada. 1 tD21=2:=E=1 714 - 74 -0981 Phone & Fax: (403) 486 2377 1407 North Batavia Street, Orange, California 92667, USA Fax 714 - 744-2693 .._..,.. _.. EASY /101FABRNCATE ALL ITEMS STOCKED DESIGNED FOR SMALL LOT PRODUCTION SHEET METAL BOXES FOR CONSTRUCTION FOR QUICK DELIVERY I PANELS ARE .060' B PANELS ARE .063' ALUMINUM PANELS ARE .083' ALUMINUM ALUMINUM AND ARE FIELD REMOVABLE RACK CHASSIS HEAVY DUTY MODEL DESCRIPTION PRICE RACK CHASSIS wxDaH(nOH4) I I605 19xSx1.75 30.65 x x MODEL DESCRIPTION PRICE w xi) xHlncn«I 1 R U 7 19 a 7 a 1.75 33.10 6x3x2 18.75 S DUAL SLOPE 1RU10 19x 10r 1.75 35.25 Sx3a2 20.95 30117 19x 7 x 5.25 115.00 METAL CABINETS 20U5 19x6x3.5 33.10 4x4x3 18.75 3RU 1 C HO 19 a 10 a 5.25 121 .00 2RU7 19 x 7 x 3.5 3526 6 x 4 x 3 20.95 3RU14HD 194149 6.25 134.00 411074-10 MCOE.L DE scnipnoti Pare 2RU10 19x10x3.5 37.50 x4x3 23.15 19x 7 a 7.0 121.00 4RU1CHD 7.0 EWCR DM. SE =MARY 01M. E 3RU5 195 6a6.25 41.90 4x7 a4 20.95 19x 10x 129.00 3RU7 19 x 7 a 5.25 44.10 6x7 a4 23.15 1RU16HD 19x 14x 7.0 174.00 1 N0 7 DS 4a ex 4x 12x 1.9a 24x le 69.00 3RU 10 19 x 10 x 5.25 46.30 8x7x4 26.76 51907 19 9 0 9.75 126.00 DS2 ex 6x 4 %12x19=24: 1.6 63.25 5RU10HD 19x /0x 6.75 133.00 DS -3 exila 4x 12x 19x24: 1.6 67.50 5RU14HD 10x14a9.75 143.00 DS4 10a 6 x4 x 12 1.9a2.4 x1.6 71.50 SHEET METAL PUNCIIES DS -5 12x 6 x 4a 12x 1.9a 2Áa1.6 7600 11100EL MOIS MM 8 MIME P $610.00 -6 HAND TOOLS 05 18x6a4a 12a 19a2.4x1.6 61.00 PUNCH I 351' ROUND 295 PUNCH (shipped within Ds -7 exila 6 a 2: 3.1x 35x19 6900 2 7/16' ROUND 295 I105EL 0E601PTION AA60E (sa4 PACE PUNCH I Ds -S 6aSa6x2a3.1x3.5111.9 7300 3 1/2. ROUND 9.95 48 states) MD.1 MICRO REAMER 1.055 1650 PUNCH 4 9/18' ROUND D59 Saba 62143.1a3.5x1.9 12.95 MD.2 REGULAR REAMER 3.0.12.0 2600 76.00 PUNCH 518' ROUND 1225 DS 10 MD -3 LARGE REAMER 10.0.25.0 4600 10x Saba 2x 3.1x 3.5a 1.0 52.75 PUNCH 8 11/18' ROUND 12.95 RT -1 05.11 12x Sa 6x 2x 3.1x 3.5x19 87.75 PUNCH 7 3/4. ROUND 1295 RETHREADER 30x 0.5 10.50 AD -1 st 4OaPlER FOR POWERS22VO41I4ER 0512 lea a 6x 2x 3.1x 3.5x 19 100.75 PUNCH 8 13/18' ROUND 12.95 C.I.I. 8.50 PUNCH 9 7/8' ROUND 1295 PUNCH 10 1' ROUND 1395 PUNCH 11 11/16' ROUND 13.95 NEW FOR 1994 EXTRUDED SERIES PUNCH 12 1.1/9' ROUND 1295 PUNCH 13 13/16' ROUND 13.95 RACKEM 7NSLACKEM' SERIES PUNCH MODEL DESCRIPTION PRICE Il 1.1/4' ROUND 14.95 A NEW 'A RACK SYSTEM WITH ITS wa DHlnQie41 PUNCH 15 1.3/8' ROUND 14.85 PUNCH 18 1.1/7 ROUND 18.95 OWN TABLE -TOP RACK ET-1 4.52 x 4.35 1.57 10.00 PUNCH 17 1.5/8' ROUND 21.95 AVAILABLE IN CLEAR, BLACK AND ET-16 4.52 x 4.35 x 1.57 10.00 PUNCH 19 1 -3/4' ROUND 24.95 ET-2 4.52 x 6.00 a 1.57 24.00 PUNCH 19 2.5/8' ROUND 81.95 BRAKE & SHEAR ODLD FOR A GREAT PRESENTATION ET 20 4.52 a 6.00 a 1.57 24.00 PUNCH 20 I1 /16. SQUARE 3295 PUNCH CCET PLASTIC CARRYING CASE 18.00 21 3/4' SQUARE 3825 CUTS METALS, PLASTC, ETC. TO UW' THICK AND ORDERS (800) 634 -3457 PUNCH 22 I' SQUARE 48.95 77/5'1MDE AND BENOSUPTO 90'. GREAT SHOP -DOL. PUNCH 23 21/32 x 15/18' RECT. 48.95 FAX ORDERS (800) 551 -2749 PUNCH 24 THURST RACES 10.95 TECH LINE (702) 565 -3993 M - Tn 8 am TO 4 pm (Pacific Time) SESCOM, INC. Line will only be answered by our technicien, it Po answer, please by at aneths. 6me 2100 WARD DRIVE CALL OR WRITE FOR YOUR FREE24 PAGE CONSTRUCTORS CATALOGI OFFICE (702) 565.3400 HENDERSON, NV 89015 USA 1yfl PREPAID ORDERS SHIPPED GROUND AT NO CHARGE (48 STATES) FAX (702) 5854828 125 CIRCLE 48 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com Versatile DMM w/ Capacitance Large LCD Display DCV accuracy 0.5% Diode test, continuity check with EARN buzzer sound Transistor hFE test All ranges overload protected Rugged case, drop proof Capacitance measurement 1pF -20pF in 5 ranges Resistance measurement up to 200M MORE Auto power off Yellow Case 1 Year Warranty Reg. $54.95 Sale $42.00* MONEY! Item # Z3910 Model Close Out Reg. $59.95 Be an FCC Sale $24.00* Item # Z3800 Full Range DMM 5 DCV ranges x0.5% LICENSED 5 ACV ranges ±0.8% 7 DCA ranges ±0.5% 7 ACA ranges ±1% ELECTRONIC TECHNICIAN! 6 OHM ranges ±0.8% Diode Tester Trans. Tester Continuity Buzzer ti Highly Visible Yellow Color 1 Year Warranty Earn up to 800-470-WIND (9463) Free Shipping Time M -F $60 an hour 9 am to 5 pm Pacific Standard Quick Delivery via send Check or REHM or 2 -Day Priority Mail and more! Money order U.S. Sales Tax 24 Hour Fax Order Line ' CA customersI please add Prices Subject to Change 408- 987 -7735 Learn at home in spare time. Fl ' No previous experience needed! . MI. No costly school. No commuting to class. WindP r o d uii c t s The Original Home -Study course prepares Guaranteed you for the "FCC Commercial Radio- 11.,'e Stand Behind our Products....Satisfáctiou 94035 telephone License." This valuable license is P.O. Box 378 , Moffett Field, CA. your professional "ticket" to thousands of exciting jobs in Communications, Radio - TV, Microwave, Maritime, Radar, Avionics and more...even start your own business! EPROM + You don't need a college degree to qualify, PROGRAMMING SYSTEM FCC USES PARALLEL PORT but you do need an License. EPROMS (24,28,32 & 40 PIN *) PLUS 27CXXX 1 702 *, 2708 ,TMS2716 *,32,32A,64,64A,128,12M No Need to Quit Your Job or Go To School 256,512, 513, 011 ,010,101,1001,1000,1024,210,020 2001, 220,2048, 4001,040,240,4096,25XX,68764 /66 This proven course is easy, fast and low FLASH EPROMS 28F256, 28F512, 28F010 PASS 28F020, 29C257, 29C010, 29F010 ó cost! GUARANTEED You get your EEPROMS & NVRAMS (18,24 & 28 PIN+CXX) 4, FCC License or money refunded. Send for 2210, 2212, 2804 2816,2816A,2817,2864,2865,28256 28C010, DS 1220, DS 1225, DS 1230 fi FREE facts now. MAIL COUPON TODAY! SERIAL EEPROMS* (8 & 14 PIN PLUS CXX) ER1400, M58657,2401,02,04,08,16,2444,59C 11 SYSTEM INCLUDES: 8 1- 800 -932 -4268 Ext. 240 9306, 46, 56, 66, 8572, 82, 92 Or, Call PROGRAMMING UNIT tA BIPOLAR PROMS* (16 THROUGH 24 PINS) 1 74SXXX AND 82SXXX FAMILY PRINTER PORT CABLE MICROCONTROLLERS* 8741, 42, 48, 49, 8751 POWER PACK, MANUAL pRODUCTionS C5 1,8752,87C52,87C5XX X,87C75 I ,87C752,68705 AND SOFTWARE. Comm= 68HC711 E9, PIC I6C5X, TMS7742 68HC705, 1 FCC LICENSE TRAINING, Dept. 240 1 *ADAPTER REQ'D - DIAGRAMS INCLUDED San Francisco, CA 94126 SOFTWARE - READ,VERIFY,PROGRAM,COPY P.O. Box 2824, DISK FILE LOAD /SAVE, CHECKSUM, FULL Please rush FREE details immediately! SCREEN BUFFER EDITOR W/20 COMMANDS 2 89 READS HEX, S- RECORD AND BINARY FILES ADD 55.00 SHIPPING ó 60 SEC IL FAST-DEVICES PROGRAM IN UNDER S5.00 C.O.U. 1 NAME (8 "X7"X3 ")ENCLOSURE W/HANDLE RUGGED VISA/MASTERCARDD. MADE IN USA - I YEAR WARRANTY I ADDRESS 1 ANDROMEDA RESEARCH, P.O. BOX 222, MILFORD, OH 45150 1 CITY STATE ZIP 1 (513) 831 -9708 FAX (513) 831 -7562 126 L www.americanradiohistory.comAmericanRadioHistory.Com Powerful Integrated Digital and Analog (Berkeley Compatible Spice) Circuit Design and Simulation Software for Microsoft Windows (network compatible) i Best value in town!! Includes 4 Integrated Modules: LogicOeeigner + WinSpice + WinScope + %Waal Editor Perfect For Students, Technicians and Engineers!!! then kick back and watch H work" e. Ea ee xFdew iJ Simply connect your circuit on the screen, enter simulation options, CMOS, 74o, 74ioa, lel/IPw.GILpINNIEfNDfMA®. C11.016NIPLESNU .wwMw.TrweMnlMaly* Comes with two Spice libraries plus 5 more li caries of Active Digital Devices e. UM Z.o. xraa Option. ALUs, counters, MUX, FFs etc. Plus a Passive symbol library of Microprocessors and more. Use ICO y"dew UOrvoy ar4 the Symbol Library Editor to Design your own symbols and symbols to represent Sub- circuits, True Bussing, Buss pins can be assigned Unique Names. Parts Billing List, Legends, Nested Suboircuits for Hierarchical Top Down or Bottom Up Design. Checks Fan Out Violation and Electronic Rules, as per Data Books. Connectors, Spice Net list TN Device Unrt Numbers /Chip Pinouts Automatically added Generation, Continuous ZOOM In /Out, Cut/Copy /Paste. Multiple Rotatable Fonts, Rotatable Symbols. Muxipage Zoomed In /Out Printouts to any Windows Printer. ON LINE HELP LogicDesigner Digital Simulation /Schematic Capture Module Interactive Digital Simulation and Schematic Capture. Single Step Mode. Variable Speed Simulation Age DEWiyVIJ0.M Programmable Digital Delays, Muth Waveform Scrolling Timing Diagram Memorizes up to 30000 Ticks Worth Of Timing Data. Truth Table Generation. Binary to 7 Segment Displays, Hex Keypads, Programmable Clock Sources, Logic Probes Built in Logic Analyzer can be setup to generate Edge ALI FA or Level Sensitive Breakpoints. or when Signals are Equal To, Greater Than, or Less Than a Certain Value or any AND /OR Combination Sequential Breakpoints help Track Down and Debug Circuit Race MCIr Conditions Glitches, Uhl and Hold Violation and other Circuit Design Errors. Simulates Tri State, Open Collector & Don't Care Logic, RAM /ROM, One Shot, Carry Look Ahead, Shift reg, Pull Up/Down Resistors L, nS ice Simulator & WlnSco Data Anal er Modules SPICE LIBRARY: MOSFET, GaSFET. BJT. FET, Diode, OpAmps. Competitors, 555 Timer, Resistor cYaeDYd 16exeNdsyrrbollsll Cap, Inductor, Transmission Line, Controlled, Independent, Dependent, Arbitrary Source Pulse. Sin. Piece Wise Linear. and FM Sources, Current and Voltage Controlled Switches All models Expandable And User Modifiable Imports MACRO MODELS of Your Favoraite Manufacturer Supplied Parts ANALYSIS TYPES: AC, DC, TRANSIENT POLE -ZERO, NOISE, SENSITIVITY. FOURIER, TRANSFER FUNCTION, AND OPERATING POINT ANALYSIS DATA ANALYZER: Graphs Simulation Results using Multiple Plot Windows and Waveforms. Plots Linear, Logarithmic. polar, Smith Chart. BODE Type Plots + More ZOOM in and out of Plot Waveforms Plots Complex Math Expressions Using Plot 74197 -Ti-r, Variables As Arguments, Calculates Derivatives, Log, Trig functions, Define Lo,cD.tlPwTlmY,y c1ED1D10_,N.an Macros of Complex Math Formulas wry iaDq imo np 111f Price S69.99 reg S179.99 S&H S3.00 VISA/MC ISLAND LOtrIX ¡wc. 920 South West 95 Terrace Pembroke Pines, Plaids 33023 U.S.A. r r L \ LIJWSTM PH (305) 435 -7663 FAX (305) 435 -7891 COMPATIBLE CIRCLE 145 ON FREE INFORMATION CARD IC -SMALLEST 120 MW FM VOICE/PHONE TRANSMITTER /11OTRON 418.110mhx ON ANY BROADCAST RECEIVER -ROCK SOLID TUNING, DOESNT DRIFT -5 MIN. ASSEM., HEAR A WHISPER UP TO 2 MILES QUALITY ELECTRONIC -SIT PARTS PREASSEMBLED -INCLUDES TXMTR, MIC, ANTENNA, BATTERY CUP, TEST EQUIPMENT TUNING TOOL, AND INSTRUCTIONS VOICE SCRAMBLER /DESCRAMBLER KIT Sales Service -WORLDS SMALLEST AUDIO SCRAMJDESCRAM. -TALK IN PRIVACY ON AUDIO, SPKR. OR MIC UNE E/ec/ É "P/us $6 95 -HEAR THOSE GARBLED SCANNER VOICES Specialists in - Fluke, p EAXsp//e -SMALL SIZE 1'x718'x114' nPoerg -CRYSTAL CONTROLLED DIGITAL SPEECH INVERSION Hewlett Packard, Tektronix S129.95 -7 -15 VOLT DC SUPPLY -LOUD HALF WATT AUDIO AMPURER -EXCELLENT AUDIO DUALITY -INCLUDES FULL DOCUMENTATION NIST Traceable /Mil Spec 45662A -DUPLEX SCRAMBLE 8 DESCRAMBLE AT THE SAME TIME Calibration Available MICRO 1.2 VOICE RECORDER -SMALL SIZE l- I/4'x15/18'x1/4' -HUNDREDS OF APPUCATIONS -EXCELLENT AUDIO DUALITY -80 SECONDS REC/PLAY Oscilloscope Specials -8 OHM SPEAKER OUTPUT -7-15 VOLT DC SUPPLY Tek 465 100 MHZ $489.00 -100 YEAR MEMORY WITHOUT POWER -INCLUDES MIC, SWITCHES AND FULL Tek 465B 100 MHZ $589.00 DOCUMENTATION Tek 475 200 MHZ $649.00 MICRO 2B VOICE RECORDER Tek 475A 250 MHZ $749.00 MICRO 2B FEATURES SAME AS 1.2 PLUS: $109 -MULTI MESSAGES (UP TO 800 MEM.) ALL EQUIPMENT SOLD WITH WARRANTY -SMALL SIZE 1ór18 x1dr8'x1B' -VARIABLE AUTO PLAY TIMER -5 VOLT KEY OUT DURING PLAYBACK For more GREAT VALUES Call, Write, or FAX ORDER BY PHONE )R MAIL IN U.S.A. ADD S5 FCR S&H P.O. Box 708, Medford, MA 02155 C.O.D. CHARGES APPLY GF2EL0 NYS RESIDENTS AL D 7% SALES TAX TECH. SUPPORT: 1111-311-1057 (617) 391 -6858 FAX (617) 391 -6903 TECIL FAX: 51W01 -1056 127 TO ORDER: CALL 1- (800) -588 4300 www.americanradiohistory.comAmericanRadioHistory.Com Technicians Professional Tool Case PE MARKET CENTER CLASSIFIEDS $29.95 (Limited Offer) Test -800-451-7090_API? Aids (310).902-0841 Test chips for JERROLD, 7CJG17M zENI 71 SA. t Pats cable boxes in full service mode Easy inn - ation. Zenith only $39.91 Most others under $50 ea FAX (310)902-0151 antity picas sheikh & 116á mks Nolter m N table m m ad form Ibr sae .. nr aid orb. CABLE TV "BULLET" BUSTER. Protect your cable box against the infamous cable "bullet." The "Bullet" Buster acts as an electronic shield. Installs in -line in seconds. Don't wait until it's too late! $19.95 +$3.00 S &H. Electroman, Box 24474, New Orleans, LA 70184. (504) 482-3017. This hi -tech, case is designed for versitality, to Commercial quality ID signal it protect and transport costly tools, electronic devices Removable, reversible tool CBTV DOCTOR Stop the Bullet and cable lines. Send $20.00 to: R.R. Enterprise, PO and instruments. Case is available with aluminum pallet Box 3532, Easton, PA 18043. Case bottom consists of finish (281 TC) or black finish (282 TC). CABLE UNSCRAMBLED. Everything you want Thousands of cases already sold six adjustable to know, but are afraid to ask. $10.00. New Orleans, LA 70184. to technicians. compartments Electroman, Box 24474, satisfied (504) 482-3017. Other cases also available. Dealer inquiries welcome. Foam lined interior CABLE - SAFE. Guarantee cable privacy. The To order call: 2 keyed locking latches one way valve for your cable TV signal. $29.95, 4- Fax (713) 395 -8372 Adjustable shoulder strap $3.00 S &H. Electroman, Box 24474, New (713) 395-8370 Orleans, LA 70184. (504) 482 -3017. Terms: Visa M/C C.O.D.'s or send check or Reinforced steel corner braces DESCRAMBLER SCHEMATICS REVEALED. A money order to: RATTNER NORTH AMERICA, powerful guide to descrambling schemes. $10.00. Tool Utility Cases, 5090 Richmond, Ste. 334, Size 18" x 6 1/4" x 13" ELECTROMAN, Box 24474, New Orleans, LA 70184. (504) 482-3017. Houston, Texas 77056 (Tools Not Included) CABLE TV DESCRAMBLERS. All major brands. Have make /model used in ur area when calling 1 (800) 327 -3407. For a free catalog write K D Radiotelephone - Radiotelegraph Video, PO Box 29538, Minneapolis, MN 55429. CABLE TV CONVERTERS! JERROLD, OAK FCCCommercial ZENITH, SCIENTIFIC ATLANTA, PIONEER...EXCELLENT PRICES! PERSONA- License BLE SERVICE! 30 DAY MONEY BACK GUAR- nitmARYmAC ANTEE! INNOVATIVE ELECTRONICS INC., 1 The New Realistic® VISA /MC /C.O.D. ASK FOR r Why Take Chances? JOHN OR BILL!. Discover how easy it is to I PRO -43 Scanner pass the exams. Study with the I most current materials available. Our Audio, Video I Radie /hack Satellite -TV Homestudy Guides, -60% or PC "Q &A" pools make it so fast, I PHONES :::SAVE40%;:;1 800 -334 -6455 easy and inexpensive. No college or Our 18th year of DISCOUNTS 00 218-739-5231 Int'l 218-739-4879 Fax I experience needed. The new Toll Free 800. 231.3680 SkyvER O FlnG s - US FALLS MN 56537 commercial FCC exams have been I PRO -43 List $349.95 ad in The Market Center revised, covering updated Aviation, Our Delivered Price $288.00 See full page Marine, Radar, Microwave, New I IF ON SALE, WE ARE CHEAPER! Rules & Regs, Digital Circuitry & I We discount everything in the RS catalog more.We feature the Popular 22511 Katy Fwy. SATELLITE EQUIPMENT Electronic Career Guide" "Complete Katy (Houston), TX 77450 VIDEOCIPHER II Descrambling manual. 1000's of satisfied customers 1- 713- 392 -0747 FAX 713- 574 -4567 Shematics, video and audio, $18.95. Software, $25.00. Videocipher II 032, $15.00. Videocipher II Guarantee to pass or money back. Plus, $20.00. VCII Plus software, $30.00. I Box 30502PE, Bethesda, MD I FREE DETAILS or call Cabletronics, Send for 20824. 1- 800 -800 -7588 .1 L SAVE $$$ TROUBLESHOOTING your satellite WPT Publications system yourself! Simplified manual $14.95: T. 7015 N.E. 61st Ave Dept. 10 CABLE TV EQUIPMENT Dee, POB 858, Fleischmanns, NY 12430. Vancouver, WA 98661 We carry a complete line of all ma /or brands I Including test chips and all accessories SATELLITE RADIO BOOK AND GUIDE. New book covers all audio services, SCPC, subcar- Name PRICES QUANTITY DISCOUNTS BELOW WHOLESALE riers, FM squared, facsimile, press services, GUAR. 1 YR. WARRANTY 30 DAY MONEYBACK weather services. Simple how- to-receive instruc- Address SATISFACTION YEARS OF CUSTOMER tions. $16.95 plus Priority Mail. UNIVERSAL C & C ELECTRONICS 4555 Road, #12, City St. Zip 1 ELECTRONICS, Groves CALL NOW 1- 800 -995 -1749 Columbus, OH 43232. (614) 866-4605. 128 L 1- 800_800 -7588 _ J lmmed. Delivery from Giant Stockt Sorry No California Sales www.americanradiohistory.comAmericanRadioHistory.Com Don't Despair...REPAIR! Here's how to troubleshoot and repair your electronics successfully! You Can Be Your Own Repair Expert! For VCRs, camcorders, audio equipment, TV equipment, computer hardware, office equipment, home appliances, automobile electronics, and outdoor equipment. analyze problems quickly. Pinpoint and One Source For All Your Repair Needs! Successfully complete repairs with hands-on Better organized than a magazine, more current than a book troubleshooting instructions. 900 -page manual skilled understanding flowcharts and Become easy -to- follow, detailed instructions schematic diagrams. ' trouble analysis flowcharts Confidently use test equipment such as safety precaution checklists oscilloscopes, frequency counters, and comprehensive replacement parts list video analyzers. directory of manufacturers Keep your equipment in top condition with effective preventive maintenance techniques. Repair Continue to Broaden Your Electronics Repair Expertise! Manual You'll receive quarterly supplements, up to 160 pages, with new step -by -step repair and maintenance instructions, valuable schematics and new repair techniques. Learn how to repair a growing variety of appliances with hands -on repair projects that will keep you up -to-date with later models and technology. You'll be thrilled with your ability to repair a growing list of electronic equipment! Supple- ments may be returned or cancelled at any time. SAVE $10 Please rush me a copy of the new Electronics Repair Call our toll -free number, MONEYBACK òYESI. Manual for only $59.95 + $5.50 shipping and pay by credit card, and mention GUARANTEE handling. I understand that if I am not satisfied I may return the manual within 30 days for a complete refund. Supplements are this ad. We'll deduct $10! There's no risk in trying the sent quarterly for 25a per page (never more than $30) and may be We'll also waive ELECTRONICS returned or cancelled at any time. REPAIR MANUAL My payment is enclosed Bill me later shipping and handling. to see if it's right for Charge my C Visa MasterCard you. If you are not Order today for your 30 -day, no -risk delighted, simply Acct. No. Exp. Date return the manual Signature review of The Electronics Repair Manual. after the 30-day trial period and Signature and phone ,s Phone ( number are required receive a for all orders. prompt refund. Name For Faster Service Call TOLL -FREE Address 1- 800 -222 -WEKA City State Zip e11ECH All payments must be in U.S. funds. Canada add $10. Or Fax To: 1-203-622-4187 <<á, All other countries add $15. CT residents add 6% sales tax. 97 Indian Field Rd. CIRCLE 133 ON FREE INFORMATION CARD Mail to: WEKA Publishing, 97 Indian Field Rd., Greenwich, CT 06830 <<ÿ, Greenwich, CT 06830 Yg l,r. y1 5;::i: :,;. ïi.'\SF; ' 129 www.americanradiohistory.comAmericanRadioHistory.Com PE MARKET CENTER CLASSIFIEDS Quality Microwave TV Antennas TIRED OF IRONING? Prototype service for hob- ss C A B L E T V WIRELESS CABLE IFTS - MMOS - Amateur TV byists & engineers. Single /small quantity Ultra High Gain 5011ó1+1 Tuneable 1.9 to 2.7 Ghz. PCB's. No setup fee. $10.00 minimum, most DESCRAMBLER LIQUIDATION! 55- Channel Dish System $199.95 boards $25.00. We scan magazine artwork free! 36- Channel Dish System $149.95 Get out your back issues! FIRST PROTO, (407) FREE CATALOG, 20- Channel Dish System $124.95 Hamlin Combos $44, Oak M35B $60 (min. 5), etc. Optional Commensal Grid Antenna not shown) Add 55600 392 -8677. Yogi Antennas, Components, Custom Tuning Available turn signal re- WEST COAST ELECTRONICS Cal or write (SASE) for "FREE" Catalog SILENT SAM. Patented vehicle For Information: 818- 709.1758 MPS-TECH ELECTRONICS minder. Outshines others. Brief, timely alerting Catalogs 8 Orders: 800-628-9656 Dish System P.O. Box 9533 Scottsdale, AZ 85252 signal doesn't bug you. Kit complete w /case No Caldornia Sales UFETIME (802) 153.00 Credit phone orders) $15.00. Visa/MC. 1 (800) 398 -5605 literature. WARRANTY aNu here COO'! ooey Also, $22.00/$27.00 wired models. Silent Sam, 1627 Basil Dr., Columbus, OH 43227. PROJECTS. $2.00 gets flyer, 100 piece grab bag. Lynn Johnson Electronics, Box 51268, San Jose, CABLE DESCRAMBLERS Build your own, MISCELLANEOUS CA 95151 -1268. SSAVI, gated sync, sinewave. $14.95. Box 30502PE, Bethesda, MD ELECTRONICS FOR SALE Radio Shack. Cabletronlcs, MINI -FM transmitter. Buy parts at 20824. Electronics, NEW SURPLUS ELECTRONIC PARTS. Call or Complete plans $3.00. Lynn Johnson fax anytime for catalog #P11. Voice 1(800) Box 51268, San Jose, CA 95151 -1268. HOBBYIST CIRCUITS - Remote room monitor, and 290 -2694. Fax (916) 823- 0643.CCSNOW ELEC- tone decoder, long distance circuit control TRONICS. more. Simple experiments for the beginner. CAT- ALOG $2.00 - Garrett Plans, Box 155, VIDEO GAME training videos for NES, Super Jamesburg, NJ 08831. NES and SEGA Genesis, tools, parts, sche- kits. 65 to 305 matics. Send SASE for free catalog. Irata Sys- Prototype it FAST! SURVEILLANCE TRANSMITTER 2562 East Glade Ave., Mesa, AZ rlMROroWlcY8051pD MHz. Quick & Easy. Partially assembled units. tems, - ....: ,...... ' - . COnW,e,+p'eWxeow,wen Five minutes completion. 110 -volt duplex recepta- 85204 -6208. . aa,zhrmP«.w,aedRAP POP e. cle, room battery types, and telephone. Counter - FIBER OPTICS EXPERIMENTERS PARTS AND Áuu «:,'"°'ma:°óm., surveillance. Catalog: $2.00. SHEFFIELD ELEC- fiber, cable, connectors, splices, de- .. ready N. SP .P PP IL SUPPLIES: TRONICS, PO Box 377940 -B, Chicago, ÿs , a...... m.,nap* tectors, lasers, kits, plans, newsletter. Send $2.00 ProleOUleA D and 8051 60637 -7940. for catalog, Lightline Engineering, PO Box 24, Mullica Hill, NJ 08062. $99.00 . FASCINATING DEVICES! FREE plans with oarts special! Super spy microphone $19.501 Super FM !i114ú1) Pounatafa. .. THE Case Against Patents. Thoroughly tested wows" . transmitter varactor tuned $22.50! Vocal truth de- Run of owrno. sod. p.m,.nw (513) 581 -4060 and proven alternatives that work in the real world. horn Me .ew one WITHOUT vaooearr10I ® tector $39.501 Bug detector 10 GHz bargiraph, $28.50. SYNERGETICS PRESS, Box 809 -C, audible $47.50! Universal IC tester tests any IC Thatcher, AZ 85552. (602) 428 -4073. Visa/MC. $24.50! Hypersonic dazer defend yourself $34.50! Radar cloaker electronic shield $29.501 AUTOMATIC WIRE STRIPPER with wire cutter, Laser jammer $39.501 PC Boards $10.00 each. small wire #12 to #24, save time and money, $25.001 S &H $5.00, catalog wire stripper, retail $29.95. Package of all 8 plans easiest and quickest $4.00 (creditable) or included with order! Send $14.95 each, includes shipping, to D &G In- ::BROADCAST & SURVEILLAHcE:: 17919 - 77th Avenue, ternational Lighting, PO Box 17668, San Diego, QUANTUM RESEARCH, 70- 120MHz FM Transmitters & RF Amplifiers Edmonton, Alberta, Canada T5T 2S1. CA 92177. Calif. plus sales tax. RF Power /SWR Meters, Stereo Generator, DC Power Supplies, Audio Limiters, Electronic & RF UNINTERRUPTED MUSIC, news networks, Components, Plans, Kits, and more! Send S2 for sports feeds, reading for sight impaired, and dig- complete information, get S2 discount on first order. ital from FM subcarriers. For data are available PProgressive Concepts 1434 N. MILLS AVENUE, B FREE catalog of subcarrier (SCA/SAP) receivers (909) 626.4969 CLAREMONT, CA 91711 MUSIC & ACCESSORIES write AJL ENTERPRISES, and other devices, MUSICAL INSTRUMENTS, discount prices, free Box 5354, High Point, NC 27262. catalog. Freeport Music, 41A Shore Drive, Huntington Bay, NY 11743. SUPERIOR GUITAR EFFECT + FREE 3D Wild- ELECTRIC DOG DOOR, entrancing LED clock, hot sound, drives headphones, belt clip, $38.00. CD scratch remover, computer clocks, awesome More - 24 hr sample /infor (407) 727-0137. Visa/ SOUP RVEULLIA INC F phones, plans, kits and more. FREE CATALOG, MC /Disc /AmExp. 8 COUNTERSURVEILLANCE Electronic Devices CAMPBELL ENTERPRISES, 27955 Terrace Vehicle Tracking Bug/Phone Tap Detectors Caller ID PE10, North Olmsted, OH 44070. EASY WORK! Excellent pay! Assemble products Covert Video Phone Scramblers Voice Changers at home. Call toll free 1 (800)467 -5566 ext. 5192. Shotgun kilos Transmitters Lockamithing AND MORE! THE ONLY CATALOG NEEDED! Kits, plans, sur- veillance, test, radios, more! Part locating. Best at 7- Hour Telephone Recorder GREAT EXTRA income! Assemble products Tapes incoming/oulgoing phone cal/s automalical/y. $125.00 prices(Send $1.50 (refundable) NEUTRONICS, 4 home. Easy and fun to do. Guaranteed! 1 (800) Croydon Ct., Englishtown, NJ 07726. 377 -6000 ex7930. GIGOFOR CATALOG SEND $5.00 TO... P.O. Box 337, Buffalo, NY 14226 (716) 695-8660 LOW COST Current Limiter. Have you ever re- START your own technical venture! Don Lan- placed an expensive component, and had it burn . caster's newly updated Incredible Secret Money out again. This low cost current limiter can be built Machine II tells how. We now have autographed for under $10.00. Complete plans $5.95. Grady copies of the Guru's underground classic for Electronics, PO Box 112, Winchendon, MA01477. $18.50. SYNERGETICS PRESS, Box 809 -C, Thatcher, AZ 85552. (602) 428 -4073. Visa/MC. PLANS -KITS -SCHEMATICS MANUFACTURERS SERVICE manuals. TV - stereo $15.00, VCR $25.00. Shipping $2.00. NEED MONEY? Make extra money at home in ohms, fre- BUILD - FIVE -digit, capacitance, TV, 9937 Rhode Island Ave., College your spare time. Information FREE. Bay State instructions Edgewood quency, pulse, multimeter. Board and Park, MD 20740. Visa /Mast (301) 441 -9116. Specialties, Box 191, Hopkinton, MA 01748. 179 May, Fairfield, CT $9.95. Bagnall Electronics, Check, money order. 06430, DISTRIBUTORS NEEDED for hi -tech products everyone wants, nobody has. Call 1(800) ALL -IN -ONE catalog. AM/FM /ham /spy, trans- 326 -2963, then get started. (704) 391 -7425. mitters, amplifiers, receivers. Voice scramblers/ disguisers, audio, TV, Tesla coils, plans, "secret" books, kits, imports, exports and more. Start your own licensed or unlicensed radio station, 60 full pages for $1.00. PAN -COM INTERNATIONAL, BUGGED ?? PO Box 130 -H10, Paradise, CA 95967. EAVESDROPPING is unbelievably widespread] Electronic PUBLICATIONS Devices with amazing capabilities can be monitoring your FM STEREO TRANSMITTER kit broadcasts any telephone end room conversations RIGHT NOW! Are yod FREE PROGRAMS, games, information from lo- audio signal to FM stereo radios throughout your eure you're sete? FREE CATALOG tells you fast) Includes cal computer bulletin boards. "A Guide to home. Uses unique BA1404 IC. Complete kit: Free Bonus details on fantastic opportunities now open in Computer'BBSing," 87 ages explains, $11.95. PC board /components - $24.00. Visa/MC. Counter-Survelllence field. Exciting, immensely interesting Imprint Publications, 35775 Schmid #103, New hi') full /,art-time TENTRONIX, 3605 Broken Arrow, Coeur d'Alene, and EXTREMELY profitable (u to $250 income. Call Nowl Baltimore, MI 48047. ID 83814. (208) 664-2312. 1- 800 -732 -5000 www.americanradiohistory.comAmericanRadioHistory.Com TOLL FREE ORDER HOT LINE 1-800423-0070 ALL NEW -- IMPROVED STEREO FM TRANSMITTER LOADED WITH FEATURES * RF AMPLIFIER * FRONT PANEL FINE TUNING * STABLE OPERATION * INPUT LEVEL ADJUSTMENTS * WORKS WITH DIGITAL TUNED RADIOS * 38KHz CRYSTAL MULTIPLEX CIRCUIT DC'S all new FM Stereo Transmitter Kit based on the unique BA1404 Stereo Broadcaster Integrated Circuit that includes all the complex circuitry to generate the stereo signal. We've added an RF aMplifier circuit to provided excellent transmit range. Additional features like electronic fine tuning, voltage regulation, 38KHz multiplex crystal, input level adjustment makes the Stereocaster the top of the line Stereo FM Transmitter. ORDER STEREOCASTER $29.95 FUNCTION GENERATOR KIT ORDER FG2 KIT MAKE CIRCUIT BOARDS $19.95 THE NEW, EASY WAY A gres pro - o en ance your bench. This handy little func- tion generator has a built-In buffer amplifier, a 3- decade range WITH TEC -200 FILM selector switch that covers 15 hZ to 25 khZ, output level con- JUST 3 EASY STEPS: trol and sine, square, or function switch to select triangle. Copy circuit pattern on TEC200 film using any plain paper copier Iron film on to copper clad board MORE KITS Peel off film and etch convenient 6!4 x 11 size POWER SUPPLY KIT 3 DVM ONLY 3" X 3" READS 0 TO DIGIT LED With Complete Instructions PS -1 $16.99 100V DC ORDER DVM3 $19.95 utput of this power supply is con - FM WIRELESS BROADCASTER FMI $ 9.95 ORDER TEC200-10 (10- SHEETS) $5.95 niously adjustable from 1.2 to 25V 8038 FUNCTION GEN. KIT FGI $ 9.50 . The LM317T voltage regulator SEQUENCER PROJECT SEQKIT $ 9.50 rovides excellent regulation and TREE PROJECT CHRISTMAS UNIVERSAL DECODER IC'S pple rejection. Includes a 1 A Build this unique seasonal project and have REFER TO RADIO ELECTRONICS MAY 1990 ransformer, PC board, LM317T, 2 an unusual converstion piece. Powered by finding posts, and all small parts. two D cells, 17 LEDs flash In a seemingly ran- CD22402E 7.95 CD4040 .65 dom fashon. Kit Includes everything except LM733 .99 CD4053 .59 batteries. ORDER XMASKIT $16.95 LM7805 .50 LM7812 .50 CA3126E 1.95 LM7905 .50 74C00 .50 3.58 MHz 1.00 DC ELECTRONICS Master Card NE564 2.29 18 Uh 39 SEND MAIL ORDERS TO: PO BOX 3203 SCOTTSDALE, AZ 85271 ADD $4.00 S &H 131 CIRCLE 50 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com USE PE MARKET CENTER CLASSIFIEDS READ BY 87,877 BUYERS OF ELECTRONIC EQUIPMENT ACCESSORIES AND PARTS INSTRUCTION FOR PLACING YOUR AD! HOW TO WRITE YOUR AD per ad per insertion (15 words). Any words that you want set in (not in all TYPE or PRINT your classified ad copy CLEARLY bold or caps are 200 each extra. Bold caps are 400 each extra. more than one capitals) using the form below. If you wish to place Indicate bold words by underlining. Words normally written in all of ad, use a separate sheet for the additional ads (a photocopy caps and accepted abbreviations are not charged as all -caps list and this form works well). Choose a category from the below words. State abbreviations must be Post Office 2 -letter abbrevia- the top of the order write that category number into the space at tions. A phone number is one word. form. If you do not specify a category, we will place your ad under Miscellaneous or whatever section we deem most appropriate. CONTENT All classified advertising in the PE Market Center is limited to in full must accompany We cannot bill for classified ads. Payment electronics items only. All ads are subject to the publisher's ap- in the same your order. We do permit repeat ad or multiple ads proval. We reserve the right to reject or edit all ads. issue, but in all cases, full payment must accompany your order. DEADLINES WHAT WE DO Ads received by our closing date will run in the next issue. For first two words of each ad are set in bold caps at no extra The example, ads received by November 15 will appear in the march, charge. No special positioning, centering, dots, extra space, etc. 1994 issue that is on sale January 18. The PE Market Center is can be accommodated. published monthly. No cancellations permitted after the closing RATES date. No copy changes can be made after we have typeset your Our classified ad rate is $1.00per word. Minimum charge is $15.00 ad. NO REFUNDS, advertising credit only. No phone orders. AD RATES: $1.00 er word. Minimum 515.00. Send your ads with payment to: Popular Electronics Market Center, 500-B Bi -County Blvd. Farmingdale, NY 11735 CATEGORIES 100 - Antique Electronics 270 - Computer Equipment Wanted 450 - Ham Gear Wanted 630 - Repairs- Services 130 - Audio -Video- Lasers 300 - Computer Hardware 480 - Miscellaneous Electronics For Sale 660 - Satellite Equipment 160 - Business Opportunities 330 - Computer Software 510 - Miscellaneous Electronics Wanted 690 - Security 190 - Cable TV 360 - Education 540 - Music & Accessories 710 - Telephone 210 - CB- Scanners 390 - FAX 570 - Plans- Kits -Schematics 720 - Test Equipment 240 - Components 420 - Ham Gear For Sale 600 - Publications CLASSIFIED AD COPY ORDER FORM Ad No. 1-Place this ad in Category # - - $32.00 1 - $15.00 2 - $15.00 3 - $15.00 4 - $15.00 29 - $29.00 30 - $30.00 31 $31.00 32 - 5-$15.00 6 - $15.00 7 - $15.00 8 - $15.00 33 - $33.00 34 - $34.00 35 - $35.00 36 $36.00 - 40 - 9 - $15.00 10-$15.00 11 -$15.00 12-$15.00 37 - $37.00 38 - $38.00 39 $39.00 $40.00 Ad No 1 -Total words x $1.00 per word = $ 13 - $15.00 14 - $15.00 15-$15.00 16-$16.00 x .20 per word = $ .-. All Caps words Bold words x .20 per word =$ -§ 17 - $17.00 18 - $18.00 19 - $19.00 20 - $20.00 8 Bold Cap words x .40 per word =$ 21 - $21.00 22 - $22.00 23 - $23.00 24 - $24.00 TOTAL COST OF AD No. 1 $ E e g 25 - $25.00 26 - $26.00 27 - $27.00 28 - $28.00 Card # w Total classified ad Payment $ enclosed. E Expiration Date - o. minimum credit [ ] Check [ ] MasterCharge [ ] Visa ($15.00 Signature card order) Name Phone 132 Address City State Zip www.americanradiohistory.comAmericanRadioHistory.Com - CABLE 011' CHANNELS CABL DIRECT GuARA1;ED ECIUIPME Now you can tune -in to your MAGIC Box favorite cable TV programming The nationwide source and SAVE 100's $1000's -EVEN Poi waste your money for cable TV equipment. on premium on outdated technology WHERE THE DEALERS BUY." CABLE TV EQUIPMENT The Alpha Cable Box offers you "BUY Converters Descramblers Filters leading edge technology to con- nect to the worlds best cable TV TV Cable Descramblers programming Now you can own and Converterters Catalog. Open Every Dayf ID the multi-video box at the future. MODERN ELECTRONICS Free Catalog. MEGA EIECTROf11C$ "Buy where the dealen buy" VISA SAC SAVE 1- 800 -906 -6664 C.O.D. 1 -800- 676 -6342. 1oos's « 21 S. Main St., Winter Garden, FL 34787 100°,1 MONEY BACK GUARANTEE! 30 DAY FREE TRIAL! Star Electronics 1- 800 -282 -4336 Infiniter- Laser Pointer X10 CO- PROCESSOR Y..VCRTarn Attracts the attention of your audience CAN PLAY AS Presenting, Conferencing, Instructing, Directing INTERFACE BOARD Modal a NBK Por atyN, Brau oa.lrp Provides simplified interface to CLEAR AS DAY! Why put up with Inconsistent any TW523 module for complete Color, Flashes, Streaking Modal e 2t0 Dual function, Aluminum cuing reliable 2way X10 communication. and Interference! - $49.99 Call or write for details about kits UNJAM NOW WITH 322 -1429 INTELESTAR 1121 .yaro,ed tr include 2 -AAA'. 5.uenn I re., ..rr.M_ and boards. BBS (407) Order call: 800 -520 -8435 Marrick Limited, Inc. Easy Connection. Eliminates ammilg 950940 Copy any tape Quarton USA, LTD. CO. P.O. Box $J995 7042 Alamo Donn, Parkway, Suite 250. Lake Mary, FL 32795 RC Plugs Included San Antonio. Texas 7822014518 STAR ELECTRONICS 30 Day Money Tel: 1210) 520-8430 Fax: (210) 520 -8433 (407) 323 -4467 / 324 -1291 FAX 1- 800 -282 -4336 Back Durantee DEALER AND REP. WANTED 2 : ar wane IrksTEKI Test & Measuri ng Instruments DC POWER SUPPLIES ISO 9002 CIERTIFICATION PR- Middle Series (Analog /Digital) 1934163 O Continuous or Dynamic load for internal selectable O Low ripple and noise O 0.01% high regulation O Overload and Reverse polarity protection O Constant voltage and constant current modes O 31/2 Digits 0.5" LED display (Digital type only) MODEL #PR6030D (Digital) Regular $500.00 Model Output Volts (V) Output Amps (A) Weight (kg) Sale $399.95 Analog PR -6030 0-60 0 -3 11.5 MODEL #PR6030 (Analog) Regular $379.00 Digital PR -6030D 0 -60 0 -3 11.5 Sale $299.95 MP TOLL FREE PRINT 800 -638 -2020 tíiìIi NEW 84 PAGE CATALOG!!! International l Your FREE Products Call Today For Copy Test Instruments, Equipment and Tools, Training and Supplias for Electronic Maintenance and Repair Of The 1994 Print Test 8931 Brookville Road Silver Spring, Maryland 20910 ' 800 -638-2020 Fax 800 -545 -0058 Equipment Catalog! 133 CIRCLE 150 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com IIMM MIN NNIMI Double Your Income! Own your own NEW BOOKS computer repair business for the Project Builder or add computer repair BP350- ELECTRONIC BOARD I GAMES $6.00 to your existing business. Twenty novel electronic board games that you can build from the plans in this TechSery can put you into your own computer book. Whether you are interested in and efficiently. repair business quickly, economically motor racing, searching for buried trea- that during a recession, computer Research indicates sure on a desert island or for gold in Fort repair businesses will grow at twice the rate of Knox, spinning the wheel of fortune, or hardware sales. TechServ's complete support doing a musical quiz -there is some- program gives you the opportunity to be a part of thing for you to build and enjoy! this fast growing industry. Proven Marketing Plan PCP119- ELECTRONIC MUSIC Recognition AND MIDI PROJECTS $14.95 Nationally recognized trademarks and logos give Save cash by building the MIDI gadgets you immediate recognition as a professional you need. Want a MIDI THRU box, pro- computer repair specialist in your area. gram change pedal,. Metronome, analog Training echo'ùnit, MIDI patchbay or switcher? Ov ç16practical and very useful music Level 1 286/386/486/586 and IDI projects all in this book! The Troubleshooting, upgrades, advanced projects are explained in detail with full diagnostics instructions on assembly. Level 2 Networking /Novel /Unix /Multi -user/ Multi- tasking configuration /Installation/ BP301-ANTENNAS FOR VHF Maintenance.Prepare for C.N.E. for L-1 AND UHF $6.00 test Antennas (Certified Network Engineer) VHF and UHF From installing a TV or FM antenna to Parts and Board Repair setting up a multi- antenna array for Single source for OEM /generic parts and board shortwave listening or amateur radio, repair. Order 7 days a week /24 hours a day. this book explains the basics of VHF and $45 million in parts in stock, ready to ship any UHF antenna operation and installation. where, overnight if required. The text describes in easy -to- understand Documentation terms the essential information about We provide manuals, documentation and how antennas works, the advantages of and how to get advanced diagnostic software. different antenna types, the best performance from an antenna. New Hardware We provide new hardware for IBM, Compaq, Mail to: Technology Today, Inc. Apple and compatibles at huge discounts. Custom Electronic P.O. Massapequa Park, NY 11762 -0240 build your own systems. Box 240 Over 300 dealers worldwide Shipping Charges in USA & Canada Find out why the Wall Street Journal and Fortune $0.01 to $5.00 $1.50 $30.01 to $40.00 $5.60 Magazine call computer repair the business $5.01 to $10.00 $2.50 $40.01 to $50.00 $6.50 opportunity of the 1990s. $10.01 to $20.00 $3.50 $50.01 and above $8.00 Call TechSery at (212) 967 -1865 $20.01 to $30.00 $4.50 All or fill out coupon below and mail to: Sorry, no orders accepted outside of USA and Canada. payments must be in U.S. funds only. n Number of books ordered. tech serv. Total price of books $ America's largest chain of independent, Shipping (see chart) $ licensed computer repair centers Subtotal $ Tax (NYS only) Q 253 West 28th Street, New York, NY 10001 Sales $ Total enclosed $ w NAME Name co Address a. ADDRESS i City State ZIP CITY STATE ZIP Please allow 6 -8 weeks for delivery. TELEPHONE [PE 2/931 IN= 134 N M m J INFORMATION CARD - 130 FREE - CIRCLE ON www.americanradiohistory.comAmericanRadioHistory.Com Electronic and AMAZING Scientific Products Mystery Levitating Device! Remember War of the World? Objects float in air and move to the TV St FM Joker / Jammer touch. Defies gravity, amazing gift, onversabon piece, magic Vick or Shirt pocket device allows you to totally control and remotey disrupt TV great silence project. or radio reception. Great gag to play on family or friends. Discretion ANTIK Easy to Assemble Kit I Plans $19.50 required. EJKIKM Easy to Assemble Electronic Kit $2430 Laser Ray Gun INFINITY TRANSMITTER ++ Visible Beam Laser Room Monitor I Phone Line Grabber High brightness red HeNe laser visible for miles. ALL NEW! The Ultimate in Home or Office Security 6 Safety! Produce your own light show! Projects a visible beam of red lite dearly Simple to Use! Call your home or office phone, push a secret tone on visible in most circumstances. Can be used to intimidate by projection your telephone keypad to access either: A. On premises sounds and 11.1 of a red dot on target subject. Also may be used to listen in using our voices; or B. Existing telephone conversation with break in capability for laser window bounce method 4LLIS1 below. Easy to bind module emergency messages. CAUTION: Before assembly or use, check makes A working visible laser! legalities with your state Attorney Generals office as you may require LASTKM Kit w11mw Laser Tube, Class IL $6930 "beepers" or other 3rd party alerts DANGER LAS3KM Kit w12.5mw Laser Tube, Class ILIA $9930 TELEGRABI Plans Only $10.00 NIMBLE LAM NOOK* WOWEVE ORSAM Exvon J I TELEGRABIK Kit / Plans $99.50 TO DMECT ORSCATrER RADIATION CIA%w USER PRODUCT Ultrasonic Blaster Advanced project produces a burst of light energy capable of burning Laboratory source of acoustical shock holes in most materials. Hand-held device uses rechargeable batteries. waves. Blow holes in metal, produce "Laser Bounce" Listener System 500 joules of flash energy excite either a neodymium glass, yag or other \ 'cold' steam, atomize liquids. Many suitable 3' laser rod. This is a dangerous CLASS IV project (individual Alloys you to hear sounds horn an area via a lite beam reflected from a deaning uses for PC boards, jewelry, y \nom partslassemblies available) window or other similar objects. System uses our ready-to-use LATRI coins, small parts, etc \\ \ Laser Terminator gun site as the transmitter. The receiver section is LAGUNI Plans $20.00 ULB1 Plans $10.00 ULBIKKIt/Plans.....$69.50 LAGUNIK Kit I Plans Price on Request supplied as an easy - to-bu /d kit, inducting our ashbned HS10 100,000V Intimidator / headsets. LLIST2 Plans $20.00 Extended Play LLIST1K Kit of Both Transmitter and Receiver $19930 Shock Wand Module LLIST20 Assemble with Laser Gun Site $29930 Telephone Build an elect/id device that is affective up to 20 feet. May be *3mw Visible Red Pocket Laser ®®O enclosed for handheld, portable field or laboratory applications. Recording System Ublizes our touch power control! ITM2KM Easy-to-Assemble Electronics Kit $49.50 READY TO USE! Automatically controls and records on our X -4 VRL3KM Kit I Plans .574.50 ITM2 Plans only, creditable to kit $10.00 extended play recorder, taping both sides of a telephone conversation. Electronic Intended for order entry verification. Check your local laws as some \I/ `11 states may require an alerting beeper. Hypnotism TAP2OX Ready to Use System $129.50 Puts subjects under control using highly effective electronic stimuli. Intended for paroles and entertainment but must be used with minion. Includes valuable text book reference and plans. Ion Ray Gun EH2 Plans and Text Book $1950 Shocker Force Field / Z Projects that induce in people Pocket - charged ens shocks and objects without Sized Night Viewer Vehicle Electrifier any connection! Great science project as well as a high tech party Uses Low Level Starlight prank. 1063 Plans $8.00 to See in the Dark! Neat little device allows you to make hand and shock balls, shod( I003K Kit/Plans $69.50 Low Cost wands and electrify objects, charge capacitors. Great payback for Ultra -Hi Lite Amplification! those wise guys who have wronged you! Invisible Pain Auto Brightness Control SHKIKM Easy to Assemble Electronic Kit $24.50 Field Generator Limited Amount Available )) Made in USA Night surveillance Animal studies, etc. Shirt pocket size electronic Can be used to fly an airplane or drive a car! device produces time variant PKV7 Plans $15.00 complex shod( waves of intense directional acoustic energy, capable of PKV7K Easy to Assemble Kit Price on Request warding off aggressive animals, etc. PKV70 Ready to Use Price on Request IPG7 Plans $8.00 IPG7K Kit/Plans ...$49.50 IPG70 Assembled $7430 3 Mi FM 1000 Ft ++ Wireless Microphone Blaster Pulser Potato Cannon Subminiature! Crystal dear, ultra sensitive pickup transmits voices and sounds to FM radio. Excellent for security, monitoring of children or Pocket -sized wand produces 100,000 watts of power for personal NOTA TOY. Uses electronic or piezo invalids. Become the neighborhood disk jod(ey, or go "under cover defense, field and lab use, etc. BLS3 Plans $10.00 ignition. CAUTION REQUIRED! using our sunglasses FM radio (see ca!a!og). FMV1 Plans ... $7.00 BLS3K Kit / Plans $69.50 POTI Plans FMV1K Kit and Plans $39.50 (Dangerous Product) $10.00 Homing I Tracking Transmitter SUGL10 Sunglasses with built In FM Radio $29.50 Beeper device, 3 mile range. Telephone Transmitter - 3 Mi HOD1 Plans ..._...... $10.00 HOD1K Kit Plans $49.50 FireBall Gun ktomaocaly transmits both sides of a telephone conversalon to an FM Listen Through Walls, Floors Shoots flaming ball - two shot capacity radio. Tunable Frequency Undetectable on Phone Easy to Build Great for special effects and remote and Use Up to 3 Mile Range Only transmits during phone use. Highly sensitive stethoscope mike. fire starting. CAUTION REQUIRED! VWPM7 Plans $7.00 STETHI Plans $8.00 STETHIK Kit/Plans FIREBALL Plans (Dangerous Product) $10.00 Ilk $44.50 VWPM7K KIVPlans $39.50 CATALOG Order by Mail Dept PEM16, Box 716, Amherst, NH 03031 With many or by 24 Hour T10N more items! Orders -Only Phone Phone: 603 -6734730 FAX 603 -672 -5406 Free with Order or send PAM 135 NLIMITED - VISA. COD, Cheeks.ce.pad Please. add $5.00 Shipping AHandling S1 800 -221 -1705 www.americanradiohistory.comAmericanRadioHistory.Com Home Automation Enthusiasts Universal Programmers PE MARKET CENTER r,r.de IL á Largest Selection In The World , .. -... CLASSIFIEDS 9 S g. Also Buy, Sell & Program n Gm, Plus Never Undersold/ ...a e $1399 DATA I/O CHIPLABS 4800 DIRECT WIRE TO FACEPLATE $ 849 DATA I/O CHIPLABS 3200 OR SOFT TOL CH UNIVERSAL COMPUTER SOFTWARE BUTTONS REMOTE $ 579 EETOOLS ALLMAX PRINTED CIRCUIT board program. Draw circuit $ 479 EETOOLS PROMAX RIB RIB board traces quickly, under MS-Windows. Send $ 479 XELTEk SUPERPRO II $20.00 to SYTEC, 223 Cambridge Road, Cherry X -10 OR $ LEARNING CUSTOM 350 XELTEK SUPERPRO (R) Hill, NJ 08034. REMOTE REMOTE $ 499 LOGICAL DEVICES 3000 REI3 LOTTERY PROGRAM Increase your probability, RIB $ 499 ADVANTECH PC- UPROG, don't pick in the dark. Send $10.00 for DOS or RIB Raluute h:cptulsion IknuJ $ 429 NEEDHAMS EMP -20 . $12.00 for MS-Windows version to SYTEC, 223 Remdelmaóo¢Boad $ 779 DATAMAN S4 Cambridge Road, Cherry Hill, NJ 08034. $ 499 AMERICAN RELIANCE 9860 MORE! MORE! $ NEEDHAMS SA -20 S /ALONE Authorized Distributor 699 JAVANCO INC. S 139 EETOOLS 1 GANG CB- SCANNERS 501 12th Avenue South CALL FOR) Nashville. TN 37203 $ 199 EETOOLS 4 GANG RCI -2950 MODIFICATION Manual $20.00 re- Only DEVICE (800) 528 -2626 Sales $ 159 SUNSHINE 4 GANG paid money order, $25.50 COD. Scott, PO Box (615) 244 -4444 Information L ISTS dl., to sealer. $ 399 SUNSHINE 8 GANG, 510408, St. Louis, MO 63151-0408. (314) G all lue tuloa flea rim your ele,uwk weds' Qunnr, (note feted. wet ,o,pne u,.,r.amo 846-0252. ,,,,,,, Cale $2499 STAG PP42 8 GANG S /ALONE nix.01 pan . wl acwr .Rlx.awl RI et We emote 4dfl,( General Device Instruments Rea,Ir eetwelowlwam u rompe. moment tuningo Owner nr eel ert1 p, nor eels moo parellet two (408) 241 -7376 Fax 241 -6375 CIRCLE 149 ON FREE INFORMATION CARD AUDIO-VIDEO- LASERS MUSIC VISION kit displays dynamic multicolor Lissajous patterns on any unmodified televisior, PROFESSIONAL SURVEILLANCE EQUIPMENT Mount Chip Component generated from any audio source. PCB and parts Surface $140.00 check, moneyorder. USA, Canada only. Used By Law Enforcement Agencies Prototyping Kits VHS demo tape $9.00. ELECTROKRAFT, dept. 13B, PO Box 598, Louisville, CO 80027. Only VHF -FM CRYSTAL CONTROLLED TRANSMITTERS BOLOS GAZETTE charter subscription $15.00. A - 139MHz, B - 139.970 MHz, C - 149 MHz, D - 149.450 MHz S4995 Quarterly publication. ELECTROPHOTONICS. Laser hacker related projects: first hologram, di- All kits assemble in less than 5 mins. ode lasers, meters, etc. HOLOGRAM with subscription. Send M.O. to HOLOS, 1450 Headon Road, Box 93113, Burlington, Ontario, L7M4A3, Canada. 1 i Ì SD -200 Smote CX-102 AD -700 AD -600 AD -500 AD-400 Detector Miniature Mir Mir Tel. Mir Camera Camera Range: Range: Range: Range. cc-1 Capacitor Kit contains 365 pieces 5 ea. of every 5 up .5 up 2.5 MISCELLANEOUS w /Audio w /Audio up to up to .5 to to 10% value from 1pf to .330f. CR -1 Resistor Kit contains 400 lines lines Mile Mile Mile Mile 240 1540 pieces; 10 ea. of every 5 %value from 1001010 meg0 .03 lux 2 lux Power Power Power Power ELECTRONICS WANTED 0805 and 1206. Each kit is ONLY $49.95 and 10-14VDC 7.14 V0( 750MW 15MW 15MW 400MW Sizes are 9330 $235 9247 9125 9115 9155 available for Immediate One Day Delivery! $100.00 FOR ideas. Taylor, Schrieber, Corey, Mr. Order by toll -free phone, FAX, or mail. We accept Wizard, McIntosh, like. Instit. scholarship award We sell a variety of cameras, bug detectors, night VISA, MC, COD, or Pre -paid orders. Company Pas winning. Send ideas to: Invention Millions, 3012 vision equipment, video transmitters, time lapse Call for free detailed Flax, El Paso, TX 79925. recorders, remote video monitoring systems, and accepted with approved credit. many more... brochure. CO!NMUNI ATIONS SPECIALISTS, INC A &D ELECTRONICS 426 West Taft Ave. r Orange, CA 92665-4296 Local (714) 998 -3021 FAX (714) 974 -3420 P 0 Boa 601, Monsey, NY 10952 liar REPAIRS -SERVICES 914 -356 -7541 Fax 914- 356 -7505 Entire USA 1 -800- 854 -0547 Call for FREE Cards accepted catalog. Credit WOOFER ROT? Quality re-coning, refoaming, restorations and parts for all speakers. Worlds largest speaker catalog, 200 pages $10.00. Tri - sus State Loudspeaker, 650 Franklin, Aliquippa, PA x$129" Laser -_: ' 15001. (412) 375-9203. Light Show I% This kit displays animation, text, draw-----K> ings, & music! Includes 2 Galvos, VCO, EDUCATION Computer Interface, Manual & Software list- NEW! ADAPT-11 microcontroller module plugs ing. Works from parallel printer port. The Pocket Programmer right into your solderless breadboard! Test -drive your 68HC11 designs instantly! Included software The portable Eprom programmer that and serial cable make it a breeze to program with Computerized uses the printer port of your PC instead any PC! Re- useable thousánds of times! Ideal for students, hobbyists and experimenters! Only Motors $39" of an internal card. The software has 24 $74.95! TECHNOLOGICAL ARTS, Suite 1704, Includes: 2 Stepper or 4 DC easy to use functions and programs 1644 Bayview Avenue, Toronto, ON M4G 3C2. servo motors, Computer interface kit, 32 page 27/25/28/68764 & Cmos from I6K FOR BEGINNERS, learn Elec. Tech. and or Corn - puter Repair. You can order either Elec. Tech./ training manual & Software listing. Works (2K x 8 )-2M (256K x 8) Eproms Computer Repair 101 or Computer Repair 101. from parallel printer port. (32 pin socket, UpGradeable to They come in a 4 tape set, each VHS tape Is R Add E5 for shipping. Compura and Lasa not included. 8Meg). Adapters available for MCU's, 2HRS. long. Taught at Occupational Center they cover some of the basics you need to know to start CaII for FREE Flyer 40 -Pin Eproms, 5 -Gang and Eprom a career. To order send a check or money order of Emulator 32K x 8. $49.95 (per set) to Mike Kolberg Productions, Box 1273 Industrial Pky. W#460 791, Valley, 91352. INTRONICS,)INC. e$Ú9.95 Sun CA sys P 0 Box 55125 Light & Box 13723 Add $3.00 for shipping. Motion Hayward CA 94545 -0125 Edwardsville, KS 66113 Add $3.75 for COD in kit form 510- 582 -6602 J (913) 422 -2094 Visa /Master Charge 136 BUY BONDS www.americanradiohistory.comAmericanRadioHistory.Com Countersurveillance Never before has so much The professional discussions seen on professional information on the art the TV screen in your home reveals how of detecting and eliminating to detect and disable wiretaps, midget electronic snooping devices -and radio -frequency transmitters, and other how to defend against experienced bugs, plus when to use disinformation to information thieves -been placed confuse the unwanted listener, and the in one VHS video. if you are a technique of voice scrambling telephone Fortune 500 CEO, an executive in communications. In fact, do you know any hi -tech industry. or a novice how to look for a bug, where to look for a seeking entry into an honorable, bug, and what to do when you find it? rewarding field of work in Bugs of a very small size are easy to countersurveillance, you must build and they can be placed quickly in a view this video presentation again matter of seconds, in any object or room. Today you may have used a telephone and again. handset that was bugged. It probably contained three bugs. One was a phony Wake up! You may be the victim of bug to fool you into believing you found a stolen words -precious ideas that would bug and secured the telephone. The sec- have made you very wealthy! Yes, profes- ond bug placates the investigator when sionals, even rank amateurs, may be lis- 1- 516- 293 -3751 he finds the real thing! And the third bug tening to your most private con- is found only by the professional, who versations. HAVE YOUR continued to search just in case there were Wake up! If you are not the victim, VISA or MC CARD more bugs. then you are surrounded by countless vic- AVAILABLE The professional is not without his tims who need your help if you know how tools. Special equipment has been de- to discover telephone taps, locate bugs, or what was to be an embassy and private signed so that the professional can sweep "sweep" a room clean. residence into the most sophisticated re- a room so that he can detect voice -acti- There is a thriving professional service cording studio the world had ever vated (VOX) and remote -activated bugs. steeped in high -tech techniques that you known. The building had to be torn Some of this equipment can be operated can become a part of! But first, you must down in order to remove all the bugs. by novices, others require a trained- coun- know and understand Countersurveilance tersurveillance professional. Technology. Your very first insight into Stolen Information The professionals viewed on your tele- this highly rewarding field is made possi- The open taps from where the informa- vision screen reveal information on the ble by a video VHS presentation that you tion pours out may be from FAX's, com- latest technological advances like laser - cannot view on broadcast television, sat- puter communications, telephone calls, beam snoopers that are installed hun- ellite, or cable. It presents an informative and everyday business meetings and dreds of feet away from the room they program prepared by professionals in the lunchtime encounters. Businessmen need snoop on. The professionals disclose that field who know their industry, its tech- counselling on how to eliminate this in- computers yield information coo easily. niques, kinks and loopholes. Men who formation drain. Basic telephone use cou- This advertisement was not written by can tell you more in 45 minutes in a pled with the user's understanding that a countersurveillance professional, but by straightforward, exclusive talk than was someone may be listening or recording a beginner whose only experience came ever attempted before. vital data and information greatly reduces from viewing the video tape in the pri- the opportunity for others to purloin vacy of his home. After you review the Foiling Information Thieves meaningful information. video carefully and understand its con- Discover the targets professional r tents, you have taken the first important snoopers seek out! The prey are stock CLAGGK INC. PE step in either acquiring professional help brokers, arbitrage firms, manufacturers, P.O. Box 4099 Farmingdale, NY 11735 with your surveillance problems, or you high -tech companies, any competitive a as a Please rush my copy of the Countersurveildance Techniques may very well consider career coun- industry, or even small businnesses in the Video VHS Cassette for a total cost of S53.95 each (which tersurveillance professional. same community. The valuable informa- includes 54.(5) postage and handling). tion they filch may be marketing strat- No. Of Cassettes ordered The Dollars You Save egies, customer lists, product formulas, Amount of payment S To obtain the information contained in manufacturing techniques, even adver- Sales tax (N.Y.S. only) Total enclosed the video VHS cassette, you would attend tising plans. Information thieves eaves- Bill my VISA MasterCard a professional seminar costing $350 -750 drop on court decisions, bidding Card No. and possibly pay hundreds of dollars more information, financial data. The list is Expire Date / if you had to travel to a distant city to m unlimited in the mind of man-es - Signature attend. Now, for only $49.95 (plus pecially he is a thief! Name if Address $4.00 P &H) you can view Countersue 2 You know that the Russians secretly City State ZIP veillance Techniques at home and take A installed countless microphones in the All payments in U.S.A. funds. Canadians add 54.(0 per VHS refresher views often. To obtain your concrete work of the American Embassy cassette. No foreign orders. copy, complete the coupon or call. 137 building in Moscow. They converted fr J www.americanradiohistory.comAmericanRadioHistory.Com ADVERTISING INDEX POPULAR ELECTRONICS magazine does not assume any responsibility for errors that may appear in the Index below. ADVERTISING SALES OFFICE Free Information No. Page Free information No. Page Gernsback Publications, Inc. 500-B BI- County Blvd. 164 3M Electrical /Electronic Products. 17 ITC Microcomponents Inc. 125 Farmingdale, NY 11735 1- (516) 293 -3000 - A &A Engineering 124 139 ITT Pomona 123 A &D Electronics 136 37 Jan Crystals 122 Larry Steckler, EHF/CET 25 Ace Communications 96 137 John Bell 121 President - Agrelo Engineering 127 JP Video 108 Christina Estrada 26 Alfa Electronics 104 51 Kasco Distributing 95 Assistant to the President 28 All Electronics 109 38 Kelvin Electronics 99 For Advertising ONLY Allen Engineering 118 Marrick Limited 133 518- 293 -3000 27 Alltronics 100 Marymac Industries Inc. 128 Fax 1-516 -293 -3115 151 AMC Sales 3 52 MCM Electronics 113 Larry Steckler Andromeda Research 126 MD Electronics 105 publisher - Antique Radio Classified 81 Mega Electronics 133 Arline Fishman 30 Bel -Merit 106 169 Mendelson's 120 advertising director 39 BG Micro 98 Mental Automation 117 Denise Mullen Bit Bangers 115 M &G Electronics 124 advertising assistant 168 B &S Sales 118 42 MicroCode Engineering 110 Kelly Twist 31 Caig Labs 101 Modern Electronics 133 credit manager CBC International Inc 80 Mondo- tronics 120 - C &C Electronics 128 NRI Schools 5 45 Subscription/ - C &C Specialties 128 Nu -Tek Electronics 80 Customer Service/ Order Entry - Cellsoft 124 43 Optoelectronics CV4 1-800 -827 -0383 CLAGGK Video 137 Percon 117 - 7:30 AM -8:30 PM EST Cleveland Inst. of Electronics 15 Phillips Tech 130 Command Productions 137 47 Prairie Digital Inc 116 ADVERTISING SALES OFFICES 166 Communications Electronics ... CV3 46 Print 114 Communication Specialists 136 150 Print 133 EAST /SOUTHEAST 149 Compco 136 Progressive Concepts 130 Consumertronics 122 Quarton USA 133 Stanley Levitan Eastern Sales 32 C &S Sales 102,103 Rattner North America 128 1 Overlook Ave. 162 Davis Instruments 19 The School of PC Repair 81 Great Neck, NY 11021 50 DC Electronics 131 The School of VCR Repair 81 1- 516 -487 -9357,1- 516 - 293 -3000 119 Design Computation 121 Self- Reliance Company Inc Fax 1- 516 -487 -8402 EDE 130 48 Sescom Inc 125 - Electronics Technology Today 119 Silicon Valley Surplus 136 MIDWEST/Texas/Arkansas/ - EMAC 121 Skyvision Inc. 111 Oklahoma. Colorado. Arizona Firestick II 81 Skyvision (Small) 128 Ralph Bergen 154 Foley -Belsaw 19 Software Science 130 Midwest Sales Spy Supply 112 - Forest Electronics 107 One Northfield Plaza, Suite 300 - Fotronics 127 Star Electronics 133 Northfield, IL 60093 -1214 - General Device Instruments 136 TAB Books 9 29 1- 708 -446 -1444 Genuine Electronics 113 Tandy National Parts 91 Fax 1- 708 -559 -0562 Get -Tech Inc. 115 130 Tech Sery 134 13 Global Specialties 25 Tele View Distributors 107 PACIFIC COAST/Mountain States 136 UCANDO Videos 116 - Grantham College of Engineering 11 Anita Bartman 130 United Electronic Supply 115 - Great Southern Security Hutch Looney & Assoc., Inc. - Greenleaf Electronics Inc. 113 US Cable (Zentek) 120 1800 North Highland Avenue Halcyon Group 116 US Cyberlab 95 Suite 717 155 Heath Company 7 Video Spectra 117 Hollywood, CA 90028 Information Unlimited 135 Weeder Technologies 124 1 -213- 462 -2700 Fax 1-213-463-0544 167 Interactive Image Technologies . CV2 Weka Publishing 129 - Intronics 136 West Coast Electronics 130 I/O Controls Corp. 120 Windward Electronics 126 - ISCET 93 World College (Div. of C.I.E.) 21 145 Island LogiX Inc 127 WPT Publications 128 138 ITC Instruments 97 134 Xandi Electronics 119 www.americanradiohistory.comAmericanRadioHistory.Com i`:o °°n ur °.Cellular Modifiable Scanners TIA NEWT RUM® WHS150 J CCOMMUNICATIONS List price $481.67/CE price $339.95 /SPECIAL. Shortwave 16 Channel 5 Watt VHF scanning transceiver Size: 2.45" Wide x 1.38" Deep x 6.4" High ICOM AH7000J super wideband discone type antenna ...... $99,95 ELECTRONICS INC. Frequency range:148.000 to 174.000 MHz continuous coverage. Grundig SateSt 7003 portable with 512 memory &AC adapt. 538995 Emergency Operations Will also work 144.000-148.000 MHz. with reducedperformance. Grundig Yacht Boy 400-J digital portable shortwave $199.95 Center The RELM WHS 150 is our most popular programmable five watt, Grundig Yacht Boy 230-J portable shortwave 5139.95 16 channel handheld transceiver with built-in CTCSS, which may Sangean A1S202J ultra compact 20 memory shortwave $79.95 New FCC Rules Mean last Buying be programmed for any 39 standard EIA tones. The full function, Sangean A1S606J ultra compact 45 memory shortwave $149.95 IYFMF compatible keypad also allows for DTMF Encode/Decode Sangean ATS606P9 shortwave with antenna & AC adapter $169.95 OpportunityforRadio Scanners and programmable ANI. Weighing only 15.5 oz., it features dealer Sangean A1S800J portable 20 memory shortwave $69.95 programmable synthesized frequencies either simplex or half Sangean AT5803AJ portable with SSB reception A AC adapter. $159.95 Recently, the FCC amended Parts 2 and 15 duplex in both 5.0 and 6.25 KHz. increments. Other features Sangean ATS808 -J portable 45 memory shortwave $159.95 of its Sangean include scan list, priority channel, selectable scan delay, selectable ATS818 -J portable without cassette recorder $189.95 rules to prohibit the manufacture and importation Sangean 5 watt/1 watt power levels, liquid crystal display, time -out timer ATS818tSJ with cassette recorder $209.95 of Sangean ANr60J portable shortwave antenna scanning radios capable of intercepting the 800 and much more. When you order the WHS150 from Communica- $9.95 MHz. cellular telephone service. tions Electronics Inc., you'll get a complete package deal including The Electronics antenna, battery, Communications belt clip and user operating instructions. Other Privacy Act prohibits the inten- accessories are available. A leather carrying case with swivel belt Weather Stations tional interception loop part #LCWHS is $49.95; rapid charge battery charger, part of cellular telephone transmis- Public safety agencies responding BCWHS is $69.95; speaker /microphone, part SMWHS is $54.95; to hazardous materials incidents sions. Supplies of scanners must have that are capable of being extra ni-cad battery pack, part 'BP007 is $59.95. The radio accurate, up-to-date weather information. The Davis modified to receive full 800 MHz. coverage such as technician maintaining your radio system must order program- Weather Monitor H is ow- top-of-the-line weather station which ming instructions part combines essential weather monitoring functions the Bearcat 200XLT and 2500XLT A'PI150 for $18.00 to activate this radio. into one incredible are in very short package. Glance at the display, and see wind direction and wind supply. If you need technical assistance or recom- Bearcat® 8500XLT-J speed on the compass rose. Check the barometric trend arrow to see if the pressure is rising or falling. mendations to locate a special scanner or solve a List price $689.95/CE price $369.95 /SPECIAL Our package deal includes the new high resolution 1 /100 communications 500 Channels 20 banks Alphanumeric display inch rain collector part 7852J,and the problem, call the Communica- external temperature/humidity sensor, part 07859 The package Turbo Scan VFO Control Priority -J. tions Electronics Inc. technical support hotline channels deal is order #DAVI J for $ 524.95 plus $ 15.00 shipping. If you have Auto Store Auto Recording Reception counter a personal computer, when you order the optional Weatherlink for $2.00 per minute at 1- 900 -555 -SCAN. Frequency step resolution 5, 12.5, 25 & 50 KHz. computer software for S149.95, you'll have a powerful computerized weather station at an incredible price. Size: 10-1/2" Wide x 7 -1/2" Deep For the IBM PC or equivalent x 3 -3/8" High order part #7862-j. For Apple Frequency Coverage: Mac Plus or higher including Quadra Radio Scanners or PowerBook, order part #7866 -J. 25.000 - 28.995 MHz. (AM), 29.000 - 54.000 MHz. (NFM), 54.000 - 71.995 MHz. Bearcat® 2500XLT-J (WFM), 72.000 - 75.995 MHz. (NFM), 76.000 - 107.995 MHz. (WFM), 108.000 - 136.995 MHz. (AM) List price Other neat stuff $649.95/CE price $339.95 /SPECIAL 137.000 - 173.995 MHz. (NFM), 174.000 - 215.995 MHz. (WFM), Uniden EXP9200.J 400 Channels 20 Banks Turbo Scan 216.000 - 224.995 MHz. (NFM), 225.000 - 399.995 MHz. (AM) 900 MHz. 2 line cordless phone ....._ ...... __ 5289.95 Uniden EXP9100J 900 MHz I line cordless phone _. 400.000 - 511.995 MHz. (NFM), 512.000. 549.995 MHz. (WFM) ...... 5269.95 Rotary tuner feature Auto Store Auto Sort Cobra CP9103 900 MHz spread spectrum cordless phone ...... 5249.95 760.000 - 823.9875 MHz (NFM), 849.0125 - 868.9875 MHz (NFM) ICOM GP22-J Size: 2 -3/4" 'Wide x 1 -1/2" Deep x 7 -1/2" High handheld global positioning system ...... _.._ __... 5699.95 894.0125 - 1,300.000 MHz. (NFM). WR200 weather radio with storm alert...... _.... . $39.95 Frequency Coverage:25.0000 - 549.9950, 760.0000 - 823.9950, RUM WHS150J VHF The new Bearcat 8500XLT gives you pure scanning satisfaction handheld 5 watt, 16 ch. transceiver...... __...... $339.95 849.0125 - 868.9950, 894.0125 - 1,300.0000 MHz. RELM RH256N8 -J VHF 25 watt synthesized transceiver...._.__ with amazing features like Turbo Scan. This lightning ._...5289.95 -fast tech- Ranger RCI2950J 25 watt 10 meter ham radio ...... _.. __. Signal intelligence experts, public safety agencies nology featuring a triple 5244.95 and conversion RF system, enables Uniden's Ranger ß029701 100 watt 10 meter ham radio ...... 5369.95 people with inquiring minds that want to know, have best scanner to scan and search up to 100 channels per second. Uniden LRD9000WIJ Super Wideband Laser/Radar Detector...... 5169.95 Because the frequency coverage is so large, a very fast scanning HCPC J HaniCall CD Rom for BM PC by Buckmaster Publishing ...... $39.95 asked us for a world class handheld scanner that can PWB-J Passport to Worldband Radio by IBS system Is essential to keep up with the action...... 510.95 Other features POLL J Police Call for CT, ME, MA, NH, NY, RL VF intercept just about any radio transmission. The new include VFO Control - (Variable ... $5.95 Frequency Oscillator) which POL2 J Police Call for DE, MD, NJ, PA ...... _. 55.95 Bearcat 2500XLT has what you want. You can program allows you to adjust the large rotary tuner to select the desired POL3-J Police Call tor Michigan & Ohio ...... _. $5.95 frequency or channel. Counter Display - Lets you count and P01.43 Police Call for IL, IN, KY, WI ...... _. $595 frequencies such as police, fire, emergency, race cars, POL5.3 record each channel while scanning. Police Call for IA, KS, MN, MO, NE, ND, SD ...... _. 55.95 Auto Store - Automati- POL6J Police Call for DC, FI, marine, military aircraft, weather, and other broadcasts cally stores all active frequencies GA, NC, PR, SC, VA, WV ...... _. $5.95 within the specified bank(s). PUL7 J Police Call for Al, AR, LA, MS, OK, TN, TX ...... _. $5.95 into 20 banks of 20 channels each. The new rotary tuner Auto Recording - This feature lets you record channel activity feature from the scanner onto a tape recorder. You can even get an POL9J Police Call for California, Oregon & Washington ...... $5.95 enables rapid and easy selection of channels and ANT&J VHF scanner/VHF transmitting optional CTCSS Tone Board (Continuous Tone Control Squelch antenna PL259 connector ...... $2995 frequencies. ANTMMBNCJ magnet mount scanner antenna w/ BNC With the AUTO STORE feature, you can System) which allows the squelch connector .....$29.95 tole broken during scanning ANTMMMOTJ magnet mount scan antenna w/Motorola plug ...... $29.95 automatically program any channel. You can also scan all only when a correct CTCSS tone is received. 20 banks - Each AMMMPL-J magnet mount scan antenna with PL259 connector ...... $29.95 400 channels at 100 channels -per- bank contains 25 channels, useful for storing similar frequencies ANTSGBNCJ glass mount scanner antenna with BNC connector ...... $29.95 second speed because ANISGMOT.J glass mount scanner antenna with in order to maintain faster scanning cycles. For maximum Motorola Jack ._... . $29.95 the Bearcat 2500X11 has TURBO SCAN built-in. To make scanning enjoyment, order the following optional accessories: this scanner even better, the BC2500XLThas AUTO SORT PS001 Cigarette lighter power cord for temporary operation Buy from your with confidence) - an automatic frequency sorting feature for faster vehicle's cigarette lighter $14.95; PS002 DC power cord - enables permanent operation from your vehicle's scanning within each bank. Order your scanner from fuse box It's easy to order from CM. Mail orders to: Communications Ca $14.95; MB001 Mobile mounting bracket S 14.95; BC005 CTCSS Electronics Inc., Emergency Operations P.O. A modification sheet with instructions to restore full Tone Board $54.95; EX711 External speaker with mounting Center, Box 1045, Ann Arbor, Michigan 48106 U.S.A. Add $15.00 per radio for 800 MHz. coverage bracket & 10 feet of cable with plug attached $ 19.95. The for the Bearcat 2500XLT or Bearcat U.P.S. ground shipping and handling in BC8500XLT comes with AC adapter, telescopic antenna, owner's the continental U.S.A 200XLT may be ordered for unless otherwise stated. Add $8.00. To order any Bearcat manual and one year limited warranty from Uniden. Order your $8.00 shipping for all accessories and publications. Add $8.00 shipping per radio product call 1- 800 -USA -SCAN. BC8500XLT from Communications Electronics Inc. today. antenna. For Canada, Puerto Rico, Hawaii, Alaska, P.O. Box, or APO/FPO delivery, Great Deals on r shipping charges are two times continental U.S. rates. Michigan residents add state sales tax. No COD's. No returns or ex- Bearcat Scanners changes after 15 days. 10% surcharge for net 10 billing to -11 n toto® qualified accounts. All sales are subject to availability, accep- Bearcat 8500XLT-J base /mobile $369.95 bmb tance and verification. Prices, terms and specifications are I óR R subject to change Bearcat óó® without notice. We welcome your Discover, 890XLT J base /mobile $244.95 Visa, American Express or MasterCard. Call 1- 800 -USA =SCAN to Bearcat 2500XLT-J handheld$339.95 order toll -free. Call 313-996-8888 if outside the U.S.A. FAX CB anytime, dial 313-663-8888. For technical assistance to Sportcat 150-J handheld /GMRS Radios solve your communications problem, call the Communi- $199.95 cations Electronics technical support hotline for $2.00 The Uniden GMR100 is a handheld Bearcat 760XLTJ GMRS UHF 2 -way radio per minute at 1- 900-555 -SCAN. Order your new electronic base /mobile $199.95 transceiver that has these eight frequencies installed: 462.550, equipment from Communications Electronics Inc. today. Bearcat 700A -J 462.725, 462.5875, Scanner Dbaibudon Center and cu logos trademark, of Communications Electronic, Inc info mobile $149.95 462.6125, 462.6375, 462.675, 462.6625 Sak dates 5/094 Iw3094 AD ro]a94GmCopyright o 1994 Communkn,on, ne,ovmo Inc and 462.6875 MHz. This Bearcat 560XLA J base /mobile .... $84.95 one watt radio comes with flexible rubber antenna, rechargeable ni-cad battery, AC adapter/ For credit card orders call Bearcat 220XLT-J handheld $229.95 charger, belt clip, F.C.C. license application and more. Bearcat 200XLT -J handheld $199.95 Cobra 2000GTL-J SSB Deluxe CB Base $389.95 1-800-USA-SCAN Uniden GMR100 -J GMRS Handheld $159.95 Bearcat 148XLT-J base/WX alert . $88.95 Communications Electronics Inc. Uniden WASHINGTON -J SSB CB Base $189.95 Bearcat 120XLT J handheld Emergency Operations Center $159.95 Uniden GRANTXL -J SSB CB Mobile $139.95 Bearcat P.O. Box 1045, Ann Arbor, Michigan 48106 -1045 U.S.A. BCT2-J info mobile $139.95 Uniden PR0538WJ CB & Weather $59.95 For Information call 313-996-8888 or FAX 313 -663.8888 CIRCLE 166 ON FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com MMO.Isseri OPToSX56 50 Channels Per Second!!! system OptoScan 456 costs less than any other computer aided scanning Star" and is supported by all the best software packages including Scan Shack and Scan Cat". OptoScan 456 uses the highly regarded Radio Pro 2005 and Pro 2006 VHF/UHF scanners. These popular receivers with the 05456 package installed becomes: The New Standard -The OptoScan 456. CTCSS & DCS Controlled Scanning and Logging DTMF Decode & Log with Channel and Time PC Software for computer Log, Scan & Search RS-232C & CI -V Interface No Drill or Solder Installation Output for signal level and spectrum display Why Computer Controlled Scanning? The computer makes the scanner the computer perform, simply and effortlessly. Even when you are not around, -virtually can continue to search out frequencies you want and record them unlimited numbers. Why Decode CTCSS tones and DCS codes? The 0S456 decodes Monitoring tones, codes and touch -tone characters to provide the Radio and accessing a Enthusiast with a powerful new tool in sorting out who is talking, make the PRO-2006 repeater. Optoelectronics has produced the OptoScan 456 to for any price! family radios perform to a new standard that no one else can match controller board, mounting Complete Installation Kit, Model 0S456, includes the assembled and tested basic software for the PC and the installation video $299. hardware (no soldering or drilling required), cables, OptoScan 456 from our distributors: Complete Optoscan 456 and modified Pro-2006 are available TX; E.E.B., 1-800- 368-3270 VA. Grove Ent, 1.800438.8155, NC; Marymac Ent, Inc., 1-800-231-3680, CTCSS: 85.4` Hz 305;'712050 ^Mir% Elm rArTr1k0%- 4004F DTttF: Vl VI= Lis %. I\V11 r `JI tunes VHF/UHF receivers equipped above) 5riiModel 25 Electronic Equivalent Reaction DC440 Decoder (pictured of Forward with CI -V serial communications interface. with New CI -V Interface Reconnaissance Exdusive Optoelectronics Digital Filter/Capture If you are into UHFNHF communications monitor- New Frequency Scout Technology peed ) The Remarkable (pat ing then you will want to add a DC440 to your finds and records frequencies frequencies automatically 50 Memory Locations for unique system. This popular decoder has been upgraded will tune a receiver. for later use and 250 Hit Counter for each frequency in memory with a new communications interface port that is The Scout is pocket size-ready to go Reaction tunes OptoScan 456 CI -V CI -V compatible. Now you can take advantage of tones and anywhere, and, unlike a frequency counter, Communications receivers the new scanning software that supports between random If are using an R7100 or R7000 receiver the Scout can differentiate Selectable annunicators include vibrator, codes you transmissions. DC440 will connect to either the CT17 or noise and coherent RF beeper and EL back lit display then the walk -by situations CX12 RS-232C Convertor for single serial port use. It is ideal for surveillance Can be interfaced to a PC for data logging built -in vibrator to off the air detection of 50 CTCSS with a using OptoLog Software Simultaneous alert you a frequency was tones, 106 DCS codes and 16 DTMF characters 16 Segment RF signal level bargraph for recorded. measurement modes for maximum flexibility relative signal level detection Six For drive -by applica- ten character display of up to 127 10MHz to 2.8GHz single frequency range. Scrollable tions, a beeper lets you stored DTMF characters Six+ hour battery life-one hour rapid charge know when a new frequen- front panel controls for Power, Mode x 1.2" D Convenient or an already Pocket Sized: 3.7" H x 2.75" W cy is found and Recall recorded frequency is hit. The DC440 with CI -V Interface $259. Up to 250 hits can be The Scout Model 25 with rapid Charge and NiCad 44 (Optional Internal NiCad counted on each of the 50 high capacity NiCad batteries $399. battery pack) $ 39. frequency memories. Scout is pictured with optional DB32, dual band, VI-IF/UHF miniature antenna $ 29. CX1 2 CI -V to RS -232C Interface Converter Low cost convertor for CI -V logic level data to RS -232C for connection to a Personal Computer serial port. The CX12 is fully equivalent Optoelectronics, Inc. to the Icom CT -17 convertor. 305- 771 -2050 5821 NE 14 Avenue. Ft Lauderdale, FL The CX12 is an accessory for the Optoelectronics Master Card, C.O.D., Cash or Money 33334 Visa, $89. Order. Shipping Charges Additional. DC440 and Model 25 Scout. Price: All specifications 8 prices are subject to CARD change without notice or obligation. CIRCLE 43 ON FREE INFORMATION www.americanradiohistory.comAmericanRadioHistory.Com