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Popular Onics ElectrJanuary 1995 Popular onics Simulator Use iTO est te ep ones, answering machines, Fax machines, and more LINE 2 Ji i PDT ilweather,. frequ *00.and oth7ittormalion 40111110r. the rm and #EIXBDCCH CAR -RT SORT xx 0024 and mellf J\J"ji of our classic #60506DHM9970A006* FEE95 P37 eas ¡id vaoutim-tube am ROBERT DANN RESP AURORA D www.americanradiohistory.comAmericanRadioHistory.Com "Electronics Workbench - As an affordable tool for performing design trade-offs, you can't beat it" MA. Chapman Oceanside, California Electronics Workbench gives you the freedom to quickly translate your design concepts and specs into a workable circuit. Fine tune &artlessly. Play what if scenarios. And monitor the circuit response. The simulated components and test instruments work just like the real thing. .a. u. csu. 1..... w 1111=111 Ri `i°i+ . .., . aF,. a ill - D iÌII F á 11 t> 1-. C MI ar,. g) _-__._- _.. C 1i1Fw ,e wr,r,- File Edit Circuit 'indo.. Help 9110* 6wtr-rf.ca3 TTTjj iu ótóób óóóòdtóó...E j Digital Module: Analyzing a logic circuit 23-F With a full complement of professional test 1000 instruments and an unlimited supply of components,it's the ideal proving ground for your design concepts. Electronics Workbench puts you in control. Guaranteed!* I---,ilotter The standard tier simplicity and power for over MODE MAGM=TO-IPHiSEI six years, Electronics Workbench is the most VERTICAL i0tI20MTiL 1LOGlLIHI ILJG1LIrI popular tool of its kind. It has gained E 8 dB 11 F1 e 1 GI_ it{ worldwide acclaim as the ideal complement /-120 dB 4 0 0 M4, -ti to any test bench. © i- 23 dB Fact: Over 90% of our ` Oa K2 I e OMM- j customers recommend it to their + / ` . 2H . [UT w... friends and colleagues. Analog Module: Tuning an RF front end. Electronics Workbench Electronics Workbench' The electronics lab in a compiterTM Call: 800 263 -5552 INTERACTIVE IMAGE TECHNOLOGIES LTD. 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INTERACTIVE CIRCLE 167 OH FREE INFORMATION CARD www.americanradiohistory.comAmericanRadioHistory.Com JANUARY 1995 Vol. 12, No.1 A Popular Electronics GERNSBACK TPUBLICATIONCATION 1 C O V E R S T O R Y 31 Build a Telephone-Line Simulator A complete telephone- system -in -a -box; you can use this telephone - line simulator to test telephones, Fax machines, answering machines, and more, or set up your own simple two- station phone system - Thomas E Black C O N S T R U C T I O N 49 Build a Simple WWV Receiver Page 9 Get time, weather, frequency, and other information whenever you need it -Brian McKean 53 Build a Vacuum -Tube Audio Amplifier Experiment with the warm sound of vacuum -tube audio without putting a dent in your wallet -Larry Lisle F E A T U R E S 40 A DX Beam -Aimer Program Page 31 Accurately aim your beam antenna with this easy -to -use program - Fred Blechman 45 A Hobbyist's Guide to Surface -Mount Technology The information, tools, techniques, and parts sources you need to make working with surface -mount components easier than you ever imagined -Ronald A. Reis 56 Popular Electronics 1994 Annual Index Your guide to a year of electronics information, projects, and fun Page 53 Gernsback Publications, Inc. 500 -8 Bi- County Boulevard, Farmingdale, NY 1735. Second- POPULAR ELECTRONICS (ISSN 1042 - 170 -XI Published monthly by One -yea twelve issues, subscription rate U.S. and possessions $21.95, Canada Class postage paid at Farmingdale. NY and at additional mailing offices all other countries $29.45. Srbscription orders payable in U.S. $28 84 (includes G.S.T Canadian Goods and Services Tax Registration No. R125166280) Inc. All rights U.S single copy price $3 50.0 1994 by Gernsback Publication:, funds only, International Postal Money Order or check drawn on a U.S. bank Canada by Gernsback Publications, Inc Popular Electronics trademark is reserved Hands -on Electronics and Gizmo trademarks are registered in U.S and is licensed' o Gernsback Publications, Inc. Printed in U.S.A. registered in U.S and Canada by Electronics Technology Today, Inc. and Box 338, Mount Morris, IL 61054 -0932 Postmaster: Please send address changes to Popular Electronics, Subscription Dept.,' O and artwork or photographs if thei return is desired should they be A stamped self -addressed envelope must accompany all submitted manuscripts /or artwork or photographs while in oir possession or otherwise. rejected We disclaim any responsibility for the loss or damage of manuscripts and/or or information relating to newsworthy products, tecmiques. and scientOic and techno- As a service to readers, Popular Electronics publishes available plans materials and workmanship used by readers, Popular Jectronics dis- logical developments. Because of possible variances in the quality and condition of this magazine. functioning of reader -built projects based upon or from plans or information published in claims any responsibility for the safe and proper 1 www.americanradiohistory.comAmericanRadioHistory.Com J A N U 1 A R Y 9 9 5 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 9 Gizmo EDITORIAL DEPARTMENT Apple Computer Newton MessagePad, Oldsmobile Aurora with Carl Laron, editor Dan Karagiannis, associate editor Bose Audio System, California Audio Systems CD Player, and Teri Scaduto, assistant editor much more Evelyn Rose, editorial assistant Marc Spiwak, editorial associate 24 Hands -On- Report Joseph J. Carr, K4IPV, contributing editor Elenco Electronics Telephone -Line Analyzer Marc Ellis, contributing editor Jeffrey K. Holtzman, contributing editor C O L U N S M Don Jensen, contributing editor Marc Saxon, contributing editor 6 Multimedia Watch John Yacono, contributing editor This and that -Marc Spiwak PRODUCTION DEPARTMENT Ruby M. Yee, production director 28 Think Tank Karen S. Brown, Temperature -controlled projects -John Yacono production manager Kathy Campbell, production assistant 64 Antique Radio Tel -Ohmike wrap -up -Marc Ellis ART DEPARTMENT Andre Duzant, art director 68 Computer Bits Russell C. Truelson, illustrator Buy or upgrade? -Jeff Holtzman Jacqueline P. Cheeseboro, circulation director 71 Circuit Circus Michele Torrillo, More ultrasonic circuits - Charles D. Rakes POPULAR ELECTRONICS bookstore BUSINESS AND EDITORIAL 75 DX Listening OFFICES Gernsback Publications, Helping out the newcomers -Don Jensen Inc. 500 -B Bi- County Blvd Farmingdale, NY 11735 77 Ham Radio 1- 516.293.3000 FAX: 1 -516- 293.3115 A step -attenuator project -Joseph J, Carr President: Larry Steckler SUBSCRIPTION CUSTOMER SERVICE/ 82 Scanner Scene ORDER ENTRY Monitoring VIP military aircraft -Marc Saxon 1. 800 -827.0383 7:30 AM 8:30 PM EST D E P Advertising Sales Offices A R T M E N T S listed on page 126 3 Editorial Composition by Motes Graphics Cover by Loewy Design 4 Letters Illustration by Kerry Kehoe 80 Electronics Market Place AB ABC 84 Electronics Library AUDITED 86 New Products 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 126 Advertiser's Index of such patents by the making, using, or selling of such equipment or circuitry, and suggests that anyone interested in 127 Free Information Card such projects consult a patent attorney www.americanradiohistory.comAmericanRadioHistory.Com SURVEILLANCE & SECURITY FM TRANSMITTERS MINI (KITS) 3 -VOLT FM XMTR, up to 300 ft. indoors. 1500 ft. outdoors EDITORIAL PHONE XMTR, range to 500 ft., uses phone -line power Sound -Activated XMTR, range to 500 ft. 2 -STAGE XMTR, 9-Volt, very powerful All above require simple soldering at 2 to 4 places. $29.95" HOBBYISTS AND SMT TELE CALL FORWARDER. Transfers incoming calls. $99.00` CALLER ID. Registers incoming number. By now, most readers of this magazine are familiar with $99.00' in electronics assembly called "Surface - TEL REGISTER WITH PRINTER. Records dialed the revolution number, duration, and prints record. $169.00' not, and if you are like Mount Technology." If you are TEL REGISTER W/O PRINTER. Records dialed most hobbyists, let me tell you now that you are going to number 8 time. 16 -digit display. $99.00` 12 -HOUR LONG -PLAY RECORDER. Modified hate it. Panasonic. Records 6 hrs. on each side of 120 tape (supplied). Compatible with VOX and Tel assembly of electronics Rec Adapter. $119.00* Developed to make automated VOX VOICE-ACTIVATED SWITCH. Makes re- devices and products easier, quicker, and more reliable, corder self- activating with voices or other sounds. $28.50** is a manufacturer's dream - surface -mount technology TELE RECORDING ADAPTER. Records come -true, but can be a hobbyist's nightmare. PC- incoming and outgoing calls. $28.50* holes, tiny rice -grain -sized components, TELEPHONE SCRAMBLERS. Over 4,000 boards without separate codes. $199.00' just some of and ultra- compact component spacing are VOICE CHANGER. Changes man's voice to the "features" of SMT. Add to that the fact that many sur- lady's and vice versa. $49.00'" For Shipping & Handling add .$5.00 and "$2.00 per item. are available only on reels or in Colo. residents add sales tax. Mail Order, VISA, M /C, COD's face -mount components o.k. Inquire for dealer prices. Free catalog. it's almost strips, and not in quantities of one or two, and MUCH. MUCH MORE - OUR 25TH YEAR! enough to drive one to take up knitting instead.
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