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lOW TO USE TV TEST PATTERNS JUNE 1961 35 CENTS f' MAC fi Ruiiding Plans for: , 5 Transistorized e Heart Monitor 1 ;r Moisture Meter . - for Gardeners 1ao0 ,. ° _.o Underwater Fish Caller Magnetic Coin Tosser _aplNpal Musical Telephone Holder CB to Ham Band Transceiver Loudspeaker Metronome AmericanRadioHistory.Com This is developed by CADRE INDUSTRIES CORP. for the 27 =Mc CITIZENS BAND OPERATION - P These CADRE units are built to the highest standards of-the electronics industry, by a company that has oeen long estab- fished -as a prime manufacturer of precision electrónic research equipment and computer assemb ies. CADRE trans- ceivers are 1000/0 transistorized - compact= lightweight .. erngineérea for unparallelec performance and reliabilitya The CADRE 5 -Watt Transceiver, at 5199.95,_for example, for offices, hcrñes, cars, trucks, boats, aircraf:,`etc., measures a mere 11 x 5 x 3", weighs less than 6 pcundsgNev^ertheless, it cffers 5 crustal -controlled transmit/reoeive cñannels (may be used on all 22), and a range of 10 miles on lard, 20tover water! The CADRE 100 -MW Transceiver, $124.95,_fits.intoa shirt pockett Weighs 20 ounces, yet receives and -transmits onany of"the 22 -channels'... effidiently, cleárly without- annoy - noise. A perfect "pocket telephone"l - For the tikne being it is unlikely thatt there' will; be 'enóugh CADRE transceivers to meet all the demand Obviously,;our dealers cannot restrict their sále to the f-ellds cf medicine, agriculture,, transpdrtation,',municipa`lg serv:ces,z etc' How- ever, si'nce'these CADRE units were :engiraeereclfor _prófes- sianal and serious commercial.'applicátions;-and cost r lore than ordinary CB tlansceivpis- we t elieve that as "water finds its own level," CADRE transceivers will, for the most part, find then' wáy into the hands of=thosefyvhoreally need them. Write for complete illforma'tion and detailed 3, e!(iieations. é `C".cnR ª .._ . t: '\; e - . CADRE IÑDUSTRIES CORP., Endicott, N.Y. Prices appearing iº this advertisement lire sygnes!eté -retar1 prices AmericanRadioHistory.Com New G -E Profitable Service Management Course tells... HOW TO INCREASE YOUR BUSINESS, MAKE MORE MONEY BY PROVEN EFFECTIVE METHODS Are you making as much money as you should? Charging enough for service calls? Paying more in taxes than you should? How can you protect against stock pilferage, overstocking, understocking? Overdue bills a problem? ... Get- ting your share of new business? Is your personal selling and advertising as effective as it could be? How about special offers, seasonal promotions? How many TV and radio homes are in your county? Find the answers to these and hundreds of other problems that affect your everyday business, in General Electric's new Profitable Service Management Course. A com- plete business management and development program specially prepared for TV and radio service dealers. Learn step by step how to assure a satisfactory profit margin, increase business with methods proved successful by service dealers from coast to coast. Four-part program includes: 1 "Sound Business Practices," an 85 - 3 "Sounds of Success," 33/ LP rec- page manual which will help you set up ord reveals the secrets of operating a a successful business or increase your profitable electronic service center as told present business. 17 topics in 4 chapters: by successful dealers. Business For Profit Planning Your 4 Workbook for checking your ac- Business Organizing Your Business quired knowledge, prior to receiving your Controlling Your Business Management Award Certificate. 2 "Selling Electronic Service," a 57 - This is not a get -rich -quick course-not page guide to increased sales through an electronics course, but a down-to- modern advertising, sales promotion and earth guide for turning your technical merchandising techniques. 14 topics in skills into more business and profits. It's 3 chapters: Attracting New Customers easy to study; complete; prepared by Promoting Your Business Keeping experts; handsomely packaged for your Customers Satisfied bookshelf. GENERAL ELECTRIC Send for your Profitable Service Management Course today!- GENERAL ELECTRIC COMPANY, DEPT. B, 3800 N. Milwaukee Ave., Chicago 41, Illinois Please ship prepaid: ETR 2202 Profitable Service Management Course, $12.50 each, or $10.00 plus 10-GBQ6G-A or GTB G -E tube carton tops. My check or money order ís enclosed for the required amount plus any sales or use tax applicable in my area. Name Address City Zone Stale POPULAR ELECTRONICS is nublishetl monthly by Ziff -Davis Publishing Com.:any, William It. Ziff. Chairman of the Boats (1940- 1953). at 434 S. Wabash Ave.. Chicago 5 Ili. Second -Class postage I aid ai Chicago. Illinois. Authorized by Post Office Department. Ottawa. Canada, as second-class matter. SUBSCRIPTION RATES: One year U.S. and possessions, and Canada S4.00: Pan-American Union lbuniri es .$4.50. all other foreign countries. $5.00. AmericanRadioHistory.Com POPULAR JUNE 1961 1FF-DAG4 r_,ELECTRONICS ;- VOLUME 14 NUMBER 6 C,° POPULAR ELECTRONICS Is Indexed in the Readers' Guide to Periodical Literature Special Feature The Zener Diode R. J. Shaughnessy 76 Electronic Construction Projects Listen to Your Heart Edward Lininger 47 Heads or Tails? ... Harold P. Strand 51 Transistorized Metronome Norman Latner 54 Musical Telephone Holder Herbert Friedman 71 Electronic Fish Caller James J. Bucher 74 Soil Moisture Meter Ronald Wilensky 85 AC/DC Electronic Load Harold Reed 89 Transistor Saver George E. Lang 90 Storage Battery Tester I. C. Chapel 92 Low-Power/High-Power Relay Herb S. Brier, W9EGQ 95 Audio and High Fidelity Hi -Fi Showcase 18 Tuner Kits Come of Age 56 Tape Speeds-Then and Now Richard A. Flanagan 67 Your Connections are Important Jim Kyle, KSJKX/6 73 First Mike Kit 91 Amateur, CB, and SWL CB Rig Goes "Ham" Edward M. NoII, W3F0J 64 On the Citizens Band Tom Kneitel, 2W1965 87 -Wave Short Report: False Reporting Hank Bennett, W2PNA 83 Short -Wave Monitor Certificate 84 Across the Ham Bands: How to Avoid Violating Regulations.. Herb S. Brier, W9EGQ 93 Electronic Features and New Developments POP'tronics News Scope 6 They'll Fly Safely Ken Gilmore 41 Interpreting TV Test Patterns J. K. Locke 59 Space Electronics Oliver P. Ferrell 68 Transistor Topics Lou Garner 96 Carl and Jerry: First Case John T. Frye, W9EGV 99 Departments Letters from Our Readers 10 POP'tronics Bookshelf 24 New Products 30 Tips and Techniques 36 Index to Volume 14 (Jan. -June, 1961) 124 Copyright © 1961 by ZIFF-DAVIS PUBLISHING COMPANY. All rlahts reserved. 2 POPULAR ELECTRONICS AmericanRadioHistory.Com THIS COULD HAPPEN TO YOU...UNLESS THE KIT YOU BUILD IS A PACO COMPARE THESE PACO FEATURES: No mistaken identity or endless searching. Step-by-step instruction book makes assembling a Paco Kit Parts are clearly pictured and labeled; re. foolproof! Paco gives you giant, foldout diagrams on correspond- sistors are neatly mounted and identified! ing instruction pages so you can see both at the same time. 41) PACO Model SA -40 STEREO KIT PACO Model C25 PREAMP-AMPLIFIER IN -CIRCUIT CAPACITOR TESTER KIT Assemble a superb home music system PACO Model DF -90 with this true 40 watt stereo preamp- Reveals out, shorted, or open elec. dried amplifier. flexibility. less than trolytics-in the circuit-with Paco's ex. TRANSISTORIZED DEPTH FINDER KIT Unmatched distortion, and handsome design elusive Capacity Dial. Instantly finds open Protect your boat against shoals and 0.5% or direct shorted capacitors without re- underwater hazards with this compact, make this thr ideal component for music moving from circuit. Great time saver! easy -to -read depth finder. Transistors pro- lover and audiophile alike! Specifications: long battery life, provide utmost accuracy Specifications: and potability. A boon to fishermen- SIMPLE SEQUENTIAL TEST: reveals open or MUStC WAVEFORM POWER OUTPUT: 25 watts per shorted capacitors, including electrolytic types. locates hard -to -find schools of fish. A low cost safety device for every boat owner. channel (50 watts tota0. ELECTROLYTIC DIAL: indicates actual electro' RESPONSE: 30 cps to 90Kc, ± lytic values while capacitor is in -circuit; any Specifications: 1.0% db electrolytic which yields a capacity reading on HARMONIC DISTORTION: less than 0.5% at 20 revealed as not FULLY TRANSISTORIZED: 5 transistors, with a Electrolytic Dial is automatically watts per chanrel output. open or shorted. low battery drain for extremely long battery life. ELECTROLYTIC TEST: indicates in -circuit electro HIGH INTENSITY INDICATOR: for sensitive, accu. Model SA -40: Kit, complete with black and gold rate response under all conditions. lytic capacity from 2 mid to 400 mfd In two case and PACO -detailed assembly -op era ling ranges; condenser is automatically proved non. FAST, EASY READINGS: made possible by means mam.al Kit Net Price: $79.95 shorted and not open if Capacity Reading can of oversized scale calibrated at one -foot inter. be obtained. vals from 0 to 120 feet. Model SA40W: Factory.wired, wlth black and gold case, ready to operate. Net Price: $129.95 Model C.25: Kit, complete with PACO -detailed Model DF -90: Kit, complete with PACO -detailed assembly -operating manual. Kit Net Price: $19.95 assembly -operating manual. Kit Net Price: $84.50 Model C25W: Factory.wired, ready to operate. Model OF90W: ractory-wired, ready to operate. Net Price: 29.95 Net Price: $135.50 r 1 Paco Electronics Company, Inc., Dept. PEN 70-31 84th Street, Glendale 27, E. I., N. Y. Please send me your complete Illustrated catalog. PACO Name KITS BY Address FREE! COMPLETE ILLUSTRATED CATALOG Mail this coupon for the complete Paco catalog of electronic equipment kits, City Zone........ State including test instruments, measuring instruments, and high fidelity components. erucoeenrues, roe. loon va.COTraON,C9 V June, 1961 3 AmericanRadioHistory.Com .. POPULAR. Publisher PHILLIP T. HEFFERNAN ELECTRONICS Editor OLIVER P. FERRELL, 2W1665 World's Larc est-Selling Electronics Magazine Managing Editor Average Net Paid Circulation Over 357,000 JULIAN M.
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