Radio-Electronics TELEVISION SERVICING HIGH FIDELITY How to Fix Radios Faster and Better Hi-Way FM The Easy Way Simple Sweep Gen Uses Varicap Build a COMPUTER for SPORTS CAR au (.-)S41 %E.V OtZ9 RALLIES- See Page 46 Hsaam alms www.americanradiohistory.com ...THERE'S NO QUESTION! HERE'S YOUR "BEST BUY" The Thrifty 4-Speaker TF-3 from Jensen la the "budget" price range, there is no finer speaker system on the market. In fact, careful comparison proves that Jensen's beautifully balanced TF -3 is unquestionably the finest ... not only the "best buy" ... but point for point, the best system -and you pay much less. Compare ... components: The TF -3 uses a 10' FLEXAIR" woofer, effective from 25 cycles, two special midrange units, and the new Jensen Sono- Dome`Ultra Tweeter. .. so brilliant a speaker, it does not even begin to operate until 10,000 cycles! power ratings: The TF -3 drives to full room volume with a good quality 10 watt amplifier. It does not require a 20 watt amplifier for clean performance. enclosures: In the Jensen TF -3 you get top quality construction 1/4" gum hardwood, rigidly built. It stains beautifully -or paint or build -in as you choose. Dimensions: 131/2"H.,H., 232/3 "W., 113/8 "D. Compare , .. price: There is no real comparison. $79.50 You are invited to make these comparisons -and any others you wish- between the Jensen TF -3 and any other "rated" speaker system on the market regardless of price. Comparison with the thrilling sound of the TE -3 will still further prove that .. 'T. M. there is always something better fron MANUFACTURING COMPANY on 6601 S. Laramie Ave., Chicago 36, Illinois den en In Canada: Renfrew Electric Co., Ltd., Toronto Division of The Muter Co. 10/ / In Mexico: Universal De Mexico, S.A., Mexico D. F. Write for Free Illustrated Brochure "KU ". www.americanradiohistory.com If you have some knowledge of Radio or Television or Electronics now and want to BEGONIE A PROFESSIONAL SERVICE TEGHVI(',IAN you will want to investigate the special ALL -PRACTICE TRAINING PLAN developed for men like you by the OLDEST AND LARGEST home study Over 40 years ago, J. E. Smith, founder of the National Radio Institute, pioneered in teaching Radio by the home study method. Today, this mag- Radio -Television school nificent building is completely devoted to NRI's Radio -TV Electronics training. Here up -to -date lab- oratory and research facilities are constantly testing new developments and improved methods of train- ing men for Radio -TV Electronics careers. MAIL THIS TO NRI NOW All- Practice Method National Radio Institute, Dept.OMFT,Washington 16, D.O. \' El's Professional TV Servicing Accredited Member National Home Study Council Training is practical, complete. You make tests and experiments Please send me a FREE copy of your catalog "How to Reach the Top in TV to help thoroughly understand Servicing." I understand no salesman will call. TV problems. You get equipment to build a 5" Oscilloscope, a 17" picture tube and all components Name Age for building a TV receiver. Com- prehensive Color TV manuals also included. You learn how ex- Address perts diagnose TV defects, get knowledge of professional tech - niques. Mail the coupon for City Zone State tree catalog now. NATIONAL RADIO INSTITUTE,Washing - (Note: This training is NOT for beginners) ton 16, D. C. NOVEMBER, 1960 3 www.americanradiohistory.com NOVEMBER, 1960 Radio -Electronics Formerly RADIO -CRAFT - Incorporating SHORT WAVE CRAFT - TELEVISION NEWS - RADIO & TELEVISION* OVER FIFTY YEARS OF ELECTRONIC PUBLISHING Hugo Gernsback editorial Editor and Publisher 33 Future Space Traffic -Hugo Gernsback M. Harvey Gernsback Editorial Director Fred Shunaman radio Managing Editor 38 FM Finally Makes It-David Lachenbruch Robert F. Scott W2PWG, Technical Editor 43 How to Fix Radios Faster (and Make More Money)-Jack Darr Larry Steckler 56 Convert to Economical Hi -way FM -John J. Borzner Associate Editor 80 Simple FM Converter for TV Uses Minimum Parts I. Queen Editorial Associate - Jonathan Vanderwall Elizabeth Stalcup Production Manager electronics Fernando Martinez Art Director 34 Electromyography -Dr. Bernard S. Post Wm. Lyon McLaughlin 46 Build the Rally -Pal Computer (Cover Feature) -Jack Allison Tech. Illustration Director 55 New for Radar Fred Neinast Art Associate 62 Microwave Transistors Lee Robinson 98 6E5 for Transistor Circuits-Rufus P. Turner Director, Advertising Sales John J. Lamson Eastern Sales Manager what's new G. Aliquo 63 Pictorial Reports of New Developments Circulation Manager Adam J. Smith Director, Newsstand Sales audio -high fidelity Robert Fallath Promotion Manager 40 6DZ7 Amplifier Is Neat Job to Make -Robert M. Voss 52 New Stereo Pickups, Part III -Julian D. Hirsch 71 Improving PA Systems -Leo G. Sands Average Paid Circulation Over 163,000 industrial electronics II 0;11 FIDEI.ITI 49 Subcarrier Techniques for Telemetry -Ed Bukstein 79 The Transient Capacitor, What's It For ?- De /lroye D. Darling ON THE COVER test instruments (Story on page 46) 42 Construct a Tunnel -Diode Noise Generator -I. Queen Behind the wheel and 58 Simple -to -Build Sweep Generator Uses Varicap- Morris Barron ready to begin a sports car 91 PNP -NPN Transistor Oscillator Easily Built T. Merkler rally, the driver sets up his -F. home -made electronic com- puter. The device will help television h:m to be in the right place at the right time -vital if 60 Servicing TV Distribution Systems, Part I -Jack Beever he is to be a winner. 64 TV Service Clinic -Conducted by Jock Darr Color original by Jack Allison. 84 Legal Pitfalls -Leo T. Parker 90 Sawtooth Sticklers- Robert P. Balin the departments Circuits 121 Business and People 99 New Patents 119 Noteworthy News 118 Corrections 102 New Products 112 Technicians' 26 Correspondence 115 New Tubes and 110 Technotes 130 New Books Semiconductors 124 Try This One 127 New Literature 6 News Briefs 120 50 Years Ago Gernsback Publications. Inc, Executive. Editorial and Advertising Offices, 154 West Radio -Electronics November, 1960, Vol. XXXI, No. 11. Published monthly at. Mt. Hugo Gernsback, Chairman at Mt. Morris. 14th SI.. New York I1. N.S. Telephone Algonquin 5- 7755. Morris, III., by Gerttsback Publications, Inc. Second -class postage paid G. Aliquo, Secretary. Inc. All rights reserved under Universal, of the hoard: M. Harvey Gernsback, President; III. Copyright 1960 by Gernsback Publications. 400 South International and Pan -American Copyright Conventions. Advertising Representatives: Los Angeles: Harker-Gusted-Coughlin, Sr. Tel. DUnkirk 7- 2:128. San Francisco: Harker -Gusted-Coughlin, 444 $5.00 for one $9.011 for Alvarado Subscription Rates: U.S., L?.S. possessions and Canada, year' 1 -0151. Chicago: 8631 East Prairie Road, Skokie, Ill. Tel. one $11.00 for Market St.. Tel. GArfield two years; $12.00 for tivee years. Pan -American countries $6.00 for year: 5- :;740. a year; $12.00 for two Oltchard Iwo years; $15.00 for three years. All other countries $6.50 Publishing and Distributing Co., Ltd., 18 Nears; $16.50 for three years. Foreign Agents: Great Britain: Atlas ];rì ale Lan ,-. London E.C. 4. Subscriptions: Address correspondence to Radio -Electronics. Subscription Dept.. 154 to: RADIO -ELECTRONICS. 154 West requesting a change of address, please fur- Postmaster: If undeliverable, send Form 3579 West 14th St., New York 11, N.Y. When York 11. N.Y. *Trademark registered 13. 8. Pat. Office. nish an address label from recent issue. Allow one month for change of address. 14th St_, New RADIO -ELECTRONICS 4 www.americanradiohistory.com START NOW! Break through the Eariing Barrier Ihat stops half -trained men. N.T.S. "All- Phase" training prepares you - at hone in spare time - for a high -paying CAREER In Elec- tronics - TV - Radio as a MASTER TECHNICIAN. Ole Master Course at One Low Tuition trains you irar unlimited cpportuni- ties it All Phases: Servicing, Communications, Pr- aparation F.C.C. License, Broalcasting, Manufacturing, ALtomation, Radar and Micro -Wares, Missile and Rocket Projects. A more rewarding job ... a secure future ... a richer, fuller life can Yob work on be you -s! As an N. T. S.. 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