The Key Davy Radio TV EXPERIMENTER

Radio-111now there areEXPERIMENTERtime & tool-savingDec. '68/Jan. '69Vol. 25 /No. 3Dedicated to America's Electronics Hobbyistsdouble duty setsEditor- in -ChietJULIAN M. SIENKIEWICZWA2CQL, KMD4313New PS88 all- screwdriver setrounds out Xcelite's popular,ecompact convertible tool set line.Handy midgets do double dutywhen slipped into remarkablehollow "piggyback" torque amplifier handle which provides thegrip, reach and power of standarddrivers. Each set in a slim,trim, seethru plastic pocket case,also usable as bench stand.Managing EditorRICHARD A. FLANAGANKQD2566Technical EditorCLIFFORD L. FORBESKBQ8535PS885 slot tip.3 PhillipsArt EditorJIM MEDLERscrewdriversNew EditorHELEN PARKERKQD7967Art DirectorANTHONY MACCARRONEPS72 slot tip.2 PhillipsCorer Art DirectorIRVING BERNSTEINscrewdrivers,2 nutdriversAssociate Art DirectorJOHN YUSKOArt AssociateJACK GOLDENAdvertising ltaoagerJIM CAPPELLOProduction DirectorCARL BARTEEProduction AssistantMARILYN VARGASKit Division .lfanogrrWILFRED M. BROWNPS12010 colorPresident and PublisherB. G. DAVIScoded nutdriversErecutire Tke- President and Assistant PublisherJOEL DAVISVice-President and Editorial DirectorHERB LEAVY, KMD4529Vice-President and Production DirectorLEONARD F. PINTOlVice -President end TreasurerVICTOR C. STABILE, KBP0681RADIO -TV EXPERIMENTER (Vol. 25, No. 31 is publishedbi- monthlyby Science 8 Mechanics Publishing Co., a subsidiary of DavisPublications, Inc. Editorial, business and subscription offices:229 PorkAvenue South, New York, N.Y. 10003. One -year subscription(sixissuesl - 4.00; two -year subscription 112 issuesl - 7.00;and three year subscription 118 issueslAdd 1.00 per year for postageoutside the U.S.A. and Canada. Advertising offices: New York,229Park Avenue South, 212-OR 3 -1300: Chicago; 520 N. MichiganAve.,312. 527.0330; Los Angeles: J. E. Publishers' Rep. Co., 8380 MelroseAve., 213 -653 -5841; Atlanta: Pirnie 8 Brown, 3108 Piedmont Rd., N.E.404.233 -6729; Long Island: ten Osten, 9 Gorden Street, GreatNeck,N.Y., 516- 487 -3305; Southwestern advertising representative: JimWright, 4 N. 8th. St., St. Louis, 314 -CH- 1.1965.- moo.IXCELITE INC.64 BANK ST., ORCHARD PARK, N. Y.Please send free literature N563.name10003.addresscity6EDITORIAL CONTRIBUTIONS must be accompanied by return postageand will be handled with reasonoble care; however, publisher assumesno responsibility for return or safety of manuscripts, art work,orphotographs. All contributions should be addressed to the Editor.RADIO -TV EXPERIMENTER, 229 Pork Avenue South, New York, N.Y.state 8 zoneSecond class postage paid at New York, New York and at additionalmoiling office. Copyright 1968 by Science and Mechanics PublishingCo.RADIO -TV EXPERIMENTER

Want a high -pay career in Electronics?Thisfree bookmay changeyour lifeIt tells how to go about getting the keyto job success in the growing electronicsboom -a Government FCC LicenseA BIG BOOM IN ELECTRONICS. And YOUcan be part of it. You don't need a college education or any previous experience in electronics.The free book shown here tells you how.In the last 15 years, the electronics manufacturingindustry alone has grown from 2.7 billion to 17billion, and is expected to hit 24 billion by 1970.Thousands of trained men are urgently needed tohelp design, manufacture, inspect, test, install, operate, and service electronics marvels that are making headlines. If you qualify, it means a secure,steady, high -pay job with a real future.Maybe you'd like to become a broadcast engineer.put famous radio disc jockeys and television entertainers "on the air." Or be your own boss servicing some of the more than a million two -way mobileradio systems in taxis, trucks, trains, etc. Or workalongside famous scientists developing and testingsuch electronics miracles as picture -frame TV,desk -top computers, pea -sized hearing aids, rocketguidance and control systems.Regardless of which you choose, the secret of"getting your foot in the door" is getting an FCCCommercial License issued by the U.S. Government. It's government -certified proof, respected byemployers everywhere, that you have passed astandard Federal exam on the fundamentals of elec-THERE'Stronics -that you're not just an electronics handyman, but a real "pro." Many jobs legally require it.Now, because of the importance of getting yourFCC Commercial License, the Cleveland Instituteof Electronics has prepared a valuable 24 -pagebooklet telling you how to go about it.You will find out why the Commercial FCC License is often called the "passport to success." You'llsee how and why the U.S. Government issues theselicenses. You'll learn how you can get your license.and qualify for top opportunities in Electronics.With this booklet, you will receive a second freebooklet, "How to Succeed in Electronics." It's thecatalog of the Cleveland Institute of Electronics.first organization to offer an FCC License Warranty(see below). You will learn why better than 9 out of10 men with CIE training get their FCC Licenses,even though 2 out of 3 without this training fail.To receive both books without cost or obligation,just mail the coupon below. Do it right now-it maychange your whole life.rMAIL COUPON FOR2FREE BOOKSCleveland Institute of Electronics1776 East 17th Street, Dept. EX -29, Cleveland, Ohio 44114Please send me, without cost or obligation, your 24 -pagebooklet. "How to Get a Commercial FCC License," togetherwith your school catalog of license- preparation courses.AGENAMEMeas. print clearly)ENROLL UNDER NEW G.I. BILLADDRESSAll CIE courses are available under the newG.I. Bill. If you served on active duty sinceJanuary 31, 1955,ORare in service now, checkbox in coupon for G.I. Bill information.JANUARY, 1969STATECITY;iZIPOCCUPATIONAccredited Member National Home Study CouncilA Leader in Electronics Training.Since 1934EX -29J7

page of the latest Hi-F1 BUYERS' GUIDE here inBig City Editor's office, my hurdle is how toconvince my readers that this book is every bitas great as I think it is. I'll begin by saying thatthis is a magazine with a difference, designed tohelp you, the buyer, pick the hi -fi componentsthat are right for you. It's packed with test re-POSITIVE FEEDBACKHi -Fi** * ** * * * * * * * * * * * * * * * **GUIDEBUYERSJULIAN M. SIENKIEWICZ, EDITORfloodMoustache Wax, Anyone?I know it will happen! Someone will write the Editor, askingwhether or not the moustache worn by GeneCashman on our cover this issue is for real. Inthe interests of honest reporting I must state themoustache is not real. However, Gene wassporting the bristly ends of a rudimental mous-,.Tti.iílW Y!!8 WMOIEMfiliilk S1.iF5A really good bud-Hi -FiBuyers' Guideports on stereo equipment of all kinds, reportsthat tell you exactly how each and every pieceof equipment chalked up when put through itspaces in our lab. To round off fully 35 pagesof test reports, this issue offers some first -ratefeatures that are bound to be of interest to everyone who wants their true hi -fi dollar's worth.You'll find the Fall /Winter 1968 HI-FI BUYERS' GUIDE on your newsstand now. Price is 1.25, but don't look on the outlay as moneyspent. How come? Simple! The purchase priceis peanuts compared to what you can save byusing and applying the wealth of information itcontains. But that's only my opinion -get acopy of Ht-Ft BUYERS' GUIDE and agree withme!Ramuk of Rabat is no other than Gene Cashman, aprofessional actor and model. Gene had a lot offun posing for this cover until his moustache dropped.tache indicating he lost the original about election time. I tried to pry the truth from him asto why the upper lip was shorn clean, but Generefused to reply with fingers pressed to ourFickle Finger Finder. To understand why Genefeared the Fickle Finger Finder you only haveto put one together. Complete plans are givenin this issue, starting on page 39. You'll findthe Fickle Finger Finder fantastic for fun orfame!It's The Greatest! Leafing through page after8Hey, Mr. Postman. This is not a letter column, but my regular readers know that I publish letters from time to time for various reasons. Here is a letter on a plea for information.Calling Nimbus FollowersI'ma highschool student in the senior year andnow in the process of building an automatic picture taking reception station for the current Nimbusand ESSA series weather satellites. I should be operational this coming fall. This station is not of thecommercial variety, but of the type now being builtfor amateur use; preferably the one designed byK2RNF in 1965. This is the one that can be builtfor less than 250.00 as opposed to the commercialtype running in the 35,000 range.I would like to get in contact with other amateurs(Continued on page 10)RADIO -TV EXPERIMENTER

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*******(Continued front page 8)with similar interests in this fascinating hobby. Iwould appreciate it very much if you would referme to them, and, if possible, if you know of anygroups that are being formed or have been formedwith this hobby interest in mind.Okay, out there in reader land, if you canlend a hand -get going. Drop a post card toConrad J. Baranowski, 109 Peterborough St.,Boston, Mass. 02215.Only the real nosey reader, the kind of Joewho reads the small print in front of every issue,would have noticed that the offices of RADIO -TVEXPERIMENTER have moved. This Editor isproud of the change because Our new offices arelocated on a famous site in the history of electronics-so famous, in fact, that a bronze plaquethe slogan of this magazine and its sister publication, ELEMENTARY ELECTRONICS, which reads"Dedicated to America's Electronics Hobbyists."The Editor and his staff do not take this sloganlightly. In each issue we dedicate not only themagazine but our efforts to you, our readersAmerica's electronics hobbyists. Most of thetime we do a good job of it, and when we dowe would like to hear from you. Write to theEditor and give him a "pat on the back" withyour pen. But, when we fail, or goof, or committhe crime of omission -write and let us have it.Further, everyone at one time or another comesup with a story idea that they would like to seein print. Well, drop us a line and you nevercan tell. Your post card may be the major subject of our next editorial meeting. Let's hearfrom you.-Mere It Is, Flower Kldsl In our last issue wetossed a sticky little problem at our readers.All they had to do was reshape the left groupof circles so they look like the group on theright. Well, the diagram speaks for itself. Theproblem is very simple once you see the centerflower pattern and three outboarded circles (weshow them shaded here to make your viewingeasier.) Okay, now honestly -how many outthere in reader land had to wait for this issuefor the solution? Bet you don't send in a postcard telling me!Somebody, Tell the Russians. Once they gotmatched pair of space probes (one Russianand one American) complementing each otherin the vicinity of Venus last October, scientiststhought they had at last licked the cloud shrouded planet's two most tantalizing mysteries -the temperature and atmospheric pressureat the surface. But there was a hitch, it nowdevelops.The measurements assumed that Russia'sVenus 4 probe had, as claimed, zipped in toabout 15 miles above the planet, then releaseda parachute- equipped instrument package whichgathered and transmitted data all the way downto its collision with the surface.But there is now reason to believe that thepackage was 30 miles above the surface whenfreed and 15 miles up when the transmissionsstopped. If true, this could mean that the atmosphere at the planet's surface is some fivetimes as dense and almost 300 degrees warmerthan the Soviet data indicated.(Continued on page 12)aLee De Forest Memorial Plaquewas affixed to the building near the entranceall tosee.It reads-forLEE DE FORESTThis building stands on the site of the oldParker Building destroyed by fire in 1908. Inhis small laboratory on the top floor of thatbuilding Dr. Lee De Forest in October, 1906 invented the grid "Audion" or three electrodevacuum tube on which our electronic era hasbeen founded.DE FORESTPIONEERSNOVEMBER12, 1956Now, this would seem to be the time to dedicate our magazine, but that has already beendone. Near the top of page six in this issue is10RADIO -TV EATERIMENTEE

trial trains youto fix 70% of all T11 sets10-daymended tools and an old TV set to work on.No prior knowledge of electronics needed.Self- checks guide you through each lesson.The comprehensive final exam tests your mastery of 100% of the troubles that plague TV.It leads to the famous ICS diploma and is animportant step toward certification by National Electronic Associations.You've got to be convinced that this is thefastest, most practical training ever offeredin TV Servicing /Repair or you get your moneyback.Study the first two lessons in your sparetime. If within 10 days you don't feel qualifiedto tackle 7 out of 10 TV repair jobs, stop rightthere. Return the course and we'll refundevery cent you mailed with your application.Send just 15of 15 and you're on yourway. We'll rush your complete training program by return mail. Or enclose full payment( 99) with your application and receive in adA down paymentComplete training programOr use your 10 days to check out all 6 illus-trated texts, the dictionary of electronic terms,the exam you'll take at the end.See how simply and graphically this newprogram covers complex troubleshooting problems. For color as well as black and whitereceivers. Including the newest solid stateand printed circuit models. Find out how toset up a successful business of your own.a portfolio of 24 schematics, the TVserviceman's "circuitry roadmaps" you'llneed them when you open your own shop.The faster you act, the sooner you can become a professional TV technician -within 6months if you mail your application today.There's absolutely no risk. The 10 -day trialapplies to either payment plan. Take a moment to fill out coupon and apply now.ditionGet started immediatelyAll you need to start are a few recom-ICS-1ICS, Scranton, Pa. 18515Dept. Y5334KPlease rush me your TV Servicing /RepairCourse. I understand I may return it within10 days -and you will return my moneyif not completely satisfied.Enclosed is check or money order for: 99 plus state tax (full price includesportfoli

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