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98.50 Let me show you how EASY it is to ''" , LEARN TV the practical way ASSEMBLE ATRANSVISION TV KIT r lti% il , ^ Pay as You Wire IWILL HELP YOU to start learning TV the practical way - by assembling a TRANSVISION TV KIT in EASY ITACps. For only 539 you get PACKAGE °1 (standard first pkg. for all of our kits). This package gives you the BASIC CHASSIS and over 450 Tv COMPONENTS with complete Instructions. When ready, you order the next stage (pkg. 2), etc. All stages (or packages) are low priced, making your complete kit terriffic buy! Your completed chassis is superb 25 tube act (22 tubes and 3 rectifier tubes) with 6 "x9" p.m. speaker - a custom-chassis worth up to 100% above your investment. EDUCATIONAL: No previous technical knowledge required. With PACKAGE °1, you get my handy 70 -page plastic - bound Instruction Book which includes o 20 -page Service Section. Also 12 lull ais. (77"x22.1 Drawings and Photographs, a 64 page Service Booklet, and I year's subscription to my "TV and Electronics Notes". AIDS CAREER: Do you plan to be a TV Technician, Service -Dealer, or Engineer? You'll benefit by assembling a Transvision TV Kit. PROFIT 3 WAYS: You profit by gaining valuable practical knowledge ... by saving on servicing costs . and by producing a TV chassis worth up to 100% above your cost. ì Down Payment FEATURES given only in new Transvision TV Kits: No previous technical knowledge required . Easiest to assemble ... New A4 circuit gives finest plop fure and sound . . . Ideal for fringe areas . Has Automatic Frequency Control . Automatic Gain Control ... Retrace Elimination . . Never obsolete because color and other developments can be added easily . . . Choice of 6 KIN. UHF and REMOTE CONTROL may be had at small additional cost. EXPORTERS: Foreign system of 625 lines can be accommodated. Far eeeplet. line of TV Cabinets, ask for folder. Used in Navel R Training Program. FAMOUS EDITOR of a national science magazine says: . my own assembly (of the kit) produced top -quality results, comparable with any set I've seen and better than most ..." n.w FREE CATALOG Tro Tra n b :e n TV Kìt Write to D. GNESSIN, EDUCATIONAL DIRECTOR, att. TRANSVISION, INC.,Dept.RN4KNEW ROCHELLE, N. Y. ris -MAIL THIS COUPON TODAY e -Sp Mr. D. Ge ntin, Educational Director TRAN5VI51ON, INC., NEW ROCHELLE, N. Y. Dept. RN4K l'm enclosing $ deposit. Send standard kit PACKAGE °I. with all Instruction Material. I'll pay the balance C.O.D. Send FREE copy of your new TV Kit Catalog, Cabinet Folder, and Price lists. Name Address City 36 Star. J ceiving micas, molded paper, wax tubulars, bathtubs, electrolytics, oil - filled transmitting, ceramics, trimmers and padders, and other variables. Dimensions, prices, and other useful information are provided. Ask for Catalogue C -10 when writing the company for copies of this publication. NEW HAM REGS NEW' Kit hase been granted to both (aneral and Novice Class amateurs in recent rulings by F(:(:. The pl sections of the 75- and 20 -meter bands. heretofore restricted to Advanced and Extra Class licenses, have been opened to General Class stations. General and higher class amateurs may also operate phone in the 7.2 -7.3 me. segment of the 40 -meter band. and in the new 15-meter band hetween 21.25 and 21.45 ntt. Frequency -shift keying, or Type Fl emission, is permitted in the segments 21.1) -21.25 nu.. and 7.1)- 7.2 me. Phone ens iss' s may be straight AN1. narrow -hand Fil or phase Inla The f.s.k. provin' s are a boon for radioteletype and other exper nters. Novices may now operate C.W. with their usual power limitai' in a segmnt of the 40-mter band. f 7175 to 7201) ice. The Novice band at 26.96- 27.23 nt(. has been eliminated, but a new band was opened for Novices on 15 meters. between 21.10 and 21.25 me. No addit I pl bands were granted Novices as was the ease with other classes. The Nov ice pl band remains at 145 -147 m('. TV SERVICE CONVENTION THE first annual convention of the National Alliance of Television & Electronic Service Associations will be held from April 10 to 12 in Kansas City. Missouri. One and a half floors of the Continental Hotel have been reserved for the vu s displays of u.h.f. tuners, boosters. antennas. and other tcicviequipment and parts made by the approximately fifty manufacturers who will participate. Host for the convention- to which all service shop operators and management personnel are invited. is the Television Service Engineers of Greater Kansas City, an affiliate of the National & Elet tr Alliance of Television Service Associai' The tentative program for the convention includes registra t and cocktail hour on Friday, April 10th; sessions on u.h.f. TV equipment. business management and ethics. and an address by Frank Mock. president of NATESA on Saturday morning and afternoon; and a banquet at which awards will be presented on Saturday evening. A floor show and cocktail party will round out the Saturday program. Sunday morning will be open for various exhibits and round table discussions. Registration blanks for the convention are available from Television Service Engineers, Inc., F.O. Box 8424. Kan- Sas City, Mo. For additional information on the convention write to Walter L. Niswonger, Jr., chairman of the advertising committee at the above address. EMERGENCY PORTABLE RADIO TRANSMITTERS U. S. COAST GUARD TPC 119.A POWER OUTPUT 5 WATTS EMISSION A -2 FREQUENCY RANGE 500 KC AU NEW ! 0 N LY $95 * APRIL SPECIALS R -27/ARC -5* ONLY $24.50 R -28/ARC -5* ONLY 29.50 ARC -4 TRANSCEIVERS* I9.95 *Less Tubes and Dynamotor. MARINE SIGNAL LAMPS 8.75 TOWER MASTS. AN223, 35 Ft. 49.50 TELEPHONE HANDSET F -I.. New 8.25 ANTENNA MAST SECTIONS. SET OF 7 (MS49-55) IN BAG....ONLY 8.50 ANTENNA MAST INSULATORS. TYPE IO6A ONLY 7.50 NEW "SONAR" MOBILES SR -9 RECEIVERS S 72.45 MB -26 TRANSMITTERS 72.45 1 SRT -120 100 -W XMITTERS Illustrated Specifications on Request Bigelow Telegraph WUX, 2 -6666 Newark. N. J. RADCOM Engineering Co P tjViNGSTON ST NEWARK 3, N J COMPETITORS' Team Up to Bring You One Great Electronics Firm Geared for Greater Values! LOOK AT THESE BUYS! TV Ceramic Condensers! 59.50 Value -SE ppd. Klt of 25 mold. 125 mmf to .001 mfd) Brand new, standard brands; over half an temperature compensated. PROP-PITCH MOTORS, new, original boxes 517.95 M IC'RO SWITCHES. new .... 29c ea.. 4 for 1.00 Special Value Combination! 954 ACORN TUBES S. SOCKETS Brand 29c per 4 eats $l New ait 01.'0 METER SPECIAL.! 0-1 MA METER. 2' round, new, boxed $3.95 ARC-4 complete with tubes. less dynamotor. Excellent condition 29.5 LIP MICROPHONES. MC -419. brand new .9 TUNING KNOBS for BC-454 and all Command Receivers, shipped pod 59 ea TELEPHONE HANDSET HANGERS, Postpaid 1.98 POWER TRANSFORMERS 110 V., 60 cy. primary. 150 V.. 30 MA secondary. 6.3 -1 Amp. Ell. 79c... FR for grid dip kits, test equipment. etc. New Partnership Will Pay More Cash for Your Equipment. w for ynoau! r eo-ann ka a d wGett h owu ed tu a pe no kirk -hak.0 Write HARJO SALES CO. Formerly CANDEE -AIRCO combined with ALVARADIO SUPPLY CO. 4109 BURBANK BLVD., P.O. Box 1187 Magnolia Park Station BURBANK, CALIFORNIA Phone: ROckwell 9 -1070 RADIO & TELEVISION NEWS
Fringe Antennas (Continued from page 52) scheme that deserves cons deration, however, is the fact that it i pick -up from the rear of any seltcted arrangement is almost as gooc as from the front. The reception ang e is fairly wide and if strong int rference from side or rear is present, this antenna may present some diffi :!ulties. Fretaray: As shown in Fig. 13, this is a combination "V" antenna for the high -band channels and a zig -zag shaped dipole for the low 'hannels. The combination of these t.vo prin- Fig. 12. Three part elec. Ironically rotate.t, stacked broadbandconict 1 antenna. POOP RT ON ULTRA HIGH FREQUENCY "RECEPTION" r6 ! /d *P41 you can count oa the , 0000 f M -TEE RAY designed and engineered exclusively for UHF UHF ANTENNA oll aluminum sturdy construction minimum space requirements matchless reception notionally advertised
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T EVIS i N APRIL 1953 IN THIS ISSUE
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YOU PRACTICE COMMUNICATIONS with Ki
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I NOW...from D.T.I.s MILLION DOLLAR
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"I Read You Five." Welcome Words! H
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THE ONLY COMPLETE CATALOG FOR EVERY
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Get yourself on the beam to the BIG
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Look! New small size Adashaft Radio
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FETTER RECEPTION EVERY Ol oN 1111.
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A LOOK INSIDE PROVES WHY PAY A SERV
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TELEVISION RADAR ELECTRONICS RESEAR
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BETA RADIATION GAUGING METHODS By G
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would have in controlling the proce
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is done, the meter on the Microvolt
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I voltage regulation', '.'. as well
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DECAY CONSTANT IN VIBRATING SYSTEMS
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I I (5000), and Curie point* occurr
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COAXIAL CAVITY TUNING ELEMENT Fig.
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Make your U H F circuits as simple
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(// Capacitors shown 21 /7 times ac
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RCA N E E DS E NGI N E E RS who won
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O N FREQUENCY CONTROL FOR MILITARY
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i Gpoßt i. NOW YOU CAN 4 pvRAVE ti
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known as the 5894 -A, because the c
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Ticnife "FILTER DESIGN DATA FOR COM
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Converter Calibration (Continued fr
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For opportunities within your reach
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Sweeping the Country! Collins Audio
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ULTRA FAN series-Complete VHF -UHF
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1 029 Leonard C. Lane, B.S., M.A. ;
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A Transistor of point -contact type
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PH I LCO TESTERS Now Yours on NEW S
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Mriiffffifff(i ( l ((( THE RADIART
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TRAIN FASTER- TRAIN BETTER- TRAIN E
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A ROBOT ELECTRONIC TURTLE Closeup v
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7. Solder to the ends of the Fa " s
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THE semi -automatic or "bug" key is
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' even a small wooden box may be us
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Fig. 1. The compact, versatile mobi
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access to a surplus TU -10-B tuning
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CHANNELS Pertinent frequencies and
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quency definition probably wasn't n
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conicals are usually stacked two or
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THE U T SPEAKER ENCLOSURE Design de
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a drop of 6 db -per- octave above 5
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Fig. 1. (Left) Front panel view of
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Fig. 3. Bottom view of the 30-watt
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A LOWR[SISTA NCE OHMMETER _ By J. P
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By HAROLD HARRIS Vice -President, E
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erticle, the results are not too fa
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Sete/t SHORT -WAVE Compiled by KENN
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dual triodes with the necessary int
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You, ecutiAtea a &LtAufoP4Lo ctZ& b
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The data that Launched Thousands of
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Te MANUALS SHOW YOU HOW. Here is vi
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NEW WIDE BAND VERTICAL AMPLIFIE Dir
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Indicates frequency of energized ci
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NAL TRACER KIT OCATOR AND WATTMETER
Page 115 and 116: Mod.loied or nwdc kited RF output.
Page 117 and 118: SUPERHETERODYNE High gain dual iron
Page 119 and 120: H. D. Suesholtz, General Manager, T
Page 121 and 122: It will count events occurring eith
Page 123 and 124: 1 EE101so Mc, MAIL YOUR ORDER TODAY
Page 125 and 126: Which Yo Want? Guet your FCC Ticket
Page 127 and 128: Code Practice Oscillator (Continued
Page 129 and 130: . =Ms or ...eel, u ' tically. topla
Page 131 and 132: 1 II{ Phono Equalizers (Continued f
Page 133 and 134: 1 BA" None None Top Top THE BEST IN
Page 135 and 136: What's New in Rac io (Continued fro
Page 137 and 138: 59 .n 89 60 .89 54.95 . .69 . 1.59
Page 139 and 140: a noted 0630 with news, strong leve
Page 141 and 142: Clearly ' lia) Radio France -Asie,
Page 143 and 144: le in any variable power supply, no
Page 145 and 146: . SI9.95 \I e \ With 1 \I I.IB . 1.
Page 147 and 148: denser (Admiral par number 65B6 -26
Page 149 and 150: nllent 95 D.e.198 e B d. Adjust the
Page 151 and 152: Antenna Measurements (Continued fro
Page 153 and 154: impedance" and is an import ant con
Page 155 and 156: - 1 Junius Heard with news 0730 on
Page 157 and 158: allo is French session 0630 on 15.1
Page 159 and 160: v IlIllIllIlli IllIllIllIll
Page 161 and 162: NEW TV PRODUCTS On The Market "TELO
Page 163 and 164: entire u.h.f. band. A sin ;le switc
Page 165: layout charts and floor arrangement
Page 169 and 170: a theater TV in the frequency spect
Page 171 and 172: Receiver Change s (Continued from p
Page 173 and 174: :nrh BF "BASIC ELECTRONIC TEST INST
Page 175 and 176: S0.62 f tical and easily- understoo
Page 177 and 178: B2 IT'S TERRIFIC! Fig. 3. Circuit t
Page 179 and 180: h' SGP1 7867 Within the Indust.), (
Page 181 and 182: VARIABLE PULSE LIGHT SOURCE HUNGER
Page 183 and 184: completely new system of closed con
Page 185 and 186: p ice businessman sells time, know
Page 187 and 188: It is apparent from the information
Page 189 and 190: 1 -Improving Ir71 vision Technician
Page 191 and 192: i 2 Rate 50c per word. Minimum 10 w
Page 193 and 194: Assembling the components of Raythe
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