Circuit Digests
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r E. Circuit Digests ...4, .,1-11.... ..:14W1 ----em.----.---"_,_e--------_,---4i'llylur \s, t The televisiontehniciein becomes MR.B\G when the TV set goesaad February 1954 ofALLFixed Composition Resistors byalmost 10 *Not Claims! Not Predictions! But PlainFacts! Unbiased, authoritative, independent surveys (made regularly since 1930) show IRC BT RESISTORS to be the Service Technicians' choice by a continually increasing margin. Today, BT RESISTORS are preferred over the total of all other brands combined! Ask for IRC BT's Most Service Technicians Do ! INTERNATIONAL RESISTANCE COMPANY 425 N. Broad Street, Philadelphia 8, Pa. (Avon* &taut Sof -Ann, In Canada: International Resistance Co., Ltd., Toronto, Licensee TECHNICIAN* Circuit Digests TELEVISION ELECTRONIC RADIO AUDIO SERVICE M. CLEMENTS 0. H. CALDWELL FEBRUARY, 1954 a Publisher Editorial Director SOL HELLER, Managing Editor SIDNEY C.SILVER, Associate Editor Problems Ahead, Outlook Good 21 ANN O'ROURKE, Assistant Editor J.L. STOUTENB'JRGH, Consulting Editor "Tuning in the Picture" 22 CHARLES F.)REYER, Art Director ELMER KETTERER, Circuit -Digest Production More About Color TV Fundamentals Peter Orne & Sol Heller 24 GEORGE PUGLICI, Circuit Diagrams Servicing AC -DC Radios M. G. Goldberg 27 Hi Fi Guide to Pickup Arms and Cartridges Harry Mileaf 28 BUSINESS DEPARTMENT What's Wrong with Carbon Tet? . Harry E. Shulman & Murray Jelling31 M. H. NEWTON, Business Manager Philip Thier 32 H. A. REED, Genera: Sales Manager Troubleshooting Drift in Television Receivers DIXON SCOTT, District Manager Cyrus Glickstein 35 LEE GRAVES, District Manager Eliminating Tweet Interference CHARLES S. ROEVER, District Manager N. McALLISTER, Asst. Business Manager Modern Russian TV Receiver 36 MARTHA USDIN, Production Manager KATHLEEN CAFARO, Reader Service Rx for Ailing CRTs 38 WARREN S. BROWN, Circulation Manager M. GROENING, Asst. Circulation Manager New Components 45 JOHN J. BORGHI, Controller W. W. SWIGERT, Credit Manager Audio and Hi-Fi Items 47 480 Lexington Ave., New York 17, N. 1. Telephone Plaza 9-7880 Technician's Lighter Side 48 S. M. GASKINS, Western Manager 51 JOHN D. LUPTON, District Manager Keep Your Eyes on Profits! 201 N. Wells St., Chicago 6,III. Telephone RAndolph 6-9225 Manufacturer's Changes in TV Sets 58 CHRIS DUNKLE & ASSOCIATES California Representative Circuit Digest Cumulative Index 69 3257 W. 6th Street, Los Angeles 5, Calif. Telephone DUnkirk 7-6149 1355 Market Street, San Francisco Telephone Klondike 2-2311,Ext. 579 *CIRCUIT DIGESTS (See pages following p. 72) ADMIRAL: Chassis 20A2, 20A2Z, 20D2 GENERAL ELECTRIC: "EE" Chassis CIRCULATION MAGNAVOX: Chassis 108A Series RAYTHEON: Chassis 21T11 50,000 WESTINGHOUSE: Chassis V-2250-1 -servingtheindustry'slargest groupof servicetechnicians,service managers and installation specialists. DEPARTMENTS Letters to the Editors 14 Service Ass'n. Reports 53 TECHNICIAN, Feb-uary 1954, Vol. 59,No.2. Color Shorts 40 Calendar of Coming Events 53 50 cents a copy. Published monthly by Caldwell - 41 "Tough Dog" 54 Clements,Inc.,PublicationOffice,Emmett St.. Shop Hints Bristol,Conn. Eoitorial,Advertisingand Ex- New Products 42 Mfrs. Catalogs & Bulletins 60 ecutiveOffices,480LexingtonAve.,New York New Books 63 17, N. Y. Entered as second class matter at the PostOfficeatBristol,Conn..Nov.4,1953, under the actof March 3, 1879. M. Clements, President;M.H.Newton, AssistanttoPresi- dent; JohnJ.Borghl, Vice President and Sec- CALDWELL-CLEMENTS, INC. retary; Marguerite B. Clements, Treasurer. PublicationOffice,Bristol,Conn. Subscriptionrates:UnitedStatesandCanada, Editorial/Business Offices 480 Lexington Ave., New York 17, N. Y., Tel. Plaza 9.7880 $4.00 for one year; $6.00 for two years; $8.00 for three years. Pan-American and Foreign Publishers also of MART and TELE-TECH & ELECTRONIC INDUSTRIES countries: $7.00 for one year; $10.00 for two *Reg. U. 5. Patent Office years; $14 forthreeyears.PrintedInU.S.A. Copyrightby Caldwell -Clements,Inc.. 1954 Merit devotes their undivided atten- tion to service equirements for transformers and coils. THERE is n o competition for the time and e ffort of Merit engineers and pro- duction, whose sole responsibi- lity is to design and produce what the service field wants and needs when it is needed Merit --exclusively for service. 4 POINT 2Merit actively aids in irlf service. Merit trans- formers and yokes re- 0%%opt." tain actual operating characteristics of the wasisfoRmE Street Clock original components 4427North but design improvements simplify replacement installation. Merit installation instructions are more complete than any others available. Merit's is the most complete re- placement catalog and the Merit replacement guide is ahead of service requirements. Merit transformers are tape marked* for quick positive identification. Find Merit's complete line listed in John Rider's Tek-File and Howard Sam's Photofacts and Counter Facts. *originated by Merit. PROGRAM air 4 POINT PROGRAM 3It is the Merit cy to sim- plify Service. erit has proved is possible 11 for one transformer to serve a multiple purpose -- that is replace more than one particular unit without sacrific- ing the essential operating effi- ciency of any of the various original components. Exact re- placements are included in the Merit line only when substi- tution would complicate re- placement labor. A stock of Merit replacements is always live there are no dust -catchers in the Merit line. 4 POINT. PROGRAM x 4 POINT P mmumime Chicago,fir, Hollywood,2 Hollywood. 3 modern plants prove Merit means: Servicene Wherever the customer is located there is a Verit plant dedicated to turning out service requirements fast for his area. The whole country is Merit's backyard and all customers are preferred. ZOGRAM 011111' 4 P01 PROGRAWI HIGH GAIN Admiral BOW TIE LOW Lowest cost ever for a quality UHF antenna. Gets excellent reception in good signal areas on any of the 70 UHF channels. Each antenna furnished with stacking bar. Mastmountingbrackets in- cluded. Mast not included. No. AN65A-Deluxe-Shipped completely assembled. Suggested list price $5.95 COST No. AN65B-Standard-Similar to above, smaller reflector screen. Shipped knocked -down. Sug.list price.. $3.95 Admiral You'll make an extra profit on every in- stallation using these high gain UHF CORNER REFLECTOR antennas. Ask your Admiral distributor Recommended for troublesome locations where about the extra large discounts from the ghosts, reflections and interference are encountered. list prices quoted here. High gain, 14db. Front to back ratio 15 to 1. Assembled, ready to put up. Mast mounting You'll be giving your customer extra bracket included. Mast not included. value, too! All these antennas are finest quality.. No. ANS6A-One bracket mounting. made with aircraft aluminum Suggested antenna elements and vibration -proof re- list price 11.25 flectors. "A -frame" insulators provide No. AN56B-Same asabove, frontmount- plenty of free air space around elements. ing. Suggested The units have high mechanical strength list price 11.25 and low resistance. They are double plated for extra resistance to weathering... INDOOR UHF ANTENNAS first zinc plated, then dipped in zinc dichromate which gives them a beautiful gold finish. These antennas can be easily Admiral Super fastened to existing masts and towers. Recommended for troublesome loca- Order by part number from your Admiral tions. Exceptionally high gain ... over distributor. 7 db.... excellent ghost suppression. Only 12 inches wide. Weighted and Ask your Admiral distributor for feltpadded base. FREE CATALOG Admiral Target with complete line of Admiral Smartly styledin rose -goldcolored TV antennas and accessories anodized aluminum with mahogany No. 94A10-6- phenolic base. Stands only 10 inches No. 94A10-7 - Complete with lead-in. high. Base is weighted and felt padded Complete with lead-in. Admiral Corporation suggested ... can be placed on top of receiver Suggested $495 Accessories and Equipment Division, list price..92.95 list price. ... picks up all UHF channels. Chicago 47, Illinois 6 TECHNICIAN February, 1954 Ask your TM DISTRIBUTOR how you can get the time and money saving newRAYTHEON BROW -CITE Here's another sensational Raytheon first. It's a Here's why Service Dealers from coast to coast are hailing the RAYTHEON BROW-LITE: different kind of flashlight that sheds a new FREES BOTH HANDS - work is easier, faster light on Radio -TV servicing - makes it faster, DIRECTS LIGHT AUTOMATICALLY-you seewhat easier, more profitable. you look at in a clear, bright light .0AEY ',2 USES STANDARD PARTS - 1V2 volt penlite batter- c. ies and 3 volt penlite bulb RAYTHEON BROW-LITES ANYONE CAN USE IT - fits easily above glasses areavailablethroughyour e EASY TO CARRY - folds compactly to packet size Raytheon Tube Distributor. Ask 40 REPLACES FLASHLIGHTS - easier, safer to use him how to get a supply for you and your men. O DURABLE - made of rugged plastic AYTHMEON, Receiving Tube Division excellence in elecitzknics Newton, M3hicago, Ill., Atlanta, Ga., Los Angeles, Cal. RECEIVING AND PICTURE TUBES RELIABLE SUBMINIATURE AND MINIATURE TUBES SEMICONDUCTOR DIODES AND TRANSISTORS NUCLEONIC TUBES MICCOVIIINE TUBES TECHNICIAN February, 1954 the newest addttton\ .® 1p) TR-4...tLe de -luxe HEAVY DUTY rot3r complete with mod- ern design meter control dial cab- inet, .sing 4 wire cable 53..95 // CORNELL-DUBILIER SOUTH PLAINFIELD, NEW JERSEY to the family of C*D*R Rotors the ultimate in heavy duty Rotors incorporating all the fine features that have made the TR-2 outstanding plus