Radio News for September, 1935 129
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IN CANADA 30 AWL MIRPIPA BER, 25¢ The IJ.s.rN avy's POWERE U L VOICE S = ARGHLIGHT SEE PAGE 140 Imaril2 BY!_ A Publication Devoted to Progress in Radio Television Service Work Amateur Activity Broadcasting Experiments Short Waves Electronics, Measurements DX Reception Applications Engineering Set Building www.americanradiohistory.com HERE'S THE RECEIVER SHORT -WAVE LISTENERS HAVE BEEN WAITING FOR 96 6H6 110$1011gÿC1gtc TUBE ACTUAL SIZE The invention and development of all - metal tubes by General Electric engineers opened up new possibilities in short -wave FEATURES OF MODEL A -82 and long -wave reception not thought pos- NEW METAL TUBES sible before. So phenominal were the re- More effective shielding and short leads sults obtained that they inspired the design result in higher I.F. gain with greater sta- bility and manufacture of a completely new line -less harmonic distortion on high modulation-less audio gain required - of General Electric receivers. Experi- quieter operation. menters who go DXing with a 1936 Gen- AIR TRIMMER PERMALINER eral Electric Radio will receive a new thrill Accurate calibration and alignment set- in world -wide reception. tings are maintained indefinitely. The re- ceiver operates at maximum performance at all times. SLIDING -RULE TUNING SCALE "Easy to read as a ruler." Only one band visible at a time. Variable ratio drive for easy tuning. "SENTRY BOX" R.F. UNIT All coils mounted directly on band control switch - Minimum length of Leads - Maximum Efficiency. HIGH GAIN I.F. TRANSFORMER Operates at new high maximum efficiency due to perfect shielding of metal tube. HIGH -LEVEL DIODE DETECTION Greater gain in R.F. and I.F. units enables the diode to operate at higher signal level. The result is increased usable sensitivity and better quality of reception. FREQUENCY RANGE 140 to 410 and 540 to 19,500 kc. in 4 bands. And many additional outstanding features. Ask your General Electric Radio Distrib- utor for complete details, or write the Gen- eral Electric Company, Section R -169, Merchandise Dept., Bridgeport, Conn. ELECTRIC RADIO MERCHANDISE DEPARTMENT, GENERAL ELECTRIC COMPANY, BRIDGEPORT, CONNECTICUT www.americanradiohistory.com RADIO NEWS FOR SEPTEMBER, 1935 129 I WILL TRAIN YOU AT NOME IN SPARE TIME FOR A GOOD RADIO JO B J. E. SMITH, Pres. National Radio Institute FREE BOOK jAILC L COUPON Act today for better pay. Act to break away from a low -pay, no- future job. Act to get away from having to skimp, scrape to pay your bills. Mail coupon for my free 64 -page book. It tells you how I will train you at home in your spare time to be a Radio Expert; about my training Good Position Station that has doubled and tripled the pay of many. WSMK $60, $75 a Week "I have a good job, Many Radio Experts Make $40, make a nice salary, and all my success is Consider these facts -think of the good jobs they stand due to N.R.I. 1' am for. Over 17,000,000 Radio sets in use, over 600 broad- operator of Station casting stations, over 40 large manufacturers of Radio WSMK. I highly sets, over 3,000 manufacturers of parts, over 100 Police recommend the N.R.I. Departments Radio equipped, airplanes and airports Course. It enabled me AT HOME to pass the Govern- Radio equipped. Thousands of ships touching every sea- SAVE MONEY -LEARN ment examination for port of the world are Radio equipped. Over 35,000 an operator's license." stores selling sets and parts, about 2,000,000 autos Special Equipment Gives You JOHN HAJDUK, Jr., 21 Gerard Radio equipped and about 20,000,000 unequipped. Loud Avenue, Southern Hills, Dayton, speaker systems wherever people gather, indoors and Practical Experience Ohio. outdoors. Commercial Radio stations dotting our coast $18 a Week in Spare Time lines. Radio a big industry -is growing bigger fast. A Hold your job. No need to leave home and spend a "Although I am do- few hundred $40, $60, $75 a week jobs have grown to lot of money to be a Radio Expert. I'll train you ing only spare time thousands. quickly and inexpensively right at home in your Radio work, I have You a high school or college averaged $18 a week. spare 'time. don't need I recommend N.R.I. Get Ready Now for Jobs Like These education. Many of my successful graduates didn't training. It is cer- finish grade school. My practical. 50 -50 method of tainly a completo A spare time or full time service shop; installing, main- training -half with lessons, half with Radio equip- Course. In a short taining, operating -broadcast, aviation, commercial, ment -gives you broad practical experience -makes time, it will take a ship, television and police stations. A Radio retail busi- learning at home easy, fascinating, practical and man, give him a maintaining, servicing, sound fundamental ness of your own. Installing, rapid. There is opportunity for you in Radio. Old training in Radio theory, prac- loud speaker systems. A service or sales job with a jobs are becoming more complicated-many need tice and design." STEPHEN J. store or jobber. I'll train you for good jobs in every better trained men. New developments are making DRAPCHATY, 407 Wunderlich branch of Radio. new jobs. Short waves, loud speaker systems, police Ave., Barberton, Ohio. Radio, auto Radio, aviation Radio, television - Nets about $50 a Week Many Make $5, $10, $15 a Week Extra Radio's newest uses are covered - by my training. besides Sales in Spare Time While Learning Here's a field that's growing. It is where you find 'iI have been getting growth that you find opportunity. along fine. I aver- Every neighborhood can use a good part time service- age ten calls a week, man. I'll start giving you special instruction material, which nets me about plans, ideas, the day you enroll, for making money in $50, not counting time. Get my book how many of my stu- profits on sales. I spare -read have serviced almost dents make $200 to $1,000 in their spare time while every make of set and learning. have earned more Stanley Tulk, 2705 Hector Street, Montreal, Canada, than I ever expected. writes -"I have been doing so much service work I have doubled I owe my success to haven't had time to study. In two months, I made about the N.A.I. and its wonderful 217 Course." BERNARD COSTA, $200 in spare time." Lloyd V. Sternberg, Fourth 150 Franklin St., Brooklyn, New Avenue, Willmar, Minn., tells me -"I earned enough in York. spare time to pay for my Course. In one month I and tripled Get my earned $125 in spare time." Yes, my training pays! FREE LESSON Your Money Back if Not Satisfied the salaries on Radio Servicing Tips I'll make this agreement with you. If you are not en- I'll prove that my training gives prac- tirely satisfied with my Lesson and Instruction Service tical, money -making information, when you finish, I'll refund your tuition. that it is easy to understand -that of many it is iust what you need to master Radio. My sample Tenon ,text, "Radio Receiving Find Out What Radio Offers Tioublee -the Cause and Remedy" covers a long list of Radio receiver troubles in A. C., D. C.. battery. universal, auto, T. R. Mail the coupon. My book of information on other F.. super-heterodyne, ll -wove, and Radio's spare time and full time opportunities types of sets. And c roes reference system gives you the probable cause and quick is free to any ambitious fellow over 15. Read way to locate and remedy these set troubles. what Radio offers you. Read about the train- A section devoted to receiver J. E. SMITH, President p. agnment, balancing, neutraliz- ing I offer you. Read letters from graduates - ing testing. Get cooupon. Free. No National Radio Institute, Department 5JR áai ó what they are doing and making. There's no obligation. Mail coupon in an envelope or Washington, D. C. paste it on a postal card -NOW. Il Dear Mr. Smith: I want to take advantage of your Spe- J. E. SMITH, President cial Offer. Send me your two books, "Radio Receiver ll Troubles -The Cause and Remedy" and "Rich Rewards in National Radio Institute, Dept. 5JR Radio." I understand this does not obligate me. (Please print plainly.) Washington, D. C. NAME AGE ADDRESS lesfiea WayW y to gElIERp Ay CITY The STATE 14X -1 www.americanradiohistory.com Edited by LAURENCE MARSHAM COCKADAY S. GORDON TAYLOR WILLIAM C. DORF Managing Editor Associate Editor JOHN M. BORST JOHN H. POTTS Technical Editor Assoc. Tech. Editor JOSEPH F. ODENBACH Art Editor Vol. XVII September, 1935 No. 3 keading Cuide 1 Radio Facts and Oddities H. T. Elmo 132 2 Dots and Dashes News Staff 134 to this Issue- 3 Metal Tubes c Editorial 136 4 Radio in the C.C.C. Stephen C. Manning 137 As a matter of convenience for 5 those having specialized interests What's New in Radio William C. Dorf 139 in the radio field, the following 6 The Navy's Voice Searchlight The Editor 140 lists the articles and features in this issue, classified under 14 7 The "Normandie's" Radio Equipment Jean Ledoux 141 heads. The numbers correspond 8 Television in Canada Oakille 142 with the article numbers in the Rupert Table of Contents on this page : 9 Building the Super DX-8 John M: Borst 144 AMATEURS -3, 5, 8, 9, 12, 13, 14, 10 A Superhet 15, 16, 17, 24, 26, 27, 31, 34, 36.