L lcrusll't TELEVISION NEWS ex, I .I:I:i I4 JI% S HUGO GERNSBACK, Editor formerly LADY TELEVISION ENGINEER SEE TELEVISION NEWS =1949= NOV _IS= 1949 30r U. S. una CANADA LATES IN RADIO - ELECTRONICS - TELEVISION www.americanradiohistory.com 4 diiit YOUR TELEVISION WILL BE IMPROVED WITH A D OUTDOOR AERIAL P;74; The modern miracle of pictures by air can be a most satisfying means of entertainment. But be satisfied only with a picture comparable to a class "A" motion picture-on every station in your area. It is unnecessary to compromise! HERE'S WHY: Television waves are like light beams - solid objects reflect and refract them, making it impractical to pick up all stations from an indoor aerial. That is why you get double images on some stations. In addition, indoor aerials have poor signal pickup making it difficult to get good pictures on all stations. 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Still I vision Communications opportunities and training. (No R. I. texts as with Coil Service as I- using my N. salesman will Please write plainly.) Electrical Engineer."-ase"- swell references." - CHAS. I call. OTIS L. WRIGHT, Altai- W. STOKELEY, ChatW nooga, Tenn. Age .. 4 - queryur, N. M. ...at I Name Address GET THIS TRAINING WITHOUT COST UNDER City Zone State. Check if Veteran Approved Under G. I. Bill VETERANS G. I. BILL. MAIL COUPON. ID www.americanradiohistory.com Hugo Gernsback, Editor -in -Chief RADIO Fred Shunaman, Managing Editor 1:1.1:1:iR11\ I/:S M. Harvey Gernsback, Consulting Editor formerly RADIO -CRAFT Robert F. Scott, W2PWG, Technical Editor lemroeratlee elAYg ISION NEwS R. H. Dorf, W2QMI, Associate Editor RADIO e ISION Tr.dem.rk registered U. S. eu,rna UmeS I. Queen, W2OUX, Editorial Associate John J. Lamson Angie Pascale, Production Manager Sales Manager Wm. Lyon McLaughlin, Lee Robinson Technical Illustration Director General Manager G. Aliquo Circuiullon manager Contents_ November. 1949 Editorial To the Service Technicien by Hugo Gernsbock 19 FM (Pages 20 -22) Limiter -Discriminator versus Ratio Detector by H. K. Milward and R. W. Hollows 20 Television News (Pages 23 -30) S SECOND HEATING Lady Television Engineer by Tex Borborite 23 no waiting, saves power Indoor and Built -In Antennas -Their Strong and Weak Points..by Ira Kamen 25 Television Station List 27 RIGID-TIP Tv Custom Instollations by David T. Armstrong 28 latest in tip engineering Theory and Engineering (Pages 31 -32) Microwaves, Part VII. by C. W. Polmer 31 LONGER REACH Amateur (Pages 33 -34) full 51/4 inches How to Become o Ham, Part II- Learning the Code by George Shuart 33 SOLDERLITE Code Practice Stations 34 - spotlights the work Broadcasting and Communications (Pages 35 -36) Case of the Elusive Blip.. by James W. Essex 35 STREAMLINED Sideband Suppression by I. Queen 36 perfectly Test Instruments (Page 37) balanced Tracer Uses Tube as Probe by Alva R. and Kenneth W. Wilson 37 DUAL HEAT Electronics (Pages 38 -39) single heat Cameros Are Tested with Simple Setup .by Fred C. Gabriel 38 200 watts, Construction (Pages 40-41) dual heat Miniature -Tube Receiver Hos Permeability Tuner...'by John E. Hozelrigg 40 200/250 Push -Pull Crystal Receivers by Rufus P. Turner 41 watts; Audio (Pages 42 -43) 115 volts, Design of Class -B Drivers by W. H. Anderson, VE3AAZ 42 60 cycles Servicing (Pages 44 -60) Service Technicians Hold Convention (see The Radio Month, page 9) You can do every kind of soldering Service Data, Technicians, and Money by John T. Frye 44 with this new 250 watt Weller Gun. Curing I.F. Oscillations by John A. Dewar 46 Power -packed, it handles heavy Home Study Courses Useful to Radiomen by Samuel Freedman 47 work with ease -yet the compact, Radio Set and Service Review (Eicor Model 1000 Tape Recorder) 50 lightweight design makes it equally Fundamentals of Servicing, Port IX -The Diode Vacuum Tube..by John T.