Radio age (Jan-Dec 1926)

VinVi?^?6 ©C13 716380 NUV L-p ^ RADIO AGE for December, 1926 The Magazine of the Hour The Magazine of the Hour Established March, 1922 Volume 5 December, 1926 Number 12 CONTENTS FOR DECEMBER ISSUE Cover Insert by Gordon K. Martin Start Radio with Crystal Set 5 By Armstrong Perry Baseboard vs. Chassis Construction 8 By H. Melchior Bishop Double Wave Remote Control Transmitter 9 By A. P. Peck Death Ray Tube Turns Gases to Solids .11 Highlights on Wavelengths and Frequencies 13 By Kirk B. Morcross Turning Soprano to Contralto 16 By I. J. Karr What Do We Get From Boston? 17 By Dorothy Brister Stafford Design and Manufacture of Resistance Units .20 By Joseph Morgan Versatility and Simplicity in This Set 21 Six Tube Receiver Completely Shielded 25 By McMurdo Silver Who Said the Parts Business is Dead? 33 By F. A. Hill Use Radio to Obesrve Continental Drift 35 By S. R. Winters Radio Storm Detector 36 Pickups and Hookups by Our Readers 37 New York-London High Speed Cable Link 39 With the Manufacturers 40 Art of Television not Far Off 42 By Albert W. Franklin Types of Rectifier Tubes Discussed 48 By Frank L. Eichner Correct List of Broadcast Stations 62-64-66-68-70 Classified Advertisements 71 Radio Age is published monthly by RADIO AGE, Inc. Member: Audit Bureau of Circulations. Publication Office, Mount Morris, 111. 404 North Wesley Ave., Address all communications to RADIO AGE, Inc. Executive, Editorial and Advertising Offices 500 N. Dearborn Street, Chicago, 111. Frederick A. Smith, Editor F. A. Hill, Associate Editor M. B. Smith, Business Manager Advertising Manager HARRY A. ACKERBURG BOO N. Dearborn St., Chicago. III. Eastern Representative HEVEY & DURKEE, 15 West 44th St., New York, N. Y. Pacific Coast Representative V. M. DEPUTY & ASSOCIATES, 515 F. W. Braun Bldg., Los Angeles, Cal. Final Advertising forms close on the 20th of the 2nd month preceding date of issue Vol. 5, No. 12, Issued monthly. Subscription price $2.50 a year. December 1926. Entered as second-class matter at post office at Mount Morris, Illinois, under the Act of March 3, 1879. Copyright, 1926, by RADIO AGE, Inc. Chats With the Editor SCIENTISTS at large will welcome Dr. Coolidge's recent perfection of a cathode ray tube whose use in research will open many avenues heretofore closed. A diagram of the tube, together with a brief description of its functions, is presented for the benefit of our readers. Armstrong Perry tells how to get started in radio at a very slight expense by use of the crystal receiver. This is one of a series of articles which Mr. Perry has prepared for the beginner and should be fine reading for the man who is just on the threshold of radio. A combined short-long wave receiver, and a wavemeter of the resonance indicating type, has been prepared for the enthusiast who does not care to be limited to a single wave band for reception. The wavemeter is for the more advanced experimenter. Another receiver of interest, available in kit form, is the six tuber which is completely shielded. It is described and illustrated in the blueprint section of this issue. Kirk B. Morcross gives our readers an idea of why the wavelength allocations made by the government are figured in kilocycles instead of meters. Many a fan who has been puzzled by the kilocycle terminology will find the explanation a rational and simple one and much better suited to our needs than any other method. Side band transmission is detailed by I. J. Karr who tells of some of the work being done by the General Electric with that type of transmission. Three advantages are listed for the side band transmission, the greatest one from the listeners' standpoint being the reduction of interference. The broadcasters might welcome it since greater efficiency is secured. Editor of RADIO AGE.