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Radio News (02:07) January 1921

Hugo Gernsback, editor

"In 1912 two engineers, Messrs. E. S. Pridham and P. L. Jensen, were experimenting on the rapid recording of radio signals at a small laboratory in California. During their research they discovered a new and more powerful receiver able to transform voice current into sound waves proportionate to the voice current supplied to it. This was the electro-dynamic receiver and gave forth sound exactly as current was put into it with practically no limit except for the electrical design of the windings."
This is the January 1921 issue of Radio News. The cover art is “Grandma Listens In.” Articles include  an improved regenerative circuit, a honeycomb coil machine, an electro-dynamic receiver that can power a speaker (the moving-coil invention of P. L. Jensen), and building a simple transmitter.
Contents of this Issue:
  • The Electro-Dynamic Receiver
  • An Efficient Wave-Meter (Fred A. Burgess)
  • How We Came to Have a V.T. Transmitter on the U.S. A. T. Princess Matoika (F. M. Daggett)
  • Awards of $100 Portable Radio Prize Contest
  • Comparison of Modulation Methods in Radio Telefony, Part 2 (A.S. Blatterman)
  • Audio or Radio Frequency Amplifier (P.L. Welke)
  • A Honeycomb Coil Machine That Works (Raymond Roof)
  • A Regenerative Improvement (G.N. Garrison)
  • A Complete Portable Set (D.R. Clemons)
  • Thermionic Vacuum Tube as Detector, Amplifier, and Generator of Electrical Oscillations (W.H. Eccles)
  • Ideas–Eighth Spasm (Thos. W. Benson)
  • A.C. for V.T. Filament (Joseph G. Reed)
  • The Radio Constructor: A Simple and Efficient Transmitter (Frederick J. Rumford, EE)
  • High and Low Spark Notes for Amateur Transmitting (E. M. Sargent)
  • Radio Digest
  • Awards of $50 Title Prize Contest
  • “Bad” Radio Business (Arthur H. Lynch)
  • With the Amateurs
  • Club Gossip
  • Correspondence From Readers
  • A Phony Phone (Volney G. Mathison)
  • The Mystery of the Dampt-Undampt Messages (Herbert L. Moulton)
  • Junior Section: Junior Radio Course: The Three-Element Vacuum Tube, 2nd Part
  • Junior Constructor
  • I Want To Know
  • Opportunity Ad-Lets

Experimenter Publishing Company, Inc.
Editor: Hugo Gernsback
Issue: Volume 2: Number 7; January 1921
Pages: 80
Size: 9″ x 12″
Digital edition © 2006 Curtis Philips. All Rights Reserved.

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