Radio News (02:11) May 1921

This is the May 1921 issue of Radio News. The cover art is recreated from a photo (With the Amateurs article) sent in by a reader showing his dog listening to “his master’s voice.” Other articles cover new radio legislation, the expiration of a Marconi patent, new double-grid vacuum tube radio circuits, a long-range receiver, and part 4 of the Who’s Who in Radio series featuring Greenleaf Whittier Pickard.

Contents of this Issue:

• Editorial: New Radio Legislation (H. Gernsback)
• The Resonance Wave Coil (S.R. Winters)
• A New Type of Variometer (E.B. Landon)
• An Inexpensive C.W. Transmitter (Arthur H. Lynch)
• New Device to Obtain A.C. From a D.C. Source (D.R. Clemons)
• The Design and Construction of an Efficient Detector Amplifier (Cyril T. Atkinson)
• Marconi Patent Expires (Thomas Appleby)
• The Latest in Automatic Transmitters
• Some New Circuits for Radio-Telegraphy Employing a Double-Grid Vacuum Tube (John Scott-Taggart)
• Recent Developments in Loop Aerials
• Some Operating Characteristics of Electron Tubes (W.C. White, E.E.)
• Simple Measurements and Calculations for the Amateur Station Owner (P.R. Geagan)
• Remote Control Antenna Switch (Norman A. Nyquist)
• 2AD Explains
• Winding Duo-Lateral Coils (Victor Andrew)
• A Long Range Receiver (Joseph G. Reed)
• Long Distance Hook-Up (William Bessey)
• Conduction of Electricity Thru Vacuum and Gases With Applications to Design of Radio Apparatus (E.M. Sargent) Part Two
• Radio Digest
• Who’s Who in Radio: Greenleaf Whittier Pickard, A.A.A.S.
• Unnecessary Interference (Charles Reberger)
• Correspondence from Readers
• The Radio Constructor: A Honeycomb Coil Tuner (Paul G. Watson)
• Portable Radiofone Set (Robert I. Toran)
• Improved Homemade “B” Battery (Adam Kristiniak, Jr.)
• Some Practical Radiofone Experiments (G. Ridleak, V.T.)
• The Death Dash (“Sparks”)
• With the Amateurs: J.E. Brown’s Station
• Junior Section: Junior Radio Course: Radiotelefony
• Junior Constructor
• A New Radio Bill
• Club Gossip
• I Want To Know
• Opportunity Ad-Lets