Radio amateur microphone hookups and simple interhouse phone circuits
The article outlines methods to link microphones with radio gear to relay broadcasting over a wire between houses. It describes simple, in series circuits with batteries and headphones, a two-end battery setup with opposing connections, and using a microphone to drive a transformer and loudspeaker. It warns that using a telephone mic with regenerative receivers for radiophone transmission is illegal and could cause interference and arrest.
MENTIONED IN THIS ARTICLE
Ordin
Fragmentary OCR Item Summary
A partial newspaper fragment offers few readable names or dates and hints at a local event. The legible words suggest a historical note but lack clear subjects or outcomes for a full summary.
Interest Aroused in New Kaufman Circuit
Radio circles in the East show considerable interest in Wolff Kaufman’s new circuit. The design introduces two departures from standard practice including a tapped 80 turn coil and a variable grid leak for plate grid coupling, combining prior developments into a practical stage.
MENTIONED IN THIS ARTICLE
New Kaufman Circuit
Kaufman
Wolff Kaufman
Mounting Panels on Aluminum Angles
Amateurs often struggle mounting unit panels so the article proposes using aluminum angles. Panels are 41 percent four inches square mounted in a row on 3/4 inch by 1/8 inch angles. For six panels use four 18 1/4 inch lengths. Aluminum angles cost about ten cents per foot and allow a neater, more compact setup with shorter leads.
What Is Said by Those Who Listen
William H. Easton discusses the challenges faced by radio program planners. He notes audience letters demand infinite variety and constant improvement, and highlights interference as the key threat to broadcasting’s future.
MENTIONED IN THIS ARTICLE
William H. Easton
Radio Public
Mike
Professor Simpkins
KDKA
Thousands Have Kidney Trouble and Never Suspect It
Drugstore reports indicate many people suffer kidney trouble unknowingly. Dr Kilmer s Swamp Root is promoted for relief and claims high success. An insurance examiner notes kidney disease causes many applicants to be declined, often without awareness. Samples offered by mail order with a small fee.
MENTIONED IN THIS ARTICLE
Kilmer
Also Mentioned on This Page
v_igins Wardrop
Radio Merchandising
Kredio Telephone
Ine
Dven
Eller
Eadend Eel Yan
Lings
Sonia
Bayer
Buffalo Evening Times
Allen
Army
Navy
Cme
le Roy
N. Y
Lathrop
G Haarlem Oil AZ
Danaruff
Ibaby
Ratory
Berkeley
U.S
California
Lincoln
Northwestern Yeast Co
Ashland Ave
Chicago, NL
America
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