Radio Broadcast (May 1929-Apr 1930)

Record Details:

Title:
Radio Broadcast
Date:
May 1929-Apr 1930
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
000179
Language:
English
Subjects:
radio periodical, Radio -- Periodicals
Contributor:
Library of Congress, MBRS, Recorded Sound Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Radio Broadcast supported home listeners of the new technology of radio – for building or buying a receiving set to explaining the technology used by the new radio stations. Throughout the magazine shows the cultural influence of radio as it evolved from hobbyist to mainstream. -- David Pierce, 2011
Date Added:
September 29, 2022
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RADIO BROADCAST. No. 27 Radio Broadcast' 's Set Data Sheets THE MAJESTIC MODEL 180 RECEIVER July, 1929 Three stages of r.f. amplification are used in this Majestic receiver. The inductance associated with the antenna circuit is arranged so that it can be varied somewhat in order that this circuit may be brought into exact resonance with the other tuned circuits. It should be noted that heater -type tubes are used throughout the set except in the power stage. It is also interesting to note that the phonograph pick-up unit is connected across the small tapped section of the first audio-frequency transformer. 30,000 ohms 20 ohms. Red Brown Orange Brown 7.5 V. 6 6 G. PU. Orange Blue ■ 7.5 V. Red ■ 2.5 V. 90 130 V. THE COLONIAL MODEL 31 A.C. RECEIVER This receiver utilizes six a.c. tubes and a 280-type rectifier. It consists of two stages of r.f. amplification, a detector, and two stages of a.f. amplification, the output stage being push pull. Two re sistors, not indicated in the diagram but connected in series with the lead to the light socket, function as automatic voltage controls. The 30-ohm variable resistor is a hum adjustment. Ant Switch G$ o.5 Hhdr-^i 4^ n 6 1.0 70 ohms 8.0 "vwvyw — fit1 1250 ohms Tt*> • JULY • 1929 • • 159