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The show featured top entertainment and became one of the most popular and acclaimed regular radio programs of the era. At its peak in 1929, the company employed over 12,000 workers manufacturing nearly one million radio sets. Its models included the metal-cabinet seven-tube Model 57 at US$105 and the wooden-cabinet eight-tube Model 60 at US$80 ...
With the invention of the rectifier tube, which made it practical to power radios by electrical outlets, in 1928, Philco entered the radio business. [2] They followed other radio makers such as RCA, Atwater-Kent, Zenith Electronics, Freshman Masterpiece, FADA Radio (Frank A. D'Andrea Radio), and AH Grebe into the battery-powered radio business ...
The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.
To promote its radio sales, Grigsby-Grunow sponsored The Majestic Theater of the Air musical show on the CBS radio network beginning in October, 1928. [11] [12] By 1928, the company enjoyed booming sales and had become the second largest U.S. radio manufacturer, behind RCA and ahead of Atwater-Kent. [13]
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Although the patent cross-licensing agreements had been intended to give the participants domination of equipment sales, the tremendous growth of the market led to fierce competition, and in 1925 RCA fell behind Atwater Kent as the leader in receiver sales. RCA was particularly hamstrung by the need to coordinate its sales within the limits of ...
Guglielmo Marconi, who built the first radio receivers, with his early spark transmitter (right) and coherer receiver (left) from the 1890s. The receiver records the Morse code on paper tape Generic block diagram of an unamplified radio receiver from the wireless telegraphy era [4] Example of transatlantic radiotelegraph message recorded on paper tape by a siphon recorder at RCA's New York ...
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