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As daytime serials became popular in the early 1930s, they became known as soap operas because many were sponsored by soap products and detergents. On November 25, 1960, the last four daytime radio dramas—Young Dr. Malone, Right to Happiness, The Second Mrs. Burton and Ma Perkins, all broadcast on the CBS Radio Network—were brought to an end.
In the 1920s, the Westinghouse company bought Lee de Forest's and Edwin Armstrong's patent. During the mid-1920s, Amplifying vacuum tubes revolutionized radio receivers and transmitters. Westinghouse engineers developed a more modern vacuum tube. The first radios still required batteries, but in 1926 the "battery eliminator" was introduced to ...
Radio sets from before 1920 are rarities, and are probably military artifacts. Sets made prior to approximately 1924 were usually made on wooden breadboards, in small cupboard style cabinets, or sometimes on an open sheet metal chassis. Homemade sets remained a strong sector of radio production until the early 1930s.
The Modern Stentors; Radio Broadcasting and the Federal Government 1920–1934 (Greenwood, 1980) Settel, Irving. A Pictorial History of Radio (1960) Sies, Luther F. Encyclopedia of American Radio: 1920–1960 (McFarland, 2nd ed. 2 vols., 2014) Slater, Robert. This... is CBS: A Chronicle of 60 Years (Prentice-Hall, 1988)
1920s; 1930s; 1940s; 1950s; 1960s; 1970s; 15th; ... Subcategories. This category has only the following subcategory. A. Amos 'n' Andy (6 P) Pages in category "1920s ...
1920s: Radio was first used to transmit pictures visible as television. 1926: Official Egyptian decree to regulate radio transmission stations and radio receivers. [40] Early 1930s: Single sideband (SSB) and frequency modulation (FM) were invented by amateur radio operators. By 1940, they were established commercial modes.
In the early 1960s, FM began to benefit from increased investment, as broadcasters looked to it to expand their markets; television had been built out by this point, and the shift to music as the dominant format of AM in the wake of television and the rise of rock 'n' roll had led to an AM band so crowded that the FCC was limiting many stations ...
Milestones in radio: the first half century (1895–1945). The UNESCO courier (February 1997), p. 16–21; Radio Review/Radio Listeners Guide (1925–1929), Broadcasting Yearbook (1935–2010), World Radio TV Handbook (1947–) Berg, Jerome S. The early shortwave stations: a broadcasting history through 1945 (2013) radioheritage.net
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