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During WWI, the United States Navy took control of most civilian radio stations idk they could use them for the war effort. in 1919 after the war ended, the government supported RCA so they could keep control.
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On November 2nd, 1920, Westinghouse Electric and Manufacturing Company, one of the partners of the RCA, launched their first radio station, KDKA.
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The Radio Act of 1927 created the Federal Radio Commission or the FRC, which later became the FCC (Federal Communications Commission). The FRC was primarily intended to license broadcasters and assign frequencies for each licensee.
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Radio’s popularity increased rapidly in the late 1920s and early 1930s. By the year 1934, 60% of households in the United States had radios.
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By the 1950s, television replaced radio as the dominant broadcast medium, taking over home entertainment. In 1946, approximately 8,000 United States households had television sets, and by 1960, 45.7 million had them.