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Radio broadcasting has been used in the United States since the early 1920s to distribute news and entertainment to a national audience. In 1923, 1 percent of U.S. households owned at least one radio receiver, while a majority did by 1931 and 75 percent did by 1937.
The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of broadcasting.
Consisted of 27 stations (3 owned and operated and up to 24 "phantom stations" – time leased on affiliated radio stations. WEAF chain: Broadcasting Company of America: Northeast and Midwest United States 1923–1926 Regional network of AT&T-owned radio stations with New York City radio station WEAF as its hub.
American Radio Archives and Museum offers one of the largest collections of radio broadcasting in the United States and in the world. [12] It has a collection of 23,000 radio and TV scripts, 10,000 photographs, 10,000 books on radio history, and 5,000 audio recordings.
In the United States, FM broadcasting stations currently are assigned to 101 channels, designated 87.9 to 107.9 MHz, within a 20.2 MHz-wide frequency band, spanning 87.8–108.0 MHz. In the 1930s investigations were begun into establishing radio stations transmitting on "Very High Frequency" (VHF) assignments above 30 MHz.
In the United States, iBiquity's proprietary HD Radio has been adopted and approved by the FCC for medium wave transmissions, [94] while Digital Radio Mondiale is a more open effort often used on the shortwave bands, and can be used alongside many AM broadcasts. Both of these standards are capable of broadcasting audio of significantly greater ...
Defunct radio stations in the United States (3 C, 1,296 P) Z. Zenith Electronics (1 C, 5 P) Pages in category "History of radio in the United States"
Radio stations in United States have evolved since their early twentieth-century origins. In 1920 8MK started operations in Detroit; after it, thousands of private and public radio have operated in the United States.