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On January 5, 1940, Armstrong, working with the Yankee Network, demonstrated FM broadcasting in a long-distance relay network, via five stations in five states. [ 5 ] In May 1940, largely as the result of Armstrong's efforts, the FCC decided to eliminate the Apex band, and authorized an FM band effective January 1, 1941, operating on 40 ...
On May 24, 1940, the FCC had announced the establishment, effective January 1, 1941, of an FM radio band operating on 40 channels spanning 42–50 MHz, with the first five channels (42.1 to 42.9 MHz) reserved for educational stations, and the other 35 (43.1 to 49.9 MHz) available for commercial operation. [1]
List of FM radio stations in the United States by call sign (initial letters KK–KM) List of FM radio stations in the United States by call sign (initial letters KN–KP) List of FM radio stations in the United States by call sign (initial letters KQ–KS) List of FM radio stations in the United States by call sign (initial letters KT–KV)
In May 1940, the FCC authorized the creation, effective January 1, 1941, of an FM broadcasting band operating on forty 200-kHz wide channels spanning 42–50 MHz, with the first five channels reserved for non-commercial educational stations, and the other 35 available for commercial stations. [133]
The following is a list of radio stations formerly owned by NBC via parent company RCA from 1926 until 1989. NBC formerly operated two radio networks in the United States: the NBC Radio Network from 1926 until 1987 (known as the NBC Red Network from 1926 to 1942) and the NBC Blue Network from 1926 until 1943 (known as the Blue Network from 1942 to 1945 and the American Broadcasting Company ...
DA1 means the pattern is always directional, with the same pattern, day and night. DA2 means the station has two different patterns (protecting different stations), one for Day, and one for Night. DAN means the station broadcasts omnidirectionally (equal in all directions) Day, and directionally at Night. Call sign Frequency Community of License
The first shortwave station in Europe. 25 June 1926 (test transmissions began), and the first shortwave station in the world with its own dedicated programming rather than being a simulcast of an AM/MW or LW station such as KDKA. Regular broadcast from 30 May 1927 to May 1940 when the station went dark due to the German occupation of Holland ...
The following is a list of the FCC-licensed radio stations in the United States Commonwealth of Massachusetts, which can be sorted by their call signs, frequencies, cities of license, licensees, and programming formats.