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AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands.
The FCC "History Cards" were collections of 5-by-8-inch (13 by 20 cm) index cards, maintained for each AM, FM and TV broadcasting station. They were introduced in early 1927, at the time of the establishment of the Federal Radio Commission (FRC), and were taken over by the Federal Communications Commission (FCC) after its formation in 1934.
Amplitude modulation (AM) was once the main voice mode in amateur radio before being superseded by Single-sideband modulation (SSB). But AM has recently become a nostalgic specialty interest on the shortwave ham bands. [5] A number of AMers operate vintage vacuum tube transmitters in conjunction with separate receivers.
Grand Canyon Gateway Broadcasting, LLC Classic country KYMO: 1080 East Prairie, Missouri: United States Delta Broadcasting, LLC Classic country WARB: 700 Dothan, Alabama: United States Alarado Media, LLC Urban contemporary WATX: 1220 Hamden, Connecticut: United States Clark Smidt Media, LLC Oldies WBBT: 1340 Lyons, Georgia: United States T.C.B ...
Radio Broadcast Stations (FCC) 1/1/1938 Call letters: Radio Broadcast Stations (FCC) Linked site is missing the last two pages Frequency: Radio Broadcast Stations (FCC) State/city: Radio Broadcast Stations (FCC) 1/1/1939 Call letters Radio Broadcast Stations (FCC) Frequency Radio Broadcast Stations (FCC) State/city: Radio Broadcast Stations ...
Class R: VHF, 100 kW low-band (channels 2–6), 325 kW high-band. (channels 7-13) Class S: VHF, more than 100 kW low-band/325 kW high-band. Notes: Official definitions of these classes are difficult to locate. The values above are inferred from the Industry Canada database. There is some ambiguity about the difference between Classes C and D.
Multiple; see Shortwave bands: Mostly AM and single-sideband (SSB) modes high frequency (HF) Very long range through "skipping". Standard time frequencies can be heard here. VHF low 54–88 MHz: vestigial sideband modulation for analog video, and FM for analog audio; 8-VSB or OFDM for digital broadcast very high frequency (VHF) band I
The AM broadcast band in the Philippines is on 531–1701 kHz with 9 kHz spacing (530–1700 kHz with 10 kHz spacing from the American colonial era and post-independence up to 1978), and is predominantly used for news and public service broadcasting. The FM band is the most commonly used broadcast band, with most music radio stations in the ...