WABC (AM)
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WABC is a commercial radio station licensed to New York City, carrying a conservative talk radio format known as "Talkradio 77". Owned by John Catsimatidis' Red Apple Media, the station's studios are located in Red Apple Media headquarters on Third Avenue in Midtown Manhattan and its transmitter is in Lodi, New Jersey. Its 50,000-watt non-directional clear channel signal can be heard at night throughout much of the Eastern United States and Eastern Canada. It is the primary entry point for the Emergency Alert System in the New York metropolitan area and New Jersey. WABC simulcasts on WLIR-FM in Hampton Bays, New York, on eastern Long Island.
Original WJZ Newark studio. The microphone is the horizontal cylinder located at the upper right.
The nightly "Man in the Moon" bedtime stories were a popular early feature.
Beginning in May 1923 the WJZ studios and towers were located (along with WJY) at Aeolian Hall in New York City.
Early broadcast chains for WJZ and WEAF, 1926.
AM broadcasting
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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 transmissions, but also on the longwave and shortwave radio bands.
Lee de Forest used an early vacuum-tube transmitter to broadcast returns for the Hughes-Wilson presidential election returns on November 7, 1916, over 2XG in New York City. Pictured is engineer Charles Logwood.
Nellie Melba making a broadcast over the Marconi Chelmsford Works radio station in England on 15 June 1920
Farmer listening to U.S. government weather and crop reports using a crystal radio in 1923. Public service government time, weather, and farm broadcasts were the first radio "broadcasts".
1938 Zenith Model 12-S vacuum-tube console radio, capable of picking up mediumwave and shortwave AM transmissions. "All Wave" receivers could also pick up the third AM band: longwave (LW).