➦In 1920...KDKA in Pittsburgh went on the air as the first commercial radio station, a distinction that has also been challenged by other stations (see below), although it has claimed to be the "world's first commercially licensed radio station": WWJ in Detroit, Michigan, lists its "First Air Date" as August 20, 1920.
Listen to announcer Leo Rosenberg, radio's first announcer:
| Frank Conrad's experimental 75-watt transmitter |
| Frank Conrad |
Westinghouse vice president and Conrad’s supervisor, Harry P. Davis, saw the advertisement and recognized the economic potential of radio. Instead of it being limited as a hobby to scientific experimenters, radio could be marketed to a mainstream audience. Consequently, Davis asked Conrad to build a 100-watt transmitter, which would air programming intended to create widespread demand for Westinghouse receivers.
| KDKA 11/2/20 Coverage of Harding-Cox Election |
The KDKA callsign was assigned sequentially from a list maintained for the use of US-registry maritime stations, and on November 2, 1920, KDKA broadcast the US presidential election returns from a shack on the roof of the K Building of the Westinghouse Electric Company "East Pittsburgh Works" in Turtle Creek, Pennsylvania. Four men basically manned that first broadcast: Engineer William Thomas; telephone line operator John Frazier; R.S. McClelland, a standby and Leo Rosenberg, radio’s first announcer.
The election results were relayed to about 1,000 listeners, who learned that Warren Harding beat James Cox in the race for the Oval Office.The original broadcast was said to be heard as far away as Canada. KDKA continued to broadcast from the Westinghouse building for many months.
Soon after its successful election coverage, KDKA upgraded to a 100-watt transmitter.
Early programming often featured live musical performances from a Westinghouse band. KDKA provided its first remote broadcast by airing a choir, live, from the Pittsburg Calvary Baptist Church in January 1921. On January 15, 1921, at 8 p.m., KDKA broadcast a speech on European relief by Herbert Hoover from the Duquesne Club in Pittsburgh that was transmitted ten miles down a telephone line to Westinghouse's East Pittsburgh Works.

















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