On September 21, 1939, radio station WJSV in Washington, D.C. made an audio recording of its entire 19-hour broadcast day. This undertaking was a collaboration between the station and the National Archives, and it was the first time that such a comprehensive recording of a radio broadcast had been made.
On September 21, 1939, radio station WJSV in Washington, D.C. made an audio recording of its entire 19-hour broadcast day. This undertaking was a collaboration between the station and the National Archives, and it was the first time that such a comprehensive recording of a radio broadcast had been made.
Source: Wikipedia "WJSV broadcast day" · CC BY-SA 4.0
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