KDKA
Westinghouse applied for a callsign in mid-October, 1920. The callsign arrived just in time for the November 2, 1920, election, and the radio station KDKA was born.
The original station was a shack on top of a Westinghouse building in East Pittsburgh. Conrad was not there to witness the historical broadcast, however; worried that the station might go down, he was sitting in his Wilkinsburg garage with his own transmitter as a backup.
Read more about this topic: Frank Conrad