...of course, the call sign KYW had itself originated as Chicago's first radio station, in November 1921; Westinghouse had attempted to obtain a 50,000-watt clear channel designation for the station there, with no cooperation from the FRC. Westinghouse decided to buy out WRAX's Philadelphia license on 1020 kHz and moved KYW onto it in December 1934 (WRAX resurfaced on 920 kHz, in a time-sharing arrangement with WPEN, and would be merged into WPEN outright in May 1938). KYW as a TV call sign didn't exist until the Westinghouse-NBC license swap with the Cleveland facility in February 1956; the original call sign of the Channel 3 license in Philadelphia (under Philco ownership until 1953) was WPTZ...