On Christmas Eve, 1946, the station signed on as KPRC-FM. It was owned by the Houston Post daily newspaper, which also owned KPRC and would put KPRC-TV on the air in 1949.
On December 24, 1946, KPRC-FM started transmitting. It was owned by the Houston Post daily newspaper, which also operated KPRC and intended to launch KPRC-TV in 1949.