NBC also expanded its broadcasting interests in Cleveland beyond AM radio: on October 31, 1948, NBC launched a sister television outlet, WNBK, on channel 4; a few weeks later, on December 6, 1948, WTAM-FM (105.7 FM) began broadcasting, simulcasting WTAM's programming. All three stations shared the same transmitter tower in Brecksville until WNBK moved to a new transmitter tower erected in Parma concurrent with a channel switch to channel 3 on April 25, 1954; as KYW and KYW-FM, both radio stations would move to the same Parma tower in February 1957.