 The station's studios are located in Medford and the transmitter site is atop Great Blue Hill.WKAF first went on the air in 1948 as WBET-FM, the sister station of WBET (990 AM, now WBMS 1460) in Brockton (WBET would subsequently buy WBKA 1450 and WBKA-FM 107.1, shut down the WBKA stations, and move its AM facility from 990 to 1460).The two stations almost always simulcast programming for the next 28 years.