 The call letters were immediately changed to WBUT-FM, with the two stations simulcasting one another until the Federal Communications Commission (FCC) enacted new rules in 1965 which called for combination license holders to offer unduplicated programming at least half of the broadcast day.The stations continued to simulcast part-time throughout the early 21st century.The stations were purchased by Larry Berg in 1964, who did business as WBUT, Inc.