On November 1, 1943, the station was assigned the WIP-FM call sign. After the FCC created the current FM broadcast band on June 27, 1945, Pennsylvania Broadacasting applied to the FCC for a construction permit on October 24, 1946 to install a new transmitter and antenna for operation on 97.5 MHz. On July 10, 1947, the FCC reallocated the station to 93.3 MHz, modifying the construction permit. The commission granted Pennsylvania Broadcasting a new license for the station for operation on 93.3 MHz on December 22, 1948.