 On October 19, 1928, the FRC granted Mack's Battery Company a construction permit to move the station to 1430 kHz, followed by a new license for operation on the new frequency on January 31, 1929.WMBS was required to share the 1430 kHz frequency with WBAK and hence it could not be a full-time station.The station's license was transferred by the FRC to Pennsylvania Broadcasting Company effective March 22, 1929, accompanied by a change in call sign to WHP.