In mid-December 1927, it was announced that the National Battery Company had received permission from the Federal Radio Commission (FRC) to build a new station, with the call letters KSTP, operating from a transmitter site to be constructed three miles south of Wescott. The next month it was reported that the new station, still under construction, had been assigned to 1360 kHz. KSTP made its debut broadcast on March 29, 1928. Although technically it was a separate station from WAMD and KFOY, both of which were formally deleted on April 30, 1928, overall KSTP was treated as the direct successor to a consolidated WAMD and KFOY.