 Studios were housed on the top floor of SLU's Law School (currently O'Neil Hall), and the transmitter tower, which would be torn down in 1954, was located roughly where Pius XII Memorial Library now stands.Brother George E. Rueppel continued active participation with the station until his death in 1947, serving at times as "engineer... station manager, program director, continuity writer, platter turner, announcer, talent scout, auditioner, and star performer".The University was the first in the St. Louis area to receive a permit for an FM station, which was initially authorized in 1941 with the call sign K51L, transmitting on 45.1 MHz.