Radio Service Corporation of Utah, and the station's frequency to 1150 kHz. On March 24, 1925, the call letters were changed from KFPT to KSL, and the frequency to 1000 kHz, with the "S" and "L" standing for "Salt Lake". (The KSL call sign had been assigned to a San Francisco station from March 1922 until it was deleted in June 1923.) Earl J. Glade (later a four-term mayor of Salt Lake City) joined the station in 1925 and guided KSL's operations for the next fourteen years. John F. Fitzpatrick, publisher of The Salt Lake Tribune (owned by the Kearns Corporation) acquired a quarter interest of KSL for a modest price, as did the LDS Church. This was the Tribune's first business partnership with the LDS Church, though the Church later reacquired full interest in the station. In 1927, the station moved to 990 kHz. The recently formed Federal Radio Commission adopted General Order 40 in 1928, which included 40 "clear channel" allocations, which were assignments providing for high-powered stations with extensive nighttime coverage. The resulting reallocation was implemented on November 11, 1928, with KSL given one of the "clear channel" assignments, on 1130 kHz. An upgrade from 5,000 to the current 50,000 watts was dedicated October 22, 1932. In March 1941, with the implementation of the North American Regional Broadcasting Agreement, KSL was shifted to 1160 kHz, although it maintained its status as a "clear channel" station. In 1932, KSL joined the CBS Radio Network. It remained with CBS until 2005, when it switched to ABC News Radio. The station gained a television counterpart in 1949, the CBS affiliate KSL-TV. (KSL-TV switched to NBC in 1995 after KUTV Channel 2 came under the ownership of CBS, following its acquisition by Westinghouse). These stations remained subsidiaries of the Deseret News until 1964, when Bonneville International Corporation was formed as the parent company for the LDS Church's broadcasting interests. In the mid-1980s KSL adopted an all-talk format, completely dropping music programming, aside from its Sunday broadcasts of the Tabernacle Choir. KSL-FM There have been two separate stations that have held the KSL-FM call letters. The original KSL-FM debuted in 1946 on the then sparsely-populated FM band at 100.1 (later 100.3) MHz. After simulcasting KSL for a number of years, the FM station switched to a beautiful music format, a contrast to the then-current KSL format of news and talk interspersed with