KSFN (1510 AM) is a commercial radio station broadcasting a Spanish Regional Mexican music radio format. Licensed to Piedmont, California, the station serves the San Francisco Bay Area. The station is currently owned by Alfredo Plascencia's Lazer Broadcasting, through licensee Lazer Licenses, LLC. KSFN's transmitter is in an industrial section of West Oakland, California. History The station was first licensed June 4, 1947, to San Rafael, California, with its transmitter in Kentfield, California, and was owned by Marin Broadcasting Co. The station was originally licensed to broadcast 1,000 watts during daytime hours only. In the station's early years, it aired a full service format, with an hour of jazz weekday afternoons. By 1957, the station aired popular music from the 1930s and 1940s, and an hour of classical music in the morning and afternoon, along with local news and other local programming. The station's transmitter was moved to San Rafael, California in 1960. In 1961, the station began to be simulcast on 100.9 KTIM-FM. In the mid 1970s, the station switched from a MOR format to an album-oriented rock format. The album-oriented rock format continued through the rest of the 1970s and into the early 1980s. In 1980, the station was sold to Platt Communications. The station would end its simulcast with KTIM-FM, and in 1982, the station began airing a big band format. In 1983 the station was sold to Arthur Astor. In 1988, the station's call sign was changed to KCAF, and the station adopted a country music format as "Calf Country". In 1989, the station's call sign was changed to KTID. In 1990, the station's call sign was changed to KAPX, and the station adopted an adult standards format. In 1992, the station's call sign was changed to KTID, and the station simulcast the adult contemporary programming of its sister station KTID-FM. In 1993, the station was bought by Mount Wilson FM Broadcasters Inc. In Spring 1994, KTID (AM) ended its simulcast of adult contemporary KTID-FM and began airing Mt. Wilson FM Broadcasters syndicated adult standards format. On October 12, 1994, the station's call sign was changed to KKHI. As KKHI, it simulcasted the classical programming of KKHI-FM 100.9. In April 1995, the station began broadcasting Big Band Jazz, as KNOB. This occurred after America's last commercial jazz station KJAZ stopped broadcasting in August of the previous year. On February 16, 1997, the station's call sign was