KSOL (98.9 FM "Que Buena 98.9 y 99.1") is a Spanish language radio station in San Francisco, California. KSQL (99.1 FM) simulcasts the station in Santa Cruz. KSOL and KSQL program a format consisting of regional Mexican music and talk shows. Both stations are owned by TelevisaUnivision USA. Its studios are located at 1940 Zanker Road in San Jose, and the KSOL transmitter is on Mount Sutro. The 98.9 frequency is the third station in the San Francisco market to use the callsign KSOL. The first was the AM rhythm and blues station at 1450 AM (the current KEST). Sly Stone was influential in guiding KSOL into soul music and started calling the station K-SOUL. The second was a popular soul music station (sans the K-SOUL moniker), at 107.7 FM (now known as KSAN). The current KSOL is unrelated to the previous two stations. History The station at 98.9 was established in February 1948 as the FM simulcast component of KJBS 1100 (now KFAX) by Julius Brunton & Sons, transmitting from the (still existing) tower atop Clay Jones Apartments at 1250 Jones Street. As KJBS it had been a full-service station with news, weather, and sports programming, and served as a relay, interrupting programming overnight, to alert police and fire personnel to incidents, prior to the departments' own radio dispatch systems. The FM station was financially unsuccessful, and in 1953 it was sold to CBS. KCBS-FM had been operating with substantially lower power on 103.7 when it made the move to acquire this station. Under CBS it rebroadcast KCBS until 1968 when it began to use the syndicated CBS automated programming, "The Young Sound". Later, it produced its own locally originated rock programming. In September 1978, owner CBS wanted a still more powerful FM assignment, so they arranged a three-station swap that enabled them to be heard on a much stronger signal. KCBS-FM, their format and intellectual property moved to KEAR's 97.3 FM frequency, KMPX moved their big band and swing music format and call letters from 106.9 FM to 98.9 FM, and KEAR moved their Christian-based format from 97.3 FM to 106.9 FM. See also KEAR (AM), KZDG, KFRC-FM, KLLC, and KMPX (FM) The Quake In 1982, KMPX was sold to a New Jersey investor group, administered by general manager Les Elias and station manager Bob Heymann, and flipped to a mainstream rock format as KQAK, "The Quake FM99",