KOSF

KOSF, known as "Big 103.7", is a classic hits radio station in San Francisco, California. The station is owned and operated by iHeartMedia. The station's studios are located in the SoMa district of San Francisco, while the transmitter is based atop San Bruno Mountains.

History

The former ABC Radio-owned station started on November 3, 1947 as KGO-FM. In earlier days, it simulcast its AM sister station of the same name, occasionally airing a stereo version of the Lawrence Welk show. By the late 1960s, as FM stations were required to offer separate programming from that of their AM sisters, KGO-FM, like other ABC-owned FM stations, was an outlet for ABC Love, an automated progressive rock format.

KGO-FM became KSFX in early 1971, and continued in a progressive rock format until May 1973. Then, KSFX ran a top 40 "Musicradio" approach, similar to WABC in New York. By late 1974, the station veered towards a Dance/Soul-flavored format. During the late 1970s, KSFX had a brief run with a disco format.

KKSF (AM)

KKSF (910 AM) is a radio station in San Francisco, Oakland, and San Jose, California. The station is owned by iHeartMedia, Inc..

The 20,000 watt transmitter and twin towers are located on Point Isabel in Richmond, California, on San Francisco Bay.KDIA utilizes one of KKSF's two towers during the day. KKSF has studios in San Francisco's SoMa district.

History

KLX

The Oakland station debuted as KLX on May 3, 1922 (or July 25, 1922, some say), with 5 watts of power, increased over the years. KLX was owned for three decades by Joseph R. Knowland, owner and publisher of the Oakland Tribune. From 1923 the KLX studios were in the Oakland Tribune Tower at Thirteenth and Franklin streets, and the transmitter was on the roof. In 1952 the transmitter was moved to the San Francisco Bay shoreline and increased to 5,000 watts. In late 1956, KLX moved to the Bermuda Building on Franklin Street.

In 1959 (in part to pay off campaign debts related to U.S. Senator William Knowland's unsuccessful 1958 campaign for California governor), the Knowland family sold KLX to the former publisher of Collier's magazine (which had ceased publication in December 1956).