KWSX (1280 AM) is a broadcast radio station in the United States. Licensed to Stockton, California, the station has a sports format and has been owned by iHeartMedia, Inc. and its predecessors since 1997. KWSX broadcasts the national Fox Sports Radio network for most of the week in addition to play-by-play coverage of local college and professional sports teams, including University of the Pacific men's basketball and Stockton Ports. Founded in 1947 as KXOB, the station had music formats for much of its early history. It was owned by Joseph Gamble Stations for much of the 1950s through 1990s, during which the station changed its call sign to KJOY in 1956 and KJAX in 1989. In 1992, KJAX dropped music to be a full-time news/talk station. The Gamble company sold KJAX in 1996, when the station began the first of several stints simulcasting the talk format of Modesto co-owned station KFIV. In 1999, the station became KUYL, with a change to a Christian religious format following in 2002. Then in 2005, the station picked up its current KWSX call sign, and in early 2006, KWSX changed its religious format to a conservative talk format simulcast with KFIV. In 2018, KWSX adopted its current sports format. History As KXOB (1946–1956) On December 17, 1946, founding company Valley Broadcasting Company (VBC) was granted a construction permit to put a new AM station on the air in Stockton at 1280 with 1,000 watts, directional to the west at night. This new AM station would sign on in the spring of 1947 with the call sign KXOB. The station originally was part of the Mutual Broadcasting System. Other early programming on KXOB included a weekly public affairs program produced with the local Chamber of Commerce, Make Stockton a Better Place to Live, and nationally syndicated college football broadcasts sponsored by the Tide Water Associated Oil Company. Valley Broadcasting sold KXOB in 1952 to a group led by Clem John Randau, a newspaper and radio executive who was owned a minority stake in WNEW in New York City and recently resigned from the Federal Civil Defense Administration, for $200,000. Randau operated KXOB out of the Hotel Stockton. KXOB began broadcasting College of the Pacific football in 1952. Then in 1953, Randau sold KXOB for $207,000 to Joseph E. Gamble, founder of the company Joseph Gamble Stations. As KJOY (1956–1989) On April 1, 1956, KXOB changed