The station at 93.5 FM, licensed to Redondo Beach, California, signed on in 1961 as KAPP-FM and was owned by South Bay Broadcasting Company. The license was granted after the applications for KPOL-FM and KNX-FM were denied. Chuck Johnson and Lonnie Cook came to KAPP-FM from KTYM-FM (103.9 FM) in Inglewood. The frequency was shared as the signal's programming came from Redondo Beach in the daytime, and the pop, blues, doo wop, and jazz format being aired by Johnson and Cook (from Johnson's home) at night. It has been determined that their FM top 40 chart is the oldest one known to exist.