This station signed on the air on March 13, 1968; 56 years ago (March 13, 1968). The original call sign was KMLO. Because 1000 AM is a clear channel frequency, to avoid interference, the station was limited to 1,000 watts and was a daytimer, required to go off the air at night. It was owned by the North County Broadcasting Company.
In 1976, the FCC granted a construction permit to increase the power to 5,000 watts days and 1,000 watts nights. But it had to set up a directional antenna to keep the signal from interfering with Class A stations KNWNSeattle, WMVPChicago and XEOYMexico City, all broadcasting on 1000 kHz.
Tri-Cities Broadcasting, owner of KKOS-FM in Carlsbad (now KSSX), bought KMLO in 1985. It relaunched the station as KKOS AM in January 1986. The call letters changed to KVSD, "The Voice of San Diego," in April.[4]
Business News and Talk
In August 2005, the station began broadcasting a business news format. Until August 2007, KCEO had competition with another business talk station, Cash 1700, with its studios in San Diego and its transmitter in Tecate, Baja California. On August 1, 2007, Cash 1700 became "San Diego 1700." It began airing a talk radio format, while still retaining Ray Lucia and a few other, one-hour business talk shows.
The station switched to the Relevant Radio branding when the two organizations merged on June 30, 2017.[7] It now carries most of the Relevant Radio line-up around the clock.
