KDYA (1190 kHz), "Gospel 1190 The Light", is a commercial AM radio station owned by Salem Media Group and licensed to Vallejo, California, serving the San Francisco Bay Area.

As 1190 AM is a clear channel frequency reserved for Class A KEX in Portland, Oregon, and XEWK-AM in Guadalajara, KDYA must sign off at sunset to avoid interference with these stations.

[6] Taking advantage of this provision, on March 19, 1996, KXBT began to also broadcast on 1640 kHz,[7] as the second U.S. station, following WJDM in Elizabeth, New Jersey, authorized to operate on an expanded band frequency.

On March 22, 1996, the FCC issued an updated list of expanded band allotments, which now assigned KXBT to 1630 kHz, so transmissions were switched to that frequency.

[8] On March 17, 1997, the FCC released a revised roster of eighty-eight expanded band assignments, with KXBT designated to move back to 1640 kHz.