The towers and transmitter are off Claribel Road in Paulsell, California, about 15 miles (24 km) east of Modesto.
KTRB had operated from Modesto since 1933, but had just signed off the previous month in preparation for a move to the San Francisco Bay Area.
[3][4] It later returned to air with brokered programming provided by Paulino Bernal Evangelism of Texas.
On July 30, 2014, Immaculate Heart Radio's Catholic programming began airing on KMPH.
KMPH flipped to the Relevant Radio network programming when IHR Educational Broadcasting and Starboard Media Foundation consummated their merger on June 30, 2017.