KDIA

KDIA (1640 AM) is a radio station of Baybridge Communications in Vallejo, California. It is a separate entity from the station at 1310 AM that held the KDIA call letters for many years. The 1640 AM frequency was licensed as part of an extension of the AM band in 1998, and adopted the abandoned KDIA call letters then.

During the day it uses one of KKSF (AM)-910's towers. It has a separate night transmitter site.

KDIA 1310 history

The 1310 AM frequency began as KLS in 1921. In 1945, it changed its call letters to KWBR and changed its format to focus on an African-American audience. In 1959, it was bought by the owners of Memphis radio station WDIA, and the call letters were changed to KDIA. During the 1960s through the 1980s, the station was the premier soul and funk station in the San Francisco Bay Area. The station helped launch the careers of such musicians as Sly and the Family Stone. Its tagline at that time was "KDIA, Lucky 13."

For four months in 1984-85 the station was owned by Adam Clayton Powell III, during which time it carried the call letters KFYI and broadcast an all-news format.