On July 31, 1987, 103.7 KLOK-FM in San Francisco changed its call letters to KKSF; more than 18 years later, those KKSF calls are still in place. I know that the FCC’s history page claims that the change happened on 8/8/1987, but I trust Daniel Fuentz, who submitted the final KLOK-FM ID and the first-ever KKSF ID on the 103.7 signal from an aircheck he has of the night of the switch-over.
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