A press release was noted on the Mercury-News Interactive Blog and relates to Radio Station KTRB's beginning of regular broadcasts from the SanFrancisco Bay Area.
In part, the release states:"San Francisco, California (January 31, 2007) - - Something old is new again, as one of Northern California's pioneer radio stations, KTRB-AM 860,makes its historic Bay Area debut by bringing "The San Francisco Sound" backto the nation's fourth-largest radio market beginning Thursday,February 1, 2007.
KTRB-AM 860 was scheduled to sign-on at midnight February 1, and beginning at 6:00a.m. that day, the station will play continuous music reprising the late 60sand early 70s heyday of "The San Francisco Sound"... KTRB-AM 860's permanent format will commence March 1, 2007."Source: http://blogs.mercurynews.com/aei/2007/02/great_news_a_ne.html
(Source: Mike Hardester, Jacksonville, NC)