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for KNBR (Radio station : San Francisco, Calif.)
Biography"KNBR is a San Francisco, California AM radio station, broadcasting on a clear channel at 680 kHz from transmitting facilities near Belmont, California. KNBR's non-directional 50,000-watt class-A signal can be heard throughout much of the western United States and as far west as the Hawaiian Islands at night. For several decades, KNBR enjoyed a long history as the flagship station of NBC's West Coast radio operations. Between the three stations, games of the San Francisco Giants, San Francisco 49ers, Oakland Panthers and Stanford Cardinal are broadcast to the San Francisco Bay Area." -- Wikipedia The call sign originated in 1962.