"RHF" wrote in message
om...
BA,

KCBS 740 kHz @ 50KW does NOT use a "DA" in the SF Bay Area is strong
North, East and South. During the Day KCBS has a 'fair' signal and at
Night the signal is strong.

KCBS simply has a different Directional Antenna system. They use 4 towers,
with different patters by day and night.

Simplified, they have a big null over the 0 to 80 degree arc, protecting the
Canadian border.