The Main Entrance to the transmitter building
KNBR in San Francisco
One of the truly older, majestic sites, built in 1933, when the station was KPO. As was common in those days, the original antenna was horizontal, between two towers. The auxiliary tower is one of those old towers. The base of the other can still be seen, but the main is a Franklin-style segmented tower. From NBC, the station was sold to Susquehanna, Citadel, and now it is a Cumulus property.
The Main Entrance to the transmitter building
As one might think, this is a site that was manned 24/7 for
years. There are plenty of facilities for sleeping and personal needs,
but they are not much needed these days.
KNBR's Main transmitter, A DX-50
KNBR's Auxiliary: An MW-50
and, just in case... a Nautel 1 as ultimate stand-by
Out in the backyard, some very nice looking towers. The 550 foot tower is
limited due to the nearby San Francisco
International Airport. Hence, the abortive Franklin-style design with a top
load.
KNBR Main Antenna
The top section, where you can see the insulator
31.5 Amps of RF go to the tower, and it is heard all over the Western US
KNBR's Auxiliary Antenna