Shown in the black-and-white photo are
staff members of KSFO in San Francisco, standing in front of the station’s brand-new
transmitter plant, located on Islais Creek in the southeast part of the city.
courtesy of Penny Wilkes and Art Leberman
The Blaw-Knox tower on the roof of the
building is for the station’s 5 kW AM signal on 560 kHz. The four sets of
transmission lines moving off to the left are for KWID, the 100 kW shortwave
station that KSFO owner Wesley I. Dumm built in 1942 at the request of the
government. Its curtain antennas were supported by wooden poles off to the left
of the photo. Its signals were heard throughout the Pacific during World War
II, making the station a critical link for war news and government information.
The station eventually became part of the Voice of America after the war.
The identities of most of the people
are not known (can you help?), but they are wearing picture ID cards, probably
a wartime security measure.
The KSFO transmitter building is still
in use, as seen in the recent photo. There is now a rendering plant where the
shortwave antennas were located.
John Schneider is a lifelong radio
history researcher. Write the author at email@example.com. This is one in a
series of photo features from his collection. Find more under the Columns/Roots
of Radio tabs at radioworld.com.