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June/July 1940 National Radio News
 [Table
of Contents] These articles are scanned and OCRed from old editions of the
National Radio News magazine. Here is a list of the
National Radio News articles I have already posted. All copyrights are hereby acknowledged. |
June/July
1940
Vol. 9, No. 3
Our Cover Photograph
The Columbia Broadcasting System has recently dedicated their newest transmitter,
for Washing-ton, D. C., thus giving the Nation's Capital one of the fifty kilowatt
broadcasting stations, which is the maximum power for the United States. The photo
on the cover of this issue of the News shows Mr. John Palmquist (WJSV's control
room supervisor, at left) and William Kriz (WJSV's transmitter supervisor) demonstrating
to the cameraman how simply and quickly one of the big mercury vapor rectifier tubes
of the three phase full wave bridge type 200 kilowatt power rectifier unit can be
replaced. This picture not only shows you how large rectifier tubes are changed
in case of tube failure, but also how they are mounted in their respective positions
on the rack. Of course, no one is permitted to enter the power room or section when
high voltage is turned on.
Posted April 8, 2014
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