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Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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June/July 1940 National Radio News
Table of Contents

June/July 1940 National Radio News

June/July National Radio News Cover - RF Cafe[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 Washing­ton, 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.

Make Extra Profits Changing Push-Button Radios to New Frequencies, by J. A. Dowie 3
Radio Frequencies and Their Allocation 9
Novel Radio Items 15
Advantages of Outdoor Antennas, by Julius G. Aceves 18
Robot Attention Getter 20
Technically Themed Comics 30

 

June/July 1940 National Radio News Table of Contents - RF Cafe

 

 

Posted April 8, 2014