Windfreak Technologies
Res-Net Microwave - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
    Kirt Blattenberger,


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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes App Notes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Homepage Thank you for visiting RF Cafe!
Exodus Advanced Communications Best in Class RF Amplifier SSPAs

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 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.

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

RIGOL Technologies (electronics test equipment) - RF Cafe
withwave microwave devices - RF Cafe
Res-Net Microwave - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free