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 LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor RF Cafe Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Conduct RF Copper Mountain Technologies everything RF Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Lotus Systems PCB Directory Rigol Temwell RF Components TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave Sponsorship Rates RF Cafe Software Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!
RF Electronics Shapes, Stencils for Office, Visio by RF Cafe


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

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench  (shareware)

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Windfreak Technologies Frequency Synthesizers - RF Cafe

National Union Radio and Electronic Tubes
October 1944 Radio News

October 1944 Radio News
October 1944 Radio News Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919-1959. All copyrights hereby acknowledged.

Special Insert: Radio-Electronic Engineering Department

Being the old guy I am, seeing the tag line "No Sweater Girls, Please" in this 1944 National Union Radio and Tubes company advertisement in Radio News magazine reminded me of a comedian's bit about Sweater Girls. The reference could be interpreted as a slight to women of certain physical attributes, but in this case it was a play on a popular theme in Hollywood. The actual message pertained to how contaminant-free National Union kept its vacuum tube assembly areas. Radio News, being by default a men's magazine since in the day most electronics professional and hobbyists were male, and seeing what would today be considered sexist or misogynistic was not uncommon. Take a look at some of the comics that appeared to see what I mean. Most of the jokes were on men though; that kind of humor was also OK back then. Now jokes about men (dare I also specify White men?) are the only socially acceptable form of humor. Since I might already be in deep doodoo, I'll go ahead and repeat that aforementioned comedian's about a gallivanting guy he knows: "That guy no sooner has an innocent sweater girl alone than he's trying to pull the wool over her eyes."

Here is the September 1944 National Union Radio Company ad and also a news item in the November 1944 issue of Radio−Craft magazine..

National Union Radio and Electronic Tubes Ad

National Union Radio and Electronic Tubes, October 1944 Radio News - RF CafeNo Sweater Girls, Please

Electronic tubes are as sensitive to lint, dust and minute particles of foreign matter, as a hay fever sufferer is to pollen. Unless the most stringent precautions are taken to keep tube parts free from impurities, trouble is sure to follow. Trouble - such as noisy receivers ... discoloration or spots on the screen in cathode-ray tubes ... power failure in transmitting tubes.

That is why National Union engineers go the limit to assure absolute cleanliness all along the production line. As an example, the model N. U. cathode spray room, pictured above, is not only clean - it's hospital clean, No fuzzy sweaters or lint-shedding dresses are worn here; There is no dust, no dirt, because it's air-conditioned. Humidity and temperature are precisely controlled. The whole room is washed from ceiling to floor once a week. Then, to make sure, the individual parts are sterilized - some in boiling water - others in special solvents - still others by hydrogen firing.

Even should other factors be equal, the cleaner tube is the better tube. Remember this - and count on National Union.

National Union Radio Corporation, Newark, N.J.

Factories: Newark and Maplewood, N. J.; Lansdale and Robesonia, Pa. 

National Union Radio and Electronic Tubes

Transmitting, Cathode Ray, Receiving, Special Purpose Tubes • Condensers •Volume Controls • Photo Electric Cells • Panel Lamps • Flashlight Bulbs



Posted April 7, 2021

Windfreak Technologies SynthHD PRO - 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 tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

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

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:


Innovative Power Products Passive RF Products - RF Cafe

Amplifier Solutions Corporation (ASC) - RF Cafe

withwave microwave devices - RF Cafe