Search RFCafe.com                           
      More Than 18,000 Unique Pages
Please support me by ADVERTISING!
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™ Please Support My Advertisers!
   Formulas & Data
Electronics | RF
Mathematics
Mechanics | Physics
     AI-Generated
     Technical Data
Pioneers | Society
Companies | Parts
Principles | Assns


 About | Sitemap
Homepage Archive
        Resources
Articles, Forums Calculators, Radar
Magazines, Museum
Radio Service Data
Software, Videos
     Entertainment
Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes
   Parts & Services
1000s of Listings
 Vintage Magazines
Electronics World
Popular Electronics
Radio & TV News
QST | Pop Science
Popular Mechanics
Radio-Craft
Radio-Electronics
Short Wave Craft
Electronics | OFA
Saturday Eve Post

Software: RF Cascade Workbook
RF Stencils Visio | RF Symbols Visio
RF Symbols Office | Cafe Press
Espresso Engineering Workbook

Aegis Power  |  Alliance Test
Centric RF  |  Empower RF
ISOTEC  |  Reactel  |  RFCT
San Fran Circuits

KR Electronics (RF Filters) - RF Cafe



Temwell Filters

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

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

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Advertise your products and services on RF Cafe

Day in Engineering History Archive - November 25

Day in Engineering History November 25 Archive - RF CafeNovember 25

First Ad Appeared for a Wireless Telegraph Set - RF Cafe1792: The Old Farmer's Almanac was first published. 1844: Karl Benz, a German mechanical engineer who designed built the world's first practical auto powered by an internal-combustion engine, was born. 1905: The first U.S. advertisement for a complete radio set, the "Telimco Wireless Telegraph Outfit," appeared in this day's issue of Scientific American. 1920: The first play-by-play broadcast of a football game (between the University of Texas and Texas A&M) was aired in College Station, TX. 1948: Cable television was invented by Ed Parsons. 1958: Charles Kettering, co-founder of Delco Products and inventor of the electric starter and spark plugs for cars, died. 1973: The maximum speed limit in the U.S. was cut to 55 mph as an energy conservation measure during oil embargo. 1975: Robert Ledley granted a patent for a "diagnostic X-ray systems," known as CAT scans.

| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |

Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in this article, there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative sources. On RF Cafe, events with hyperlinks have been verified. Many years ago, I began commemorating the birthdays of notable people and events with special RF Cafe logos. Where available, I like to use images from postage stamps from the country where the person or event occurred. Images used in the logos are often from open source websites like Wikipedia, and are specifically credited with a hyperlink back to the source where possible. Fair Use laws permit small samples of copyrighted content.

Advertise your products and services on RF Cafe
ConductRF Phased Matched RF Cables - RF Cafe



Exodus Advanced Communications Best in Class RF Amplifier SSPAs