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 for Visio | RF Symbols for Visio
RF Symbols for Office | Cafe Press
Espresso Engineering Workbook

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

Noisecom

Copper Mountain Technologies (VNA) - RF Cafe

withwave microwave devices - 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

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

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

KR Electronics (RF Filters) - RF Cafe

Day in Engineering History Archive - January 9

Day in Engineering History January 9 Archive - RF CafeJanuary 9

1793: Jean Pierre Blanchard, using a hot-air balloon, flew between Philadelphia, PA, and Woodbury, N.J. 1848: English astronomer Caroline Herschel, the first woman to discover a new comet, died. 1894: "Edison Kinetoscopic Record of a Sneeze" was released in movie theaters. 1939: The discovery of element Fr (francium) was reported by French chemist Marguerite Perey. 1951: The United Nations headquarters building in NYC officially opened. 1956: Snoopy from the Peanuts comic strip (my favorite) walked on two legs for the first time. 1958: Willis Whitney, who founded the General Electric research laboratory, died. 1986: Kodak exited the instant camera business after losing a patent lawsuit with Polaroid. 1998: Scientists announced the discovery that some galaxies are actually accelerating, flying apart at ever faster speeds. 2007: Apple CEO Steve Jobs announced the first iPhone.

| 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.

KR Electronics (RF Filters) - RF Cafe
Anritsu Test Equipment - RF Cafe

Temwell Filters

Crane Aerospace Electronics Microwave Solutions