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 Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave 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

LadyBug RF Power Sensors

Cafe Press

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

Windfreak Technologies Frequency Synthesizers - RF Cafe

Day in Engineering History Archive - December 23

Day in Engineering History December 23 - RF CafeDecember 23

1790: French archaeologist Jean-François Champollion, who first deciphered the Rosetta Stone, unlocking the language of ancient Egypt, was born. 1823: The poem "A Visit from St. Nicholas" by Clement C. Moore ("'Twas the Night Before Christmas...") was published. 1870: Thomas Edison was issued a patent for an "Improvement in Magneto Electric Machines." 1880: Thomas Edison incorporated the Edison Electric Light Company of Europe. 1939: German aircraft designer Anthony Fokker, creator of the Red Baron's famous DR-1 triplane, died. 1973: Gerard Kuiper, who discovered Miranda, a moon of Uranus, and Nereid, a moon of Neptune, and after whom the Kuiper Belt is named, died. 1975: The Metric Conversion Act of 1975 was signed into law. 1986: The experimental airplane Voyager, piloted by Dick Rutan and Jeana Yeager, completed the first non-stop, around-the-world flight without refueling as it landed safely at Edwards AFB in CA.

| 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.

Windfreak Technologies Frequency Synthesizers - RF Cafe
Rigol DHO1000 Oscilloscope - RF Cafe

Noisecom

Innovative Power Products Passive RF Products - RF Cafe