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!
Innovative Power Products Passive RF Products - RF Cafe

RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

Rigol DHO1000 Oscilloscope - 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

Crane Aerospace Electronics Microwave Solutions: Space Qualified Passive Products

Day in Engineering History Archive - September 12

Day in Engineering History September 12 Archive - RF CafeSeptember 12

Jack Kilby Builds World's 1st IC - Please click here to visit RF Cafe.1818: Richard Gatling, inventor of the Gatling machine gun, was born. 1869: British physician Peter Roget, best known for his thesaurus but also the inventor of a log-log slide rule and early investigator of sampling phenomena, died. 1888: Richard Proctor, who first proposed that lunar craters are caused by meteors rather than volcanic actions, died. 1923: Jules-Louis-Gabriel Violle, who made the first high altitude measurement of the solar constant and after whom the Violle standard of luminous intensity was named, died. 1956: The first commercial coal pipeline was completed. 1958: Jack Kilby of Texas Instruments invented the integrated circuit. 1959: The Soviet Union launched Luna 2, which on September 13 it became the first space probe to reach the moon. 1961: U.S. patent #3,000,000 was issued to Kenneth Eldredge for an Automatic Reading System. 1962: President John F. Kennedy delivered his famous speech declaring, "We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone..." 1992: Dr. Mae Carol Jemison became the first black woman in space as the payload specialist aboard the space shuttle Endeavor. 1994: A stolen, single-engine Cessna crashed into the South Lawn of the White House. 1995: Two Americans were killed when their hydrogen balloon was shot down by the Belarusian military during an international race. 2013: American physicist Ray Dolby, of noise reduction fame, died.

| 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.

Crane Aerospace Electronics Microwave Solutions: Space Qualified Passive Products
Temwell Filters

Noisecom

Anritsu Test Equipment - RF Cafe