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!
KR Electronics (RF Filters) - RF Cafe

Werbel Microwave (power dividers, couplers)

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

Copper Mountain Technologies (VNA) - RF Cafe

Day in Engineering History Archive - September 21

Day in Engineering History September 21 Archive - RF CafeSeptember 21

TI Introduced the DATAMATH Series of Calculators - Please click here to visit RF Cafe.1853: Dutch physicist Heike Kamerlingh Onnes, who discovered superconductivity, was born. 1866: H.G. Wells, of War of the Worlds fame, was born. 1895: The Duryea Motor Wagon Company became the first auto manufacturer in America. 1895: Juan de la Ciervra, inventor of the autogiro, was born. 1897: The New York Sun ran a famous editorial that answered a question from 8-year-old Virginia O'Hanlon: ''Is there a Santa Claus?'' 1913: The first aerobatic maneuvers were publicly performed by Adolphe Pégoud in his Blériot XI. 1921: Donald Glaser,, who won the Nobel Prize for his invention of the bubble chamber for observing subatomic particles, was born. 1931: Britain abandoned the gold standard. 1936: Frank Hornby, English toy manufacturer who patented the Meccano construction set, died. 1942: The B-29 Superfortress made its maiden flight. 1955: Britain annexed the islet of Rockall, 300 miles west of Scotland, to stop the Soviets spying on missile tests. 1961: Earle Dickson, inventor of the Band-aid, died. 1972: Texas Instruments announced the TI-2500, the TI-3000, and the TI-3500 DATAMATH calculators. 2003: The NASA Galileo space probe ended its eight-year mission to Jupiter as planned.

| 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.

Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

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: AirplanesAndRockets.com

My Daughter's Website: EquineKingdom

everythingRF RF & Microwave Parts Database (h1)

Innovative Power Products Passive RF Products - RF Cafe

Crane Aerospace Electronics Microwave Solutions: Space Qualified Passive Products