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

Innovative Power Products Cool Chip Thermal Dissipation - RF Cafe

LadyBug RF Power Sensors

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

DC-70 GHz RF Cables - RF Cafe

Day in Engineering History Archive - May 11

Day in Engineering History May 11 Archive - RF CafeMay 11

1st Public Demo of VisiCalc. Click here to return to the RF Cafe homepage.1811: Urbain-Jean-Joseph Le Verrier, who calculated the likely position of Neptune so closely that it took Johan Galle only an hour of search to find, was born. 1875: Harriet Quimby, the first female pilot to fly across the English Channel, was born.1881: Theodore von Kármán, who designed the Bell X-1 supersonic airplane, was born. 1924: Nobel astronomer Antony Hewish, the discoverer of pulsars, was born. 1928: Radio station WGY, in Schenectady, NY, began America's first regularly scheduled TV broadcasts. 1934: The Dust Bowl began with strong winds stripping topsoil off of farm fields in the Great Plains. 1946: Dr. Robert Jarvik, inventor of the first artificial heart intended as a permanent replacement (and married to super genius IQ Marilyn vos Savant), was born. 1997: IBM's Deep Blue computer defeated world chess champion Garry Kasparov. 1951: Jay Forrester filed a patent application for the matrix core memory. 1979: The VisiCalc spreadsheet program was announced. 1997: IBM's Deep Blue supercomputer defeated Garry Kasparov, becoming the first computer to beat a world-champion chess player. 1998: A French mint produced the first coins of Europe's single currency: the Euro. 2021: U.S. patent #11,000,000 was awarded for a Prosthetic Heart Valve apparatus.

| 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.

DC-70 GHz RF Cables - RF Cafe
Exodus Advanced Communications Best in Class RF Amplifier SSPAs

Windfreak Technologies Frequency Synthesizers - RF Cafe

withwave microwave devices - RF Cafe