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!
PCB Directory (Manufacturers)

Innovative Power Products Passive RF Products - RF Cafe

RF Electronics Shapes, Stencils for Office, Visio by 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

Anritsu Test Equipment - RF Cafe

Day in Engineering History Archive - May 15

Day in Engineering History May 15 Archive - RF CafeMay 15

Peace Officers Memorial Day - Please click here to visit RF Cafe.Today is Peace Officers Memorial Day. 1618: Johannes Kepler discovered his harmonics law. 1836: Francis Baily observed "Baily's Beads" during an annular solar eclipse. 1863: Frank Hornby, English toy manufacturer who patented the Meccano construction set, was born. 1859: Nobel laureate Pierre Curie, who along with his wife, Marie, discovered spontaneous radioactivity in radium and polonium, was born. 1930: Ellen Church became the first airline stewardess. 1941: Britain's first jet-propelled aircraft, the Gloster-Whittle E.28/39, made its first flight. 1948: Israel was attacked by Transjordan (now Jordan), Egypt, Syria, Iraq and Lebanon only hours after declaring its independence. 1957: Great Britain became the 3rd nation to detonate a nuclear bomb. 1970: President Nixon appointed America's first two female generals: Colonels Elizabeth Hoisington and Anna Mae Mays. 1992: Robert Morris Page, inventor of pulse radar, died. 2008: Physics Nobel laureate Willis Lamb, who determined fine structure of the hydrogen spectrum, 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.

Anritsu Test Equipment - RF Cafe
everythingRF RF & Microwave Parts Database (h1)

Amplifier Solutions Corporation (ASC) - RF Cafe

Cafe Press