RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel
RF & EE Symbols Word
RF Stencils for Visio

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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

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Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes RF Cascade Workbook RF Stencils for Visio Shapes for Word Thank you for visiting RF Cafe!

Day in Engineering History Archive - April 19

April 19

Happy Birthday, Melanie! - Please click here to visit RF Cafe.

1775: The Battles of Lexington and Concord, the first military engagements of the American Revolutionary War including "the shot heard round the world," were fought. 1831: German physicist Johann Gottlieb Friedrich von Bohnenberger, inventor of the gyroscope, died. 1877: Ole Evinrude, of outboard motor fame, was born. 1906: Nobel laureate Pierre Curie, who along with his wife, Marie, discovered spontaneous radioactivity in radium and polonium, died. 1948: The ABC television network went on the air for the first time. 1961: My lovely wife, Melanie, was born - Happy Birthday! 1975: India launched its first satellite, Aryabhata, with aid from the USSR. 1989: Pro-Democracy demonstrations began in Beijing's Tiananmen Square. 1993: Attorney General Janet Reno ordered the raid on the Branch-Davidian compound in Waco, TX, that resulted in the death of 86 men, women and children. 1995: A truck bomb, driven by Timothy McVeigh and an unidentified passenger, exploded outside the Alfred P. Murrah Federal Building in Oklahoma City, killing 168 people, and injuring 500.

| 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.
Please submit significant historical events and dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death date ;-) A couple 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.