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 Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes USAF radar shop Notable Quotes App Notes Calculators Education Engineering Magazines RF Cafe Software,T-Shirts,Coffee Mugs Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Stencils for Visio RF & EE Shapes for Word Advertising RF Cafe Homepage Sudoku puzzles Facebook Test notes Thank you for visiting RF Cafe!
MECA Electronics

Day in Engineering History Archive - April 30

April 30

Happy Birthday to Happy Birthday Johann Carl Friedrich Gauss!  Please click here to visit RF Cafe.Day in Engineering History April 30 Archive - RF Cafe1777: German mathematician and experimenter in magnetism Carl Friedrich Gauss was born. 1897: J.J. Thomson first announced the existence of electrons at the Royal Institution Friday Evening Discourse. 1900: Famous railway engineer Casey Jones met his end in a collision with another train crossing his track. 1945: As Russian troops approached his Berlin bunker, Adolf Hitler committed suicide along with his wife of one day, Eva Braun. 1955: Mendelevium, element 101, was announced. 1964: The FCC ruled that all TV receivers should be equipped to receive both VHF (channels 2-13) and the new UHF (channels 14-83). 1975: The Vietnam War ended when the government in Saigon announced its unconditional surrender to the Vietcong - a slaughter ensued thereafter. 1997: London's Big Ben ground to a halt for hours. 2001: California businessman Dennis Tito arrived at the international space station aboard a Russian spacecraft.

| 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.

Triad RF Systems ConductRF D38999 RF Cables - RF Cafe
Rohde & Schwarz USA (RF Component Pocket Guide) - RF Cafe Axiom Test Equipment - RF Cafe
About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2018
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