RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
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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 - September 21

September 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. The TI-2500  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.
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.