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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Day in Engineering History Archive - December 23

December 23

1st Manned Orbit of the Moon by Apollo 8.  Please click here to visit RF Cafe1790: French archaeologist Jean-François Champollion, who first deciphered the Rosetta Stone, unlocking the language of ancient Egypt, was born. 1823: The poem "A Visit from St. Nicholas" by Clement C. Moore ("'Twas the Night Before Christmas...") was published. 1870: Thomas Edison was issued a patent for an "Improvement in Magneto Electric Machines." 1880: Thomas Edison incorporated the Edison Electric Light Company of Europe. 1939: German aircraft designer Anthony Fokker, creator of the Red Baron's famous DR-1 triplane, died. 1968: Astronauts on Apollo 8 became the first men to orbit the Moon, and took the famous "Earthrise" photo. 1973: Gerard Kuiper, who discovered Miranda, a moon of Uranus, and Nereid, a moon of Neptune, and after whom the Kuiper Belt is named, died. 1975: The Metric Conversion Act of 1975 was signed into law. 1986: The experimental airplane Voyager, piloted by Dick Rutan and Jeana Yeager, completed the first non-stop, around-the-world flight without refueling as it landed safely at Edwards AFB in CA.

| 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.