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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 12

December 12

Marconi sent 1st transatlantic radio message: dit, dit, dit - RF Cafe1685: John Pell, who introduced the division sign (the obelus, ÷) to England, died. 1894: American engineer Philip Drinker, who invented the iron lung, was born. 1899: The first U.S. patent for a golf tee was issued to George Grant. 1901: Guglielmo Marconi transmitted first long distance communication, dit-dit-dit ("s"), using "Hertzian" waves. 1921: Astronomer Henrietta Swan Leavitt, who discovered the relationship between period and luminosity in Cepheid variables, died. 1927: Robert Noyce, co-inventor of the integrated circuit and nicknamed "the Mayor of Silicon Valley", was born. 1961: The first satellite put in orbit built by private citizens, the 10-lb Oscar I ("Orbiting Satellite Carrying Amateur Radio") was launched. 1971: American communications pioneer and RCA's first general manager, David Sarnoff, died. 1980: Computer Software Act of 1980 defined computer programs and clarified extent of protection afforded software. 1994: IBM said it would halt shipments of Pentium computers because of the "floating point" bug in the Pentium chip. 2005: RFMD was recognized as 'Electronics Company of the Year' by the NCTA. 2005: Panasonic announced that it would withdraw from the GSM handset market.

| 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.