RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
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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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Day in Engineering History Archive February 12

February 12

Heinrich Lenz's Birthday - Please click here to visit RF Cafe.1791: American inventor Peter Cooper, who invented the first steam locomotive, named "Tom Thumb," was born. 1804: Heinrich Lenz, Russian physicist who framed Lenz's Law to describe the direction of flow of electric current generated by a wire moving through a magnetic field, was born. 1935: Robert Van de Graaff was issued a patent for his Electrostatic Generator design which could generate direct-current voltages higher than the 700kV. 1965: John Hammond, Jr., developer of radio remote control, died. 1973: The first four metric road signs in the U.S. were erected to post metric distance along Interstate 71 in OH. 1998: A 250-car pile-up occurred in Italy, due to fog, causing 4 deaths and 50 injuries. 2000: Peanuts creator Charles Schulz died in his sleep at his home. 2001: NEAR Shoemaker spacecraft touchdown on 433 Eros, becoming the first spacecraft to land on an asteroid. 2004: Mattel announced the split-up of Barbie and Ken.

| 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.