RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
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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 - October 20

October20

 

1818: The U.S. and Great Britain established the boundary between the U.S. and Canada to be the 49th parallel. 1891: English Nobel Prize winner James Chadwick, discoverer of the neutron, was born. 1944: General Douglas MacArthur stepped ashore at Leyte in the Philippines, 2 1/2 years after he had said, ''I shall return.'' 1956: American aircraft designer Lawrence Bell, founder of Bell Aircraft (maker of the Bell X-1 the first broke the sound barrier), died. 1960: The length of the meter was redefined to be equal to 1,650,763.73 wavelengths in vacuum of the radiation corresponding to the transition between the 2p10 and 5d5 quantum levels of the krypton-86 atom. 1960: The first fully mechanized post office opened in Providence, RI. 1972: American astronomer Harlow Shapley, who discovered the sun's position in the Milky Way galaxy, died. 1983: IBM-PC DOS Version 2.1 was released. 1984: English physicist Paul Dirac, who shared a Nobel Prize with Erwin Schrödinger, and after whom the Dirac delta function is named, died.

| 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.