RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel
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 - January 12

January 12

Emergency 911 Phone Number Adopted - RF Cafe1716: Antonio de Ulloa, who discovered the element Platinum (Pt), was born. 1866: The Royal Aeronautical Society was founded in London. 1896: Dr. Henry Smith took the first X-ray photograph - a hand with a bullet in it (he shot a corpse to get the pic). 1906: The DOW closed above 100 for the first time. 1908: A wireless message was sent long-distance for the first time from the Eiffel Tower in Paris. 1951: Radio talk show host Rush Limbaugh was born. 1966: The Batman television series debuted on ABC. 1968: Bell Systems adopted "9-1-1" as the emergency telephone number. 1970: The Boeing 747 made its maiden voyage. 1971: "All in the Family" debuted on CBS. 1997: HAL 9000 (Heuristically programmed ALgorithmic computer) of "2001: A Space Odyssey" fame, became operational. 2001: Hewlett-Packard co-founder William (Bill) Hewlett died in Palo Alto, CA, at age 87.

| 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.