•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe™

Sitemap

RF Cafe Software

RF Cascade Worbook
 RF Cascade Workbook 2005 - RF Cafe
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger
BSEE
KB3UON
EIEIO

Carpe Diem!
(Seize the Day!)

5th MOB:
My USAF radar shop

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse riding website

Day in History Archive - April 29
April 29

Happy Birthday Philip H. Smith! -  Please click here to visit RF Cafe.

1879: Electric arc lights were used for the first time, in Cleveland's Public Square (then known as Monumental Park). 1893: American Nobel physicist Harold Urey, who discovered deuterium, was born.  1905: Philip H. Smith (rare photo), inventor of the Smith Chart, was born. 1913: Gideon Sundback patented the zipper. 1921: David Sarnoff became general manager of RCA. 1937: Wallace Carothers, developer of nylon, died. 1945: American soldiers liberated the Dachau concentration camp. 1953: The first 3-D television broadcast was made by KECA-TV in Los Angeles, CA. 1966: William Eccles, who coined the term "diode," died. 1997: Astronaut Jerry Linenger and cosmonaut Vasily Tsibliyev went on the first U.S.-Russian space walk.

| 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.

Try Using SEARCH to Find What You Need.  >10,000 Pages Indexed on RF Cafe !

Copyright 1996 - 2016
Webmaster:  Kirt Blattenberger, BSEE - KB3UON
Family Websites:  Airplanes and Rockets | Equine Kingdom

All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.