Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software, T-Shirts, Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums Thank you for visiting RF Cafe!

Day in Engineering History Archive - August 11

August 11

Hedy Lamarr awarded spread spectrum patent - Please click here to visit RF Cafe.The Dog Days of Summer end. 1896: The first electric light bulb socket featuring an on-and-off pull chain was patented by Harvey Hubbell. 1909: The liner Arapahoe was the first ship to use the radio distress call, SOS (save our ship, Morse Code ···---···). 1919: Industrialist Andrew Carnegie died. 1921: Tom Kilburn, who was the first to succeed in storing and then retrieving a bit of data via software, was born. 1934: A load of America's most dangerous prisoners became the first inmates on Alcatraz Island. 1942: Actress Hedy Markey (Lamarr) received a patent for a secret communication system. 1951: WCBS-TV in New York City televised the first baseball doubleheader (in color) between the Brooklyn Dodgers and the Boston Braves. 1962: The Soviet Union launched cosmonaut Andrian Nikolayev on a 94-hour flight. 1977: Sir Frederic Williams, co-inventor of the CRT (the "Williams tube"), died. 1984: President Ronald Reagan joked during a voice test for a radio address that he had "signed legislation that will outlaw Russia forever. We begin bombing in five minutes." 1992: The Mall of America opened in Minneapolis as the largest shopping mall in the United States. 1997: President Clinton made the first the use of the line-item veto approved by Congress. 1999: The last total solar eclipse of the millennium occurred.

| 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. Many 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.

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
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

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !