Homepage - RF Cafe
Webmaster: Kirt Blattenberger | KB3UON | Sitemap | ©1996-2014     Visit RF Cafe on
      Menu below is just a small sample of what is here!          Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
Custom Search
More than 10,000 searchable pages indexed.
•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Day in Engineering History Archive - May 21

| 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.

May 21

Charles Lindbergh Lands in Paris.  Please click here to visit RF Cafe.

1792: Gustave-Gaspard Coriolis, who discovered the circulation effect that bears his name, was born. 1878: Aviation pioneer Glenn Curtiss was born. 1916: Daylight Saving Time was introduced in Britain as a war-time measure to save fuel. 1927: Charles Lindbergh completed his 33-1/2 hour solo, non-stop flight from NY to Paris. 1932: Amelia Earhart became the first woman to fly solo across the Atlantic Ocean, from Newfoundland to Ireland. 1956: The U.S. exploded the first airborne hydrogen bomb in the Pacific Ocean over Bikini Atoll. 1927: Dudley Allen Buck, inventor of the cryotron switch and ferroelectric RAM, died. 1959: Radar pioneer and head of the National Security Agency Scientific Advisory Board panel on Electronics Louis Nicot Ridenour, died. 1965: English aircraft designer Sir Geoffrey De Havilland died. 1980: "Star Wars V: The Empire Strikes Back," was released.


A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
Your RF Cafe Progenitor & Webmaster
Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an
                                 engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem! (Seize the Day!)

5CCG (5th MOB): My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website