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 - June 15

| 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.

June 15

Radio Bloemendaal Becomes The Netherland's 1st Radio Station - Please click here to visit RF Cafe.

1752: Ben Franklin's kite-flying experiment proved lightning and electricity were related. 1785: Balloonists de Rozier and Romain died in world's first fatal aviation accident. 1844: Charles Goodyear was granted a patent for the process vulcanizing process that strengthens rubber. 1877: Henry O. Flipper became the first African American to graduate from the U.S. Military Academy at West Point. 1919: Capt. John Alcock and Lt. Arthur W. Brown won $50,000 for successfully completing the first, non-stop trans-Atlantic plane flight. 1919: Helicopter and guitar pioneer Charles Kaman was born. 1924: Ford Motor Company manufactured its 10 millionth Model-T automobile. 1924: Radio Bloemendaal (Netherlands) began broadcasting. 1985: National Justice for Janitors Day was first celebrated.1992: The first Berlin Air Show in 60 years was held. 1995: John Atanasoff, who was belatedly credited as the builder of the first electronic digital computer (the Atanasoff-Berry Computer, ABC), died.


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