Formulas & Data:
- Electronics
- Mathematics
- Physics
- RF & Microwaves

Parts Vendors:
- all hand-selected

- Amateur Radio
- Vintage Articles:
- Electronics World
- Popular Electronics
- QST
- Radio & TV News
- Radio Craft
- Short Wave Craft
- Wireless World

- Events Calendar
RF Cafe Homepage
Copyright 1999-2015   •−•  ••−•    −•−•  •−  ••−•  •   "RF Cafe" in Morse Code  >> Listen to It <<
- EW & Radar Handbook
- Quizzes       - Software
- App Notes
- Calculators
- Advertise on RF Cafe
- About RF Cafe™
- RF Cafe Shirts & Mugs
- RF Cafe Archives
RF Cafe Book Contest
- RF Cafe on Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
- Tech Humor
- Forums Archive
- Job Board
- Donate to RF Cafe
- Kirt's Cogitations
Custom Search
More than 10,000 searchable pages indexed.
Greetings: There is so much good stuff on RF Cafe that there is no way to list or link to all of it here. Please use the Search box or the Site Map to find what you want - there is a good chance I have it here. Thanks!

Day in Engineering History Archive - September 23

| 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.

 

September 23

Robert Bosch Born Today - Please click here to visit RF Cafe.

1846: German astronomer Johann Galle discovered Neptune after only an hour of searching. 1861: Robert Bosch, the German engineer and industrialist who was invented the spark plug and magneto, was born. 1869: Typhoid Mary (Mary Mallon), famous for spreading typhoid fever in NY, was born. 1877: Urbain-Jean-Joseph Le Verrier, who calculated the likely position of Neptune so closely that it took Johan Galle only an hour of search to find, died. 1879: Richard Rhodes invented the audiophone, the first hearing aid. 1913: Roland Garros made the first airplane flight across the Mediterranean Sea. 1930: Flashbulbs were patented by Johannes Ostermeier. 1938: A time capsule, to be opened in 6939, was buried at World's Fair in New York City. 1960: Georges Claude, inventor of the neon light, died. 1962: "The Jetsons" premiered on ABC-TV, being the first program on the network to be carried in color. 1970: IBM announced the System 370 computer. 1981: President Reagan announce plans for Radio Marti to broadcast to the people of Cuba. 2002: Mozilla Firefox browser was first released as Phoenix.

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!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website