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MECA Electronics

Day in Engineering History Archive - September 15

Day in Engineering History September 15 Archive - RF CafeSeptember 15

RCA Introduces the 12AX7 Tube - Please click here to visit RF Cafe.

1928: Alexander Fleming discovered penicillin in the mold Penicillium notatum. 1940: The German Luftwaffe suffered the loss of 176 planes in the Battle of Britain. 1941: AMP incorporated as Aircraft Marine Products (how many people know that?). 1947: RCA released the 12AX7 vacuum tube to the market (datasheet). 1964: The London's Sun newspaper debuted. 1965: "Lost in Space" premiered. 1978: German aircraft engineer Willy Messerschmitt died. 1982: The first issue of "USA Today" published. 2001: President George W. Bush identified Osama bin Laden as the prime suspect in the 9-11 terrorist attacks.

| 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. Images used in the logos are often from open source websites like Wikipedia, and are specifically credited with a hyperlink back to the source where possible. Fair Use laws permit small samples of copyrighted content.

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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 ...

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