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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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Day in Engineering History Archive - July 22

Day in Engineering History July 22 Archive - RF CafeJuly 22

Friedrich Wilhelm Bessel Born Today - RF Cafe1784: Friedrich Bessel, of Bessel function fame, was born. 1844: Rev. William Archibald Spooner, inventor of "spoonerisms," was born. 1873: Louis Pasteur received a patent for the manufacture of beer and treatment of yeast. 1918: Lightning killed 504 sheep in Utah's Wasatch National Park. 1926: Babe Ruth caught a baseball at Mitchell Field that had been dropped from an airplane flying at 250 feet. 1930: Aviation pioneer Glenn Curtiss died. 1933: Wiley Post ended his around-the-world flight after traveling 15,596 miles in 7 days, 18 hours and 45 minutes in his single-engine Lockheed Vega 5B. 1942: Gasoline rationing using coupons began for WWII conservation. 1956: Air Force Capt. Frank Everest set a new unofficial world's speed record of Mach 2.87 (1,900 mph) in the Bell X-2 rocket plane. 1976: Arthur Compton, who won a Nobel Prize for his discovery of the Compton Effect, where x-ray wavelengths change when colliding with electron in metal, died. 1979: The first Sony Walkman went on sale. 1989: 11 year old Tony Aliengena became the youngest pilot to fly around the world, taking nearly seven weeks and 21,567 miles. 2000: Astronomers at the University of Arizona announced that they had found a 17th moon orbiting Jupiter. 2003: Uday and Qusay Hussein were killed in a gun battle in Iraq.

| 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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