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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 - March 28

March 28

Day in Engineering History March 28 Archive - RF Cafe1747: The first in a series of letters from Benjamin Franklin to Peter Collinson was sent regarding his experiments with electricity. 1903: Jean-Maurice-Émile Baudot, who created a telegraphic code that eventually replaced Morse Code, and after whom the term "baud" is named, died. 1905: Cornelius D Ehret received the first patent for a system of frequency modulation (FM). 1905: Ralph Scott received a patent for an electric arc lamp. 1923: James Dewar, inventor of the flask that bears his name, died. 1935: Robert Goddard first used gyroscopes to control a A−5 rocket. 1962: U.S. Air Force announced research into the use of lasers to intercept missiles and satellites. 1979: A nuclear accident occurred inside Unit Two reactor at Three Mile Island plant near Middletown, PA.

| 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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