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Day in Engineering History Archive - May 9

| 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.

May 9

1st Time a Laser Beam Was Bounced off the Moon. Click here to return to the RF Cafe homepage.

1850: Edward Weston, founder of the Weston Electrical Instrument Company, was born. 1865: A patent was issued to Richard Gatling for his Gatling gun. 1882: William Ford was issued a patent for his now-familiar stethoscope. 1893: Thomas Edison exhibited the first public motion picture (kinetoscope) to an audience in Brooklyn, NY. 1914: Paul-Louis-Toussaint Héroult, inventor of the electric arc furnace, died. 1926: Americans Richard Byrd and Floyd Bennett became the first men to fly an airplane over the North Pole. 1927: Canberra replaced Melbourne as the capital of Australia. 1931: Nobel physicist Albert Michelson, who first accurately measured the speed of light, died. 1961: Then FCC chairman Newton N. Minow condemned television programming as a "vast wasteland" in a speech to the National Association of Broadcasters.  1962: A laser beam was successfully bounced off the Moon for the first time.


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

Smith Chart™ for Excel
Smith Chart™ for Visio
RF & EE Symbols Word
RF Stencils for Visio

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