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Day in Engineering History Archive - May 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.

May 23

John Bardeen born on this date. - Please click here to visit RF Cafe.

1785: Benjamin Franklin wrote in a letter that he had invented bifocals. 1848: Otto Lilienthal, who accomplished some of the first controlled glider flights, was born. 1908: Nobel physicist John Bardeen, co-inventor of the transistor along with William Shockley and Walter Brattain, was born. 1916: Thomas Edison was issued three patents for his "Phonograph or Talking Machine." 1922: "Daylight Saving Time" was the topic in the first debate ever to be heard on radio in Washington, DC. 1934: Bank robbers Bonnie Parker and Clyde Barrow were shot to death in a police ambush. 1949: The Republic of West Germany was established. 1949: William Hansen, inventor of the klystron tube, died. 1960: Georges Claude, inventor of the neon light, died. 1968: The first decimal coins were distributed in Britain in preparation for replacing the current system of pounds, shillings and pence. 2007: The world's demographic makeup shifted from mostly rural to mostly urban.


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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