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Day in Engineering History Archive - July 28

| 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.

July 28

Trans-Alaska Pipeline Loaded 1st Oil onto Tanker - Please click here to visit RF Cafe.

1865: The American Dental Association proposed its first code of ethics. 1851: A total solar eclipse was first captured on a daguerreotype photograph at the Royal Observatory in Königsberg, Prussia. 1858: Fingerprints were used as a means of identification for the first time. 1866: The metric system was authorized for the standardization of weights and measures throughout the United States this day. 1900: Louis Lassing of New Haven, CT created the first hamburger. 1907: Earl Tupper, inventor of the plastic Tupperware, was born. 1934: Nelly Diener became Europe’s first air stewardess. 1943: President Roosevelt announced the end of coffee rationing. 1945: A U.S. Army B-25 bomber got lost in the fog and crashed into Empire State Building. 1977: The 799-mile trans-Alaska pipeline began full operation as the first oil from Prudhoe Bay arrived at Valdez. 1986: NASA released a transcript from doomed Challenger space shuttle, where pilot Michael Smith could be heard saying, "Uh-oh!" as spacecraft disintegrated.


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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.
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