Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor RF Cafe Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave RF Cafe Software Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!
Werbel Microwave (power dividers, couplers)

Noisecom

LadyBug RF Power Sensors

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

RF Cascade Workbook 2018 - RF Cafe

Day in Engineering History Archive - August 9

Day in Engineering History August 9 Archive - RF CafeHappy Birthday Amedeo Avogadro! - Please click here to visit RF Cafe.August 9

Today isSmokey the Bear Day (1944). 1678: American Indians sold the Bronx to Jonas Bronck for 400 beads. 1776: Count Amedeo Avogadro, who discovered that at the same T and P all volumes of a perfect gas contained the same number of particles, and defined 6.022 x 1023 units per mole of a substance, was born. 1815: The first natural gas well in the U.S. was discovered. 1819: William Morton, the first dentist to use ether (letheon) during a tooth extraction, was born. 1831: The first steam locomotive train began its inaugural run between Albany and Schenectady, in NY. 1859: The passenger elevator was patented. 1892: Thomas Edison received a patent for the two-way telegraph. 1898: Rudolf Diesel was granted patent #608,845 for an "internal combustion engine" the diesel engine. 1910: The first completely self-contained electric washing machine was patented. 1945: During WW II, an atomic bomb (Fat Man) was dropped on Nagasaki, Japan, effectively ending the war begun with the 1941 surprise raid at Pearl Harbor. 1956: The first statewide, state-supported educational television network went on the air in AL. 1976: The U.S.S.R. launched Luna 24, last lunar flight to date from Earth. 1985: Arthur Walker, a retired Navy officer, was found guilty of seven counts of spying for the Soviet Union. 1998: Chinese engineers dynamited levees along the Yangtze River to ease the worst floods in 44 years. 2006: American physicist James Van Allen, discoverer of the Van Allen radiation belts, died.

| 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.

TotalTemp Technologies (Thermal Platforms) - RF Cafe

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 tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

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

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

My Hobby Website: AirplanesAndRockets.com

My Daughter's Website: EquineKingdom

PCB Directory (Manufacturers)

Innovative Power Products Passive RF Products - RF Cafe