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!
RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

Amplifier Solutions Corporation (ASC) - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe

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

Cafe Press

Day in Engineering History Archive - October 27

Day in Engineering History October 27 Archive - RF CafeOctober 27

KDKA Assigned Its Call Letters - RF Cafe1675: French mathematician Gilles de Roberval, who invented the Roberval balance weighing scale, died. 1811: Isaac Singer, inventor of the continuous-stitch sewing machine, was born. 1873: Farmer Joseph Glidden applied for a patent on barbed wire. 1904: New York City Subway opened with 9.1 miles of track running from City Hall to 145th Street. 1920: Pittsburgh radio station KDKA received its broadcast license & call letters. 1927: The first newsreel featuring sound was released in New York. 1938: Du Pont announced "nylon" as the name for its new synthetic yarn. 1961: The first Saturn I heavy launch vehicle made an unmanned test launch. 1997: Dow Jones Industrial Average crashed a record 554 points to 7161. 2004: A total lunar eclipse occurred. 2005: IBM's Blue Gene/L system set a new world computing record of 280.6 teraflops.

| 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.

Cafe Press
Werbel Microwave (power dividers, couplers)

KR Electronics (RF Filters) - RF Cafe

Axiom Test Equipment - RF Cafe