Search RFCafe.com                           
      More Than 18,000 Unique Pages
Please support me by ADVERTISING!
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™ Please Support My Advertisers!
   Formulas & Data
Electronics | RF
Mathematics
Mechanics | Physics
     AI-Generated
     Technical Data
Pioneers | Society
Companies | Parts
Principles | Groups


 About | Sitemap
Homepage Archive
        Resources
Articles, Forums Calculators, Radar
Magazines, Museum
Radio Service Data
Software, Videos
     Entertainment
Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes
   Parts & Services
1000s of Listings
 Vintage Magazines
Electronics World
Popular Electronics
Radio & TV News
QST | Pop Science
Popular Mechanics
Radio-Craft
Radio-Electronics
Short Wave Craft
Electronics | OFA
Saturday Eve Post

Software: RF Cascade Workbook
RF Stencils for Visio | RF Symbols for Visio
RF Symbols for Office | Cafe Press
Espresso Engineering Workbook

Aegis Power  |  Alliance Test
Centric RF  |  Empower RF
ISOTEC  |  Reactel  |  RFCT
San Fran Circuits

Crane Aerospace Electronics Microwave Solutions: Space Qualified Passive Products

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

Amplifier Solutions Corporation (ASC) - 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

Holzsworth

Day in Engineering History Archive - February 5

Day in Engineering History February 5 ArchiveBoy Scouts of America Founded  - Please click here to visit RF Cafe.February 5

1840: Scottish inventor of the pneumatic tire, John Dunlop, was born. 1840: Prolific inventor Sir Hiram Stevens Maxim, who developed the Maxim (machine) gun and also was the father of ARRL founder Hiram Percy Maxim, was born. 1850: The first adding machine with keys was patented by Du Bois Parmelee. 1897: The Indiana House of Representatives unanimously passed a measure redefining the area of a circle and the value of π -- the "Indiana Pi Bill" died in the state Senate (because it was obvious in error). 1901: Edwin Prescott received a patent for his 20 foot diameter loop-the-loop centrifugal railway (roller coaster) at Coney Island. 1915: Robert Hofstadter, Nobel Prize for Physics recipient for measuring the sizes of the neutron and proton in the nuclei of atoms, was born. 1971: Alan Shepard and Edward Mitchell walked on the moon for four hours during the third manned moon expedition, Apollo 14. 1974: U.S. space probe Mariner 10 returned the first close-up photos of Venus' cloud structure. 1978: One of the worst blizzards in recorded history hit the U.S. northeast.

| 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.

| 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.

Holzsworth
ConductRF Phased Matched RF Cables - RF Cafe

Innovative Power Products (IPP) RF Combiners / Dividers

Innovative Power Products Passive RF Products - RF Cafe