RF Cafe Homepage
ConductRF Phased Matched RF Cables - RF Cafe

Crane Aerospace Electronics Microwave Solutions

Windfreak Technologies Frequency Synthesizers - 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

Copper Mountain Technologies (VNA) - RF Cafe

Day in Engineering History Archive - May 1

Day in Engineering History May 1 Archive - RF CafeMay 1

Ford Adopted 40-Hour Work Week. Click here to return to the RF Cafe homepage.1825: Johann Balmer, of Balmer's formula for computing wavelengths [λ=hm²/(m²-n²)], was born. 1921: The first successful marine radio navigation beacons began regular operation in the U.S. 1925: Astronaut M. Scott Carpenter, the second U.S. citizen to orbit the earth, was born. 1926: Henry Ford announced an 8 hour, 5 day work week. 1931: The Empire State Building was dedicated remotely by President Hoover from Washington, D.C. 1934: Nelly Diener became Europe's first air stewardess. 1947: Howard Hughes tested the first airborne radar aboard a TWA Constellation. 1958: James Van Allen reported that two radiation belts encircled Earth. 1960: The Soviet Union shot down an American U-2 reconnaissance plane near Sverdlovsk and captured its pilot, Francis Gary Powers. 1964: The first BASIC program, invented by John Kemeny and Thomas Kurtz at Dartmouth University, was run on a computer at about 4:00 a.m. 1999: The ''Liberty Bell 7,'' the Mercury space capsule flown by Gus Grissom, was found in the Atlantic 300 miles southeast of Cape Canaveral, 38 years after it sank.

| 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.

Copper Mountain Technologies (VNA) - RF Cafe
Amplifier Solutions Corporation (ASC) - RF Cafe

Innovative Power Products (IPP) Directional Couplers

RF Cascade Workbook 2018 by RF Cafe