RF Cafe Software
About RF Cafe
1996 - 2022
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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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These images have been chosen for their uniqueness. Subject matter ranges from historic events, to really cool phenomena in science and engineering, to relevant place, to ingenious contraptions, to interesting products (which now has its own dedicated Featured Product category).
Cool Pic Archive Pages
is not cool at all. Kanga US, located in Findlay, OH, was hit by massive floods and had its basement inventory -
mostly QRP kits manufactured by Kanga Products in England - wiped out. He seems to be taking it in stride, though
(click on the sailboat link).
Photo-multipliers line the steel chamber of the Borexino detector in this image taken during the detector's construction phase. Its mission is to detect low-energy neutrinos streaming from the sun's core in one of the deepest laboratories in the world, the Gran Sasso Laboratory of the Istituto Nazionale di Fisica Nucleare, near the town of L'Aquila, Italy.
Projected U.S. county population and growth trends map for 1970 to 2030. Blue is decrease, orange is increase.
I took this photo on June 30, 2007 (last night). It is unique in that this moon is at nearly its lowest possible elevation due to the precession of the inclined lunar orbit wrt the Earth (18.61 year period). It will not be lower until the 2020s. A "super high moon" will occur on December 23-24, 2007 (57° higher).
Bryan Berg is a Guinness World Record holder for card structures. In 2004, Berg earned his Master of Design Studies from the Harvard Graduate School of Design - no surprise there.
as seen from Saturn - photographed by Cassini spacecraft.
Rabbit ears are back in vogue for HDTV. "Eighty-year-old technology is being redesigned and rejiggered to deliver the best picture quality."
Pedal radios of the Outback. In the 1920s, Australian farmer boy-turned-engineer Alfred Traeger and the Reverend John Flynn teamed to introduce radio to the far reaches of the Outback. Their success was attributed largely to Traeher's ingenious foot-powered generator that was part of the package.
How do you spell "tomorrow" in Silicon Valley? To make things worse, this was a political stump promoting higher education and increasing the number of H1-B visas.
Bacteria crawl in the circular groove under the motor and brush past the tabs that support the motor's star-shaped rotor. Molecular bonds between the microbes and a coating on the rotor tug the device around its axis.
misspellings in the world of news. Here, the Space Shuttle Endeavour's name is spelled "Endeavor" on a huge banner
at Kennedy Space Center. Now, "endeavor" is a proper spelling for the word, but the shuttle was named after the
HMB Endeavour, the ship commanded by
18th century explorer James Cook; the name also honored Endeavour, the Command Module of
Slurpr: The Mother of All WiFi Routers. This ain't no joke. 802.11z anyone?
Now THIS is a Swiss Army Knife - 110 functions with 85 implements. If you have a Swiss bank account full of money, you can afford to have one. Wenger Giant Swiss Army Knife™ V1.0, Price: $1,200.00
is your pocket knife on steroids. No kidding, Wenger sells this Swiss Army Knife with 85 implements and 110 functions
for a mere $1,200 - a small price to pay for your survival, I would think.
I'll bet you have not seen this last page of the Linear Technology AN75-32 application note. I ran across while researching a part. Can this be considered an App Note Easter Egg?
My camera was there. Revealed: The secret to how Toyota can report such good gas mileage for the Prius!