1996 - 2016
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 ...
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:
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
60-centimeter natural color image of the "boneyard" at the Davis-Monthan Air Force Base in Tucson, Arizona,
was collected by QuickBird on August 11, 2002. The boneyard serves as a holding place for out-of-rotation
airplanes until their fate is decided; the dry, clear climate of Tucson provides an ideal environment for the
storage of aircraft, as they can sit indefinitely without rusting. The hard, desert soil also makes for easy
towing of the planes without the need for roads. From the DigitalGlobe website.
Click to view larger image of an intenna instalation on the Empire State Building - thanks Cornell!
An RF engineer's dream chess set. Thanks to Lance L. for this one.
Micromachined chain - built with lasers.
John Travolta's home in Ocala, FL, with private Boeing 707 and Gulfstream II, alongside his 7,500 foot runway. I wonder what his Hollywierd buds think of his destroying all that ozone with his aeroplanes?
to view bigger image. This "Cloaked" B-2 photo was taken by Bobbi Garcia, and won first place in the "Aviation
Week & Space Technology" 2002 photo contest for military aircraft.
Hang on Iraqi citizens, help is on the way!
A blob of ferrofluid in a petri dish, with a 1 inch dia. x 1/4 inch thick NdFeB disc magnet underneath. This makes iron filings on a piece of paper look lame.
Turn any one of the spheres in this universal bearing and all the others will rotate freely (the image in the linked document is skewed so the spheres look like ovals)
Navy dolphin, K-Dog, shows Sgt. Andrew Garrett what he's learned as he trains near the USS Gunston Hall, in
the Persian Gulf.
Click here to view ENIAC - the world's first electronic digital computer was developed by Army Ordnance to compute World War II ballistic firing tables, circa 1946.
This fabulous poster shows a detailed layout of the inner working of Curt Herzstark's amazing machine - the Curta Calculator. The January 2004 issue of Scientific American has a great article on it.
here for full-size image and an explanation.
Highest recorded wind on earth's surface.
What kind of house would a guy like Dilbert want to live in? Why, the Dilbert Ultimate House (DUH), of course.
"Waterfall of Cables" FlashMob 1: Students at UC San Francisco have networked 669 PCs to achieve a Linpack speed of 180 Gflops - earning it a spot in the list of the world's 500 fastest computers.