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Copyright: 1996 - 2024
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 World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while typing up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
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Cool Pic Archive - 2
Cool Pic Archive Pages
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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
This 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.
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?
Click 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.
Iraqi citizens, help is on the way!
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)
dolphin, K-Dog, shows Sgt. Andrew Garrett what he's learned as he trains near the
USS Gunston Hall, in the Persian Gulf.
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.
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.
recorded wind on earth's surface.
kind of house would a guy like Dilbert want to live in? Why, the Dilbert Ultimate
House (DUH), of course.
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
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