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
Battery Energy Storage System (BESS) provides 27
megawatts of power for 15 minutes - long enough for the Anchorage, AK co-op to start up local generation.
Nano Guitar - "...Yeah, but can you tune it?"
NASA engineers used a kind of "artificial evolution" software to find this antenna design. The result may look odd, but it works very well.
I think DOW's "Human Element" theme is extremely clever.
PillCam™ ESO travels through the esophagus by normal peristaltic waves, flashing 14 times per second, each
time capturing images of the inner lining of the esophagus, and transmitting them wirelessly to a receiver.Metamaterial
that has a negative index of refraction.
Full-Scale High-Speed Schlieren Imaging of Explosions and Gunshots (aka, photographing shock waves)
June 6, 2006, the temporary dam walls used during construction of the Three Gorges Dam on the Yangtze River were blown up to release the water. Watch the cool video.
Real-time traffic in the entire U.S.
ESD - the photographer was only 20 meters away!
Simulated Pickett N909-ES Slide Rule - online & interactive - excellent!
The entry for evolution on Wikipedia, the Internet encyclopedia that anyone can edit, was altered 2,081 times by 68 editors between December 2001 and last October. IBM's Watson Research Center produced this image, which tracks the transformation. Each vertical line is a new version; each color is a different editor.
Here is North Korea at night. It is virtually dark compared to its nearest neighbors of South Korea and Japan. Now, if those light water nuclear reactors we gave them were being used to generate electricity instead of creating weapons-grade fuel, maybe the poor people of North Korea would have lights (and heat, and radios, and televisions, and ovens, and DVD players, and computers, and..
a new stereo? Krell Evolution One Price: A mere $50,000.
Adrian White, Analytic Social Psychologist, at the University of Leicester has produced the world's first "World Happiness Map"
Grace Hopper's computer "bug" taped in the log book.