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
Sports: When does a model rocket become a weapon?
A view of the blast door at the entrance of NORAD's Cheyenne Mountain, in Colorado Springs, CO.
The Army’s Tactical High Energy Laser Advanced Concept Technology Demonstrator (THEL/ACTD) has successfully demonstrated its ability to detect, track, engage and destroy a Katyusha rocket armed with a live warhead. The rocket in flight was successfully intercepted and destroyed in field testing at the Army’s High Energy Laser Systems Test Facility, White Sands Missile Range, N.M.
This picture shows the world's first transistor on the workbench of John Bardeen and Walter Brattain at Bell Laboratories.
first monolithic integrated circuit, about the size of a finger tip, was documented and developed at Texas Instruments
by Jack Kilby in 1958. The IC was a chip of a single Ge crystal containing one transistor, one capacitor, and one
0.8 seconds to live at Mountain Home AFB Thunderbirds air show, September 2003. Links to videos from the cockpit and on the ground are on the page. Amazing!
Congrats to the Chinese space program for their successful manned orbiting mission. Maybe some day they'll follow us here, too (Apollo 11, July, 1969).
USS Enterprise nuclear-powered carrier with crew arranged to mark its 40th anniversary - cool!
14, 2003 North American blackout - viewed from space
The Wilkinson Microwave Anisotropy Probe (WMAP) team has made the first detailed full-sky map of the oldest light in the universe. It is a "baby picture" of the universe. Colors indicate "warmer" (red) and "cooler" (blue) spots. The oval shape is a projection to display the whole sky; similar to the way the globe of the earth can be projected as an oval. This image has 45 times more resolution than the previous map (COBE).
Well, this isn't really cool, but it illustrates how costly and tragic STUPID mistakes can be.
Before and after shot of "The Old Man of the Mountain" in New Hampshire. Click here for the story.
discharges of lightning that flash from the tops of thunderclouds for distances of 40 miles or more, have been observed
for the first time on Earth.
Robo-receptionist clocks on - Android aide brings artificial intelligence to front desk at King's College in London.
Scaled Composite's contender for the X-Prize race to space contest - the White Knight carries SpaceShipOne (the actual space vehicle) over windmills west of Mojave, with Beech Starship flying chase.
Lightning striking the Sears Tower in Chicago, 8/1/2003