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.
My Hobby Website:
Cool Pic Archive #5
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
of the prototype of "The Clock of the Long Now" - a 10,000 year clock. If you appreciate mechanical wonders,
then you MUST visit this website.
Fluid (non-Newtonian liquid) will revolutionize body armor. Bullets and even ice picks are stopped by it.
Amazing! U. of Delaware & Aberdeen Proving Grounds research.
Carol's masterpiece version of Charles Babbage's difference engine - made of Legos!
microfluidics reactor microchip is built from silicon using tunnels, valves, pumps, and porous membranes -
striking Balad Air Base in Iraq.
are the inner workings of a Metcal SP-200 soldering station - in case you have ever wondered. I bought the
entire setup on eBay for $61 (over $250 new).
actuators change shape when electrically excited. A SQUIGGLE motor consists of several piezoelectric ceramic
actuators attached to a threaded nut, with a mating threaded screw inside.
of circuit boards from hazardous computer waste stretch into the distance near an e-waste scrap yard.
GPS/Wireless ballistic vehicle tagging system for tracking offenders that might otherwise end in a high-speed
have got watch this video: The 85 way was completed in 9 minutes and 46 seconds from the time Chris left the
plane until the last legal grip was taken on Annie. We held it for 17 seconds.
gas price map of the U.S.
this photo of a toppled transmission tower in Basra, Iraq, is not really "cool" since it represents terrorists
destroying the world's accomplishments, but it is interesting.
reconnection on the Sun (Earth shown for scale). These are the precursors to the explosive release of energy
in a solar flare.
of Aibo (Artificial Intelligence Robot) Robotic Dog.
now we have all heard stories of yellowcake uranium. Here is what it actually looks like.
system built entirely from Legos.