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Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 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 ...

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Cool Pic Archive #5



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

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |







Part 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.Part 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.


Shear-Thickening Fluid (non-Newtonian liquid) will revolutionize body armor. Bullets and even ice picks are stopped by it. Amazing! U. of Deleware & Aberdeen Proving Grounds research.Shear-Thickening 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.


  Andrew Carol's masterpiece version of Charles Babbage's difference engine - made of Legos!Andrew Carol's masterpiece version of Charles Babbage's difference engine - made of Legos!


This microfluidics reactor microchip is built from silicon using tunnels, valves, pumps, and porous membranes - amazing! This microfluidics reactor microchip is built from silicon using tunnels, valves, pumps, and porous membranes - amazing!
Lightning striking Balad Air Base in IraqLightning striking Balad Air Base in Iraq.


Here 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).Here 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).


Piezo 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.Piezo 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.


Piles of circuit boards from hazardous computer waste stretch into the distance near an e-waste scrap yard.Piles of circuit boards from hazardous computer waste stretch into the distance near an e-waste scrap yard.
StarChase GPS/Wireless ballistic vehicle tagging system for tracking offenders that might otherwise end in a high-speed pursuit.StarChase GPS/Wireless ballistic vehicle tagging system for tracking offenders that might otherwise end in a high-speed pursuit.


You 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.You 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.


County-by-county gas price map of the U.S.County-by-county gas price map of the U.S.


Well, 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.Well, 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.
Magnetic reconnection on the Sun (Earth shown for scale). These are the precursors to the explosive release of energy in a solar flare.Magnetic reconnection on the Sun (Earth shown for scale). These are the precursors to the explosive release of energy in a solar flare.


X-Ray of Aibo (Artificial Intelligence Robot) Robotic DogX-Ray of Aibo (Artificial Intelligence Robot) Robotic Dog.


By now we have all heard stories of yellowcake uranium. Here is what it actually looks like.By now we have all heard stories of yellowcake uranium. Here is what it actually looks like.


PC system built entirely from LegosPC system built entirely from Legos.