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.
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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 category).
Cool Pic Archive Pages
is the totally reconstructed "Bombe" tube-based computer, at its original location in Bletchley Park. Bombe decoded
German codes enciphered by the famous Enigma Machines. Prior to decryption, U-boats wreaked havoc in the commercial
shipping channels as well as against naval forces.
Here is the x-ray of a prisoner who swallowed a cell phone prior to being incarcerated. Accomplices swallowed a charger and spare parts. Based on where it got stuck, I'd guess if the plan had worked as envisioned, that homey would be talking some... well, you know.
You just never know what spectacular sight you might happen upon when driving a U-Haul truck from North Carolina to Pennsylvania. Click of the image to see and read the details of my experience.
As if we RF engineers didn't already have a hard enough time shedding the nerd stereotype, the guy at LeapSecond.com had to exacerbate the problem by creating this chess set. All the pieces are made from different types of RF connectors. Thanks a lot!
Art of Failure is a collection of images like this "evil gingerbread man," which is a FIB (focused ion beam)
rendering of melted metal lines on an IC. A pyramid, frog, mummy, and dragon heads are among the other apparitions
on display. If you have something similar from your work, please send it to me and I will publish it on RF Cafe.
You probably saw pictures of Rotating Tower in the news, but here are some details you might have missed. Dubai and Moscow each get one - Moscow first because of no regulatory obstacles. There will be 80 floors, 8 apartments on each of the first 70 floors, villas on the top 10 (villas get garages w/car elevators). Integrated solar cells and wind turbines power the building - excess to be sold to utility company. Modular components built at factory, shipped to site.
These images were e-mailed to me, and they were so unbelievable that I had to find them posted somewhere on the Internet. Supposedly, they are from India. I have seen similar images where families are living in alleys with this kind of snarl of wires overhead and running down the alley walls. Amazing and pathetic.
Since the cost of energy affects engineering, from transportation to powering industry, this U.S. National Gas Temperature Map should be of interest. Maybe the old saying that "Misery Loves Company" inspired the topic. Here is a version for Canada. Venezuelans pay about 20¢/gal, Iranians about 35¢/gal - less than what the government takes in taxes per gallon. U.S. crude oil suppliers: #1 is Canada, #2 is Saudi Arabia, #3 is Mexico.
you see are the legs and feet of a genius who got stuck under a trash bin as he was trying to steal $10 worth of
copper wire. He broke into a landfill to collect his booty, and ended up getting his booty caught. Mr. Cook had
12 hours of breathing garbage fumes to think about how embarrassing it would be when rescuers finally arrived.
While terrorists still stuck in the 5th century This tattoo has to be a real babe magnet. It appears to be scaled with inches, but surely a Euro version with metric graduations is available. There is no mention of a metrology certificate being issued. While you are on the website, note the embedded fingertip magnets - yikes!
Been wondering what to do with all those business cards in your desk drawer? Dr. Jeannine Mosley turned 66,048 of them into an origami Menger Sponge. The structure is 54 inches tall and weighs 150 pounds. It was first publicly displayed in August 2006. For more tricks with business cards, try the Business Card Origami website.