RF Cafe Software
About RF Cafe
1996 - 2022
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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This collection of video and a few audio files represents files that have been featured on the RF Cafe homepage. Every week or so a new file is added that should be of interest to RF Cafe visitors.
Please send me an e-mail if you have a good subject. Note: "Videos for Engineers" formerly went by the name "Cool Videos."
Nikola Tesla - The Forgotten Wizard. This is a unique,
10-minute treatise on the political and personal battles Nikola Tesla fought in his lifetime. It brings
out some some of his ideas that I had never heard of.
Fire from salt water? Erie, PA, radio technician
Kanzius serendipitously discovered that his radio frequency generator could release the oxygen and
hydrogen from saltwater and create an incredibly intense flame. His finding came as a result of experiments
he was performing for a revolutionary cancer treatment that nonintrusively zaps cancer cell with RF
held an Online Engineering Video Scholarship Competition for Undergraduates, with $6,000 in scholarship
awards. Here is the #1 winning video from two dudes at Louisiana Tech University - it is pretty good.
The Falkirk Wheel (U.K.) is a one-of-a-kind canal lock
implementation that uses a balanced, rotating arm to simultaneously raise and lower vessels travelling
in opposite directions in the canal. 15,000 bolts were matched with 45,000 bolt holes, and each bolt
was hand tightened due to stress factors.
EE Time's 'Teardown TV' performs a
teardown of an
This is a resurrection of the engineering school stalwart of the 1970s and 1980s, the HP35.
The GFS Projects
Limited Unmanned Aerial vehicle (UAV) GFS13A is able to take off and land vertically; it can hover at
heights up to eighty feet. The GFS UAV uses the Coanda principle to create lift, it has very little
downwash and is aerodynamically stable.
It's all the rage lately - wireless transfer
of energy. Like most new technology concepts, the idea is great, but practical implementation is the
challenge. Magazine articles have heralded it as The Next Big Thing for powering everything in your
house and office - finally eliminating cords and batteries the same way cordless phones and wireless
modems eliminated cables. In this case, going from the lab to the marketplace will take redefining physics,
or glow-in-the-dark houses spewing kW of power to get a AA battery's worth of power to an electric razor.
Purdue Society of Professional
Engineers team took 1st place in the 2008 national Rube Goldberg Contest. The
task for this year? - A Hamburger Making Machine. The contraptions needed to assemble a hamburger
consisting of no less than one precooked meat patty, two vegetables and two condiments, sandwiched between
two bun halves. Sponsors included some big names like BAE, Daimler-Chrysler, GE, Lockheed Martin, Omega
Engineering, and Rockwell Collins.
This 1939 docudrama,
"Radio Hams, " is a short film produced by Pete Smith for Metro-Goldwyn-Mayer. Jimmy Mulligan uses Ma
Mulligan's egg beater to wind coils for his radio set. Listen in on the dramas as they unfold. (Thanks to Cornel for this)
A synthetic seed crystal is placed in a tank filled
with a metric ton of supersaturated potassium dihydrogen phosphate (KDP). As it rotates on a turntable
for two months, the square crystal grows to be as large as 800 pounds. It is the used in the National
Ignition Facility to process laser beams on their way to the target chamber. Notice the part about measuring
the crystal where the guy pulls out a Wal-Mart quality tape rule to measure it.