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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There are 1,000s of Pages Indexed on RF Cafe !
These items are an archive of past Topical Smorgasbord items that have appeared on the RF Cafe homepage. In keeping with the "cafe" genre, these tidbits of information are truly a smorgasbord of topics. They all pertain to topics that are related to the general engineering and science theme of RF Cafe. Note: There is also a huge collection of my 'Factoids' (aka 'Kirt's Cogitations') that might interest you as well.
Cingular Wireless and Virgin Mobile offer a "rescue call" service:
Escape-A-Date. It sounds like an old SNL
routine, but according to Cingular:
"This new service allows you to schedule a 'rescue' phone call at a pre-set time. That way, you'll be called at the time you specify. The service tells you exactly what to say to set the tone for a speedy escape. There are eight randomly generated humorous scripts.
With 'Escape-A-Date,' you'll never be at a loss if you need a timely rescue."
IC Manufacturer Top
Where U.S. Students Who
Religion Profile of U.S. EEs
|46 Years Old|
|Works 53 Hours Per Week|
|10 Years with Current Company|
|21 Years Engineering Experience|
Earns $93,055 Total
Cost of Increasingly Heavier
Adult male weight increase from
Weight FAA assumed for average male from
|Gallons of fuel consumed by domestic air travel in 2000||14.8B gal|
|Additional fuel need to carry heavier males||350M gal|
|Additional CO2 generated from additional fuel||3.8M lbs|
|Cost of additional fuel in 2000||$275M|
High-Tech Jobs in the U.S.
Here is Why There is no Urgency
to Control the Cost of Oil
|10 Wealthiest U.S. Senators ($M)|
|John Kerry, D-MA||1,000|
|Sen. Jon Corzine, D-NJ||300|
|Herb Kohl, D-WI||270|
|Jay Rockefeller, D-WV||200|
|Lincoln Chafee, R-RI||51.6|
|Dianne Feinstein, D-CA||31.9|
|Bill Frist, R-TN||15.1|
|Hillary Clinton, D-NY||12.8|
|John McCain, R-AZ||11.4|
|Elizabeth Dole, R-NC||10.4|
|President George Bush||13.5|
|V.P. Richard Cheney||67.6|
Software Piracy Rates
EE Times' 2005
Zoom all the way in for maximum detail!
The McMath-Pierce Solar Telescope, one of 23 separate telescopes sitting 6,875 above sea level feet atop Arizona's Kitt Peak, is lined with 4.7 miles of water-cooling pipes to keep the optics from vaporizing due to the focused light from the sun.
If you can identify this connector, please click here to send me an e-mail. Hover your mouse over the image for a description and click on it for a larger view.
It appears that the original vendor was Micro-Mode, who made the connectors as a special order item for a test cable vendor. Thanks for your participation!Guesses So Far:
Although not intended to be for fun, you folks have sent in humorous suggestions along with the serious. Some are listed below - thank you.
* SMA to 1.85mm push fit adaptor. Not sure I'd
Printed RFID Antenna Units
|The earth's magnetic field slightly alters the trajectory of the electron beam in a CRT. The field is strongest at the poles, weakest at the equator, and varies in the direction of polarity everywhere. A CRT adjusted to display properly in Oregon will not look the same in Peru or Italy.|
% of U.S. EE Degrees Awarded to Foreign Students
Top 10 Issues that
|8||Financial health of company|
|5||Health of economy|
|2||Keeping current with new technologies|
|1||Looming project deadlines|
Job Hunting Stats - Mid 2005
|Actively seeking new position||11%|
|Not actively seeking, but would follow up if opportunity arose||32%|
|Not actively seeking, but would follow up only if personally approached||31%|
|No plans to change jobs for any reason||26%|
2004 Patent Applications
|Republic of Korea||4%|
2005 Electrical Engineer's Salary
|Stock / Stock Options||$2,236|
Predicted Household Broadband Penetration by End of 2005
Engineers' Vacation Time in 2004
|4 weeks or more||39%||20%|
|4 weeks or more||94%||79%|
|Gas Prices US$/US Gal as of March 2005|
Digging a hole to China is evidently an American kids' thing. From most of the U.S., a hole through the center of the earth leads to the Indian Ocean. An unscientific study by Scientific American magazine shows kids from most other countries never think about what's directly below then. British adults definitely were thinking about it, though, when they named the Antipodes Islands, near New Zealand, because that point is directly across from Greenwich, England. (antipode = a direct or diametrical opposite). What did middle school boys say they would see if they looked straight down through the earth? "Up girls' skirts."
The curvature employed by Alexandre-Gustave Eiffel of the 986-foot high Eiffel Tower has long intrigued engineers. On a mission to derive an equation for the profile, Patrick Weidman of the University of Colorado discovered an equation in one of Eiffel's notebooks that is an exponential of the natural logarithm - one found frequently in nature. Eiffel figured out that the shape would experience zero wind load on the diagonal elements. Doing so permitted the "lightweight" iron structure to be built with relatively little metal. Its longevity is testimony to its superior design.
Say you are being held captive in a room that is secured by a cipher lock that requires the successful calculation the Xth root of some
number Y (X is not an integer). A timer limits your opportunity. A wrong answer gets you a torture session where you are forced to listen to
loud Christina Aguilera music. Fortunately, you are an engineer and as such always carry a table
of logarithms in your pocket. Your captors, being political science majors, must carry calculators, and think your log table is a track betting
sheet, so you can keep it. Could you escape? Click here to find out how.
|A young woman, living alone in New York City, was continually having her apartment broken into. Each time there was a break-in she would add one more door lock, but to no avail. At seven locks, she got the bright idea of only locking some of the locks and leaving the others unlocked. It worked! No more break-ins: The burglar would unlock the locked locks, but would lock the unlocked locks.|