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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

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 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 tying 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:

AirplanesAndRockets.com

Copper Mountain Technologies (VNA) - RF Cafe

Chart of Electromagnetic Radiations

Chart of Electromagnetic Radiations - RF Cafe

You cannot buy this amazing Chart of Electromagnetic Radiations anymore, but thanks to the folks at Lawrence Livermore National Laboratory, extremely high resolution image files of it have been placed on the flickr website. The chart showed up in Popular Science magazine recently. W.M. Welch Manufacturing Company (now Sargent Welch) originally sold the wall poster in 1944, so the content does not reflect knowledge gained in the last seven decades, but its sheer artistic beauty and amazing content is enough to bring a tear to a technophile's normally staid eye. Even if you do not print out and hang it on your office wall, you owe it to yourself to at look at the 10000x6958-pixel version. The camera used was undoubtedly a little higher quality than my personal point-and-shoot mode.

Unfortunately, Sargent Welch no longer sells this chart; however, they do sell many other very fine charts that you might consider, including a newer EM spectrum chart.

Visual Electromagnetic Spectrum Poster (Saargent Welch) - RF Cafe

Visual

Electromagnetic

Spectrum

Visual Electromagnetic Spectrum Poster Type 2 (Sargent Welch) - RF Cafe

Visual

Electromagnetic

Spectrum

Cyclical Continuum Elemental Properties Poster (Sargent Welch) - RF Cafe

Cyclical

Continuum

Elemental Properties

History and Fate of the Universe (Sargent Welch) - RF Cafe

History and

Fate of the

Universe

 

 

Posted November 21, 2013

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