RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

About RF Cafe

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 ...

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

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Telefontornet in Stockholm, Sweden

This late 19th century photo of a telephone cable tower in Stockholm, Sweden, is seen frequently on the Internet. The 'telefontonet' tower, owned by Stockholms Allmänna Telefon AB (which later merged with Ericsson), supported 5,500 lines. Those four decorative turrets at the top were added to beautify the tower after residents complained about it being an eyesore. Raise your hand if you think it was a good solution. A couple decades later, the company began burying phone lines underground and the tower was eventually taken down. At a smaller scale, many modern data centers look a lot like this inside with all the network cabling routed - sometimes neatly and sometimes not - between server cards and racks. I was going to post a photo of one of Google's data centers as an example, but of course all the publically available images show only the tidiest of installations with almost no cables exposed.

Telefontornet in Stockholm, Sweden - RF Cafe

Telefontornet in Stockholm, Sweden  c1890


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

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Posted March 17, 2016