vacuum tube
8 of 12 from Images: The inner life of gadgets
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In the middle of the 20th century, a key piece of electronic technology was the vacuum tube. This one is a Teslovak KT88S. According to the Web site for Penta Laboratories, the KT88S and other "totally new" vacuum tubes are "handmade in limited quantities...in the classic European tradition."
April 1, 2009 2:03 PM PDT
Photo by: Courtesy of Satre Stuelke, Radiologyart.com
