Stock photo: vacuum tube 2

Vacuum Tube 2

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4928 x 3264 pixels16.4" x 10.9" at 300dpi
41.7cm x 27.7cm at 300dpi
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»  vacuum tube 2
All modern vacuum tubes are based on the concept of the Audion--a heated "cathode" boils off electrons into a vacuum; they pass through a grid (or many grids), which control the electron current; the electrons then strike the anode (plate) and are absorbed. By designing the cathode, grid(s) and plate properly, the tube will make a small AC signal voltage into a larger AC voltage, thus amplifying it.
»  Uploaded by
osmar01 (||)
on Jan 28, 2012
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