Stock photo: vacuum tube 1

Vacuum Tube 1

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4376 x 3126 pixels14.6" x 10.4" at 300dpi
37.1cm x 26.4cm at 300dpi
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»  vacuum tube 1
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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