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Sunday, December 13, 2009

Vacuum Tubes

Vacuum Tubes Vacuum Tubes
The vacuum tubes was invented by Lee De Forest in 1907.
Lee De Forest was born o\in Council Bluffs, Lowa (USA) In August 26, 1873.
Vacuum Tubes is a set of metal electronic and grids contained in a glass metal tube.
The Vacuum tubes was used in first generation of the computers.
Formerly used for amplification and switching an electronic circuits, now used CRT(Cathode Ray Tube)

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