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Vacuum tube - Wikipedia
The thermionic vacuum tube and its applications . ations impressed on thegrid. It is, therefore, necessary to make the potential varia-tions impressed on the grid as large as possible. For this
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![Immersion Heating with a Vacuum Tube | [protofusion]](http://protofusion.org/wordpress/wp-content/uploads/2015/01/vacuum-tube-in-water.jpg "Immersion Heating with a Vacuum Tube | [protofusion]")
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Vacuum tube - Wikipedia
Homemade Cathode Ray Tubes.
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Does Anybody Still Make Vacuum Tubes? - RF Cafe
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Bull Gamma 3, 1952(400 vacuum tubes). | Tech history, Old computers, Computer history
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Scientists Are Bringing Back Vacuum Tubes for Computers of the Future
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Vacuum tube operation at amateur grade vacuum.
