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Cathode Sputtering

By Sweetwater on July 9, 2015

A potential failure point for the cathode in tube amplifiers. When stray gas molecules in the valve become ionised by the electron stream, you get cathode sputtering. The positive ions accellerate toward the more negative grid and cathode. If these manage to miss the grid then they may crash into the cathode, physically damaging its surface.

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Cathode Sputtering

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Cathode Sputtering

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