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" Add to this that the cathode, grids and filaments are all at or near ground potential, and you see how this can happen to the plates.
In the final tally for this goof, over 350 310A tubes, at 0 a pop, and 200 some odd 311Bs, at a pop, had to be replaced on an emergency basis.
Omdat iedereen afhankelijk is van installaties die goed en veilig werken.
In short, what happens in either case of "sleeping sickness" is that the plate winds up acting as a getter, thus becoming unreceptive to electron reception from the cathode after being plated with contaminents within the envelope.