[Milsurplus] Smart People: Gassy tubes , again

[Ralph Cameron]

One may remember the trick of restoring CRTs that had lost emission due 
to filament contamination. Some of the so called "CRT" rejuvenators 
boosted the filament voltage with directly heated cathodes to burn off 
some of the accumulated "junk" in the vacuum. Most of this junk was 
metal contaminants. A 10% boost in filament voltage for 15-20 mins may 
help the getter.

Ralph
VE3BBM

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