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Follow-up:
Filament voltage with existing damaged suppressor after fully heated up = 6.44 volts
Voltage with resistor bypassed = 6.7 volts
So not spectacular but nothing to sneeze at either, 1/4 of a volt, that's about a 5% increase in the filaments. I'll see if I can notice any slight improvement in the brightness out of the pic tube with the booster off of it and the resistor bypassed.
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