Quote:
Originally Posted by Tom Albrecht
My instinct tells me that shouldn't be a problem. The grid goes at most 10-20 volts positive with respect to the cathode (I think it is in fact only a few volts because of the cathode resistor), so the power dissipated in the grid will be tiny. Probably gets way more heat from the nearby cathode than from the actual power dissipated in the grid. I was more worried about whether this will cause some kind of cathode stripping or something like that.
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Running it into the positive grid region is probably along the lines of a mild clean and balance on a rejuvenator. Odds are it won't hold it's emission for long...It is probably either going get brighter as the cathode cleans or darker as the remaining cathode gets used up. If brightness improves with use you may want to revert it to stock.