Quote:
Originally Posted by em536716
The spot is quite bright!
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In a word, "Wow"! No sign yet of an ion burn, at least from the photo.
Before signing off the tube as definitely good, it might be worth checking for grid-cathode and heater-cathode leaks. I suggest using an Avo or similar on the high resistance range and test 'cold', with the tube unplugged from its base. The situation can unfortunately change when 'hot' but I would tend not to run this tube without proper operating voltages and scans because the (pristine?) phosphor could so easily be damaged. Just my opinion.
Steve