In going forward with this set, how vital is it to have a test CRT like a 3BP1 or the like to protect the 7JP4, now that I know it seems to still have life in it, that was my biggest worry, that it may be dead, but the fact it made a spot on the screen w/o HV or focus is good!
going to need a better isolation transformer as well, as I don't want things to fry when I debug this thing.