Need an 11SP22 for a 1967 portacolor

[Electronic M]

Originally Posted by Turle

Unfortunately it’s behaving more like grid leakage almost, where it starts off fine but after it heats up for a bit the short creeps up to the point where the whole screen goes red.

You still might be able to do it... Especially if it takes longer to clear than the cathode does to loose emissions after power off, just a bit riskier that way.