B&K 465 acting strange

[Jon A.]

My guess is that emissions will drop quickly under regular use, or suddenly drop to nothing when the filaments open.

Originally Posted by MadMan

I'm pretty sure that means the crt is full of air. Why not just test a known-good tube? You know... like one that's actually inside of a working tv that you have watched recently? I know you have at least one -_-

Yeah, what he said.

If a lot of heat was used for cataract removal, it may have gotten to the guns and compromised the seal at the pins.

[SwizzyMan]

I could've sworn gassy tubes glow a bright purple, not blue due to the discharge of ionized oxygen. I have some tubes that glow blue on the neck glass due to electron bombardment. Is the tester responsive at all?