Questions About the 21AXP22 Color CRT

[Electronic M]

Originally Posted by old_tv_nut

Don't know if nickel plating would do it, but yes.
I wonder if welding around the ding would work.

I bought some very expensive vacuum sealant that was supposedly rated to withstand the oven temperatures. Scotty put it around the metal-glass seals (where he thought the problem would be), but of course we learned much later that wasn't it.

If that was Vac Seal ISTR that some collectors debunked it as ineffective....I kinda want to find where I read that and see what grounds they debunked it on.

[old_tv_nut]

Originally Posted by Electronic M

If that was Vac Seal ISTR that some collectors debunked it as ineffective....I kinda want to find where I read that and see what grounds they debunked it on.

Re-reading what I wrote, I'm not 100% sure now if the sealant was supposed to go on before the high temp evacuation or after. I think the tube took a couple/three days to go bad after rebuilding. Scotty showed me the blue glow with the Tesla coil when I drove from Chicago to Des Moines to pick it up. The impressive thing about the leak detector is that it found the location of the tiny leak immediately when the tube was tested months later.

[reeferman]

RCA paper published in June '56. Twenty five pages talking about the recent improvements in the AXP.

https://www.earlytelevision.org/pdf/..._kinescope.pdf