Time to get this site upgraded, so we are passing the hat around. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html
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Before I started reading up on the subject (before websites like this one) I used to assume that all picture tubes were rebuilt in big vacuum chambers of some sort.
The closest thing that actually happened that way is of course NuVistor production.