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1953 Philco 21" B&W tabletop - gassy CRT?
I thought I would pull out a few of my as of now-unrestored 21" B&W tabletops to check the CRTs and assess their restorability, and I've come across something concerning with a Philco from 1953. The CRT has absolutely no cutoff, but it tests like a brand new tube with the cutoff control maxed. There is a blue glow visible in the neck of the tube which varies in intensity with the adjustment of the cutoff - is this a gassy CRT? There are conflicting reports online, so I am unsure if I want to part the set out or not yet. The picture tube is a 20DP4A, which doesn't seem to be very common.
Any input would be appreciated.
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Last edited by cj_reha; 10-26-2019 at 06:34 PM.
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