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Old 23rd Nov 2020, 5:11 pm   #14
G6Tanuki
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Join Date: Apr 2012
Location: Wiltshire, UK.
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Default Re: CRT Rejuvenation orientation

I remember attempts at 're-activating' some old CRT computer-monitors that had been 'on' continuously for more than half a decade and were a bit tired.

We did them with the tubes mounted face-up, the idea being that any bits of cathode-material displaced would not fall onto the shadowmask and become lodged there. From memory we did about a dozen tubes and got a noticeable improvement on about half of them. Alas the 'noticeable improvement' merely served to highlight the text burned into the screen-phosphor. The monitors were scrapped.
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