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Old 4th Jul 2020, 10:41 pm   #3
slidertogrid
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Join Date: Apr 2005
Location: Peterborough, Cambridgeshire, UK.
Posts: 1,897
Default Re: It's got a valve gone!

Hi Christopher
It is difficult to see if there is a crack there are some marks around the pins in the glass but I wouldn't say they were cracks . Normally when a valve has lost it's vacuum the getter goes white and it is easy to spot in the chassis.
The getter on this has gone sort of see through with a slight silvering maybe the vacuum went slowly when the valve was hot?
It's definitely gone to air though as the heater has continuity but doesn't light up.
The set worked last time I used it until I switched off it didn't fail when on then it failed to work today when I tried it so as to when the valve failed is anyones guess!
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