Re: Help with some old TV tubes.
Tube base back on the 17 inch CRT and cooking again in the tester, after warm up last night it started at less than 0.2mA and slowly crept up to 0.8mA, when I tried again this afternoon after a warm up period it started again at around 0.6mA, the within a few minutes to 0.7 and now after approx 15 minutes it is at 0.8mA and a forward voltage drop of 54 Volts, which I think is what it went up to last night. So all in all I think it could be a useful tube.
The existing aquadag is crazed with gaps in it all over the glass, the existing coating will also be very dirty/dusty etc. So I am thinking of cleaning it all off the tubes, wiping down with acetone, masking and coating the outside areas of the tubes with a brush. Has anyone done this to their own CRTs and what sort of results did you get, I will not be able to dry them in an oven so just a warm room will be the best I can do.
Adrian
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