Quote:
Originally Posted by Dan Starnes
Hmm,, My puter is in the shop and I cant upload pics from my digital camera onto this laptop. I will take the back off this weekend and take a pic once I get my puter back. Should I get a pic of the gun from a 12 oclock position, or 9 oclock, or does it matter?
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The angle of the photo does matter. If you look at the attached document you'll see a gap between two electrodes that is at an angle. That's what we'd be looking for.
When you said there was a raster, were there actually scan lines or just a glowing screen?
Andy's explanation of the ion trap is correct and if it is not adjusted correctly it can cause one of the grids to overheat as he said. It can actually melt a hole where there shouldn't be one or enlarge a hole resulting in a loss of ability to focus. See
https://www.msu.edu/~yurkon/Document...adjustment.pdf
It may be as jr_tech suggested and that the tube is rebuilt and they put in a straight gun. That wouldn't have been the best idea. The Silver Screen "85" tubes were aluminized to increase brightness and not to prevent ion burn. The optimum thickness of the aluminum is different for increasing brightness and preventing charging effects, than it is for stopping ions. Though it will still help.
John