Quote:
Originally Posted by Eric H
I was going to suggest checking the resistors but it doesn't look like that set has any! 
But seriously, I would look for resistors that have drifted up in value, especially ones that were high value to begin with. |
BINGO! you were right on the money Eric. a 3.9 meg resistor on the 12at7 sync/sep tube. It had gone to 8.2 meg. I also replaced a couple of other resistors that were about 30% out of tollerance too. Picture seems nice and stable here at home. Tomorrow I will reinstall the 24 inch crt and hopefully if all goes well I will take a couple of photos and post them here tomorrow.
Don't know what that 3.9 meg resistor does but it seems to have fixed the problem.
I also pulled the drum out of the tuner and cleaned up all the contacts, and the picture improved quite a bit.
Thanks for pointing me in the right direction.
Bob