Portacolor early model repair

[init4fun]

Originally Posted by stragulus

I had taken a video of the set in a darkened room luckily and could see that the popping sounds were from what looks like arcing in the neck (area) of the tube. Can't tell for sure but can't really see what else would arc there. It also came with a 'pinging' noise that very much sounded like what it would sound like if you'd flick the crt with your nails.

Anything else I should think of checking? Going to check on the diodes to see if that theory holds up.

If you only measured the B+ with the sweep tubes removed and not with them in place that would easily explain the 100 volts too high reading . Also , many times arcing in the neck is an indicator of a gassy CRT . You may want to determine if the CRT is actually good , or if not that you can source a good replacement , before spending the cash to recap & restore the set ....