Dumont RA-109A help needed - very little high voltage

[old_coot88]

Originally Posted by kramden66

...i don't have a tick tick i have a rappid sound that causes the image to get in and out of focus and slight chage in brightness and it jitters the image..
mike

What you describe sounds like one of the leads going into the CRT socket is broken loose from the lug. Have you checked there? Or maybe one of the lugs is not making contact with the CRT pin.

[ggregg]

My RA-109 had a similar issue. It was coming out of the doubler circuit. Cleaning eliminated the issue, for now anyway. It was up by the caps things that attach to the top of the tubes. Carbon traces, I assume.