Still Having RCA 8TS30 Issues

[Yamamaya42]

Something to think about, at first my 130v rail was @ only 107V – 109V, then it was suggested that I remove one side of R130 and see what effect it had, it then came up to 138v stable, pointing me to the problem area.

I also fed capacitor coupled composite video into grid 1 of the 1st video amp (after removing the 4th IF tube), at the time and got a very good picture.

[Chris K]

Originally Posted by Yamamaya42

Something to think about, at first my 130v rail was @ only 107V – 109V, then it was suggested that I remove one side of R130 and see what effect it had, it then came up to 138v stable, pointing me to the problem area.

I also fed capacitor coupled composite video into grid 1 of the 1st video amp (after removing the 4th IF tube), at the time and got a very good picture.

I'll try both of those things tonight. Previously, I sent in an IF signal through the first and then second IF stages and got a picture with the same symptoms. I haven't tried composite directly into the video amp yet.

[Chris K]

Originally Posted by Yamamaya42

Something to think about, at first my 130v rail was @ only 107V – 109V, then it was suggested that I remove one side of R130 and see what effect it had, it then came up to 138v stable, pointing me to the problem area.

I also fed capacitor coupled composite video into grid 1 of the 1st video amp (after removing the 4th IF tube), at the time and got a very good picture.

Sorry for my ignorance here...what size and what type cap did you use for the video feed? Let me see if my limited but slowly growing knowledge of this stuff is correct...the reason for the capacitor is to protect the source from DC in the TV?