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#1
09-05-2012, 02:01 AM
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Using tubular caps in those HV coupling circuits seems to be the popular wisdom. I have never tried ceramic discs there to find out, but my understanding is that they may distort the scanning signals. What form that would take, I'm not sure. Perhaps anything from poor linearity to a scrambled picture.
As a rule, I don't use ceramic discs in any place where they were not originally used, especially in sweep circuits where high frequencies may beat them up. I have a couple of other 7-inch sets waiting for restoration. If I ever get around to them, maybe I'll try substituting a couple of ceramic discs once the TV is working, just out of curiosity. Phil Nelson 
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#2
09-05-2012, 08:37 AM
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Years ago I used ceramic discs in my VT71 as that was all I could find. They worked fine for years and finally one went leaky. I used the ASC 6KV caps available today and they are fine too. The discs I used were damper circuit discs. My VT71 still has one in the high voltage filter circuit.
I recently was given some .002 12KV Potter brand tubular and will try them after I get my 9L1 Moto up and running. Has anyone heard of these Potter caps?
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