I would try some tubes shields for the 6922 tubes.
Tubes trouble?
Need help and advice.
Have an ARC PH5 Riaa where the tubes were changed two years ago. Sometimes when I play there is a humming sound that changes character when I put my hand on the cabinet and all of a sudden I am completely free of interference again. Where do I start? Guess it's a tubes that's bad. How do I find which one? Can I change just one tubes or do I have to change all of them? Is there any placement of the four that is less critical if a pipe is in worse condition? Thanks fore comments and tips. // Niklas
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