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Re: Here's three

Joe, I know what you mean. My greatest concern is will it make a quiet tube microphonic. I have begun collecting 6922 pinched waist tubes and if you get one out of four that is quiet you are lucky.
They cost way too much to have an ultra rare quiet 6922 PW turned microphonic due to cryo treatment. Repoprts I have from people who have treated tube is that it lowers the noise floor. I am thinking of the process of exposure to insanely low temperatures and the glass conttracting on the mica and then expanding again when brought back to room temperature. It would seem to be a recipe to loosen the internals. Iwill probably not treat quiet PW's just the noisy ones.

Bart


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  • Re: Here's three - posbwp55@msn.com 12/13/0620:34:20 12/13/06 (0)


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