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In Reply to: RE: Damping chassis internally? posted by Audioquest4life on November 27, 2020 at 12:32:53
If you have the chance to look inside the chassis of a CAT SL-1 pre-amp you'll find that damping material is used on the entire chassis. I once tried to find out what the material was but was told it was proprietary.
I tried using EAR C-1002 ISODAMP sheet to line the Hammond steel chassis of a phono pre-amp in the same manner as the CAT but found no discernible effect.
Way back when the Hammond Classic 200 series Power Transformers had a reputation for vibrating I began using EAR SD-40 between these transformers and the top plate which tamed the vibrations. When the 300 series came along the vibration issue was gone but I continue to use the SD-40 under all the magnetics in my builds in the belief that vibrations not gross enough to be felt might still be present and it can't hurt ;-)
Ab Esse Ad Posse Valet Fellatio
Follow Ups:
This is some good feedback. Thank you.
not to impede cooling. I would not encase a transformer in isodamp, for example. I'm sure this is obvious. I do believe in damping the interior of a chassis in spots that don't adversely affect ventilation. And isodamp is apparently good stuff.
... another tweak you haven't tried Lew?
"The party told you to reject the evidence of your eyes and ears. It was their final, most essential command." Alfred E. Neuman
Edits: 12/20/20
As a matter of fact, I have had isodamp inside my preamp for probably 25 years. I used the word "probably" because I haven't spent a lot of time comparing it to other options.
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