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In Reply to: RE: Here we go again. posted by Jim McShane on February 16, 2017 at 19:26:48
If you had your 'druthers, would you want a metal shell? I always assumed that the metal shell was a net negative and could have something to do with a sonic coloration that I think I hear. (I hasten to say, "I think".) I wonder whether sser's idea of grounding the case to the outer foil would make a positive difference in sound. But then, you have to identify the outer foil, which I found to be difficult to do with the outer metal case getting in the way.
Follow Ups:
I have encountered no problems related to the metal shield/can at all Lew. I've soldered ground leads to the shell and listened to the caps with the shells both grounded and not grounded. I can't hear any difference. I find no audible difference based on the orientation/outer foil location of the cap.
Most of these observations were done with the caps installed in a "McShaned" Citation II amp and in some other vintage gear.
So in the circuits I deal with I'm not bothered by the shell at all. And I am VERY pleased with the sonics. My friend and Grammy Award winning jazz bassist Phil Palombi has a Citation II amp I built for him that uses K40 coupling caps. The K40 shells are ungrounded BTW. He says it's the best amp he's ever heard - and he has incredible ears. My own opinion of the amp's sound is equally high.
That's my $0.02 worth anyway!
nt
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