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In Reply to: RE: Marantz 10B noise posted by paul-emile on June 07, 2007 at 05:47:09
I had a 10B that was "squealing" - turned out to be a tube in the multiplex section (don't remember which) - probably wasn't fully locking onto the pilot signal.
Rather than testing them, I find it's better (and quicker) to substitute known good tubes one at a time.
Follow Ups:
Hi,
Thank you for the info, i'll remove the tubes of multiplex, test or replace, these are 12AU7 and 6BU8 of memory, no problem to find , not the same with 6JK6 !
Paul-emile
Given that the problem went away when you switched to MONO-
The problem is in the MPX circuit- tubes are always the first culprit....
Happy Listening
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