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Re: Km56 Noise
Author: Klaus Heyne
Date: 08/17/2013
The one likely faulty component you have not substituted is the tube. I'd recommend to replace it with a low-noise selected, NOS AC701. It's a job for an experienced technician: the tube needs to be carefully fitted and its filaments curled and heat-sunk before and during installation.  
 
Reply
Geoff Michael
08/16/2013
Klaus Heyne
08/17/2013
Rafael Abal
08/23/2013