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Re: M149 cracking noise
Author: Klaus Heyne
Date: 06/21/2013
Still sounds like tube discharge noise to me. How did you change the tube? It's not exactly easy. And what replacement tube was used? A 6111? 8254? EF732? Or another type? Was it a Neumann-selected and sourced tube? Some of the series of tubes used in M149 were more prone to be noisy than others. So even though you replaced the tube, it also could have been noisy.  
 
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