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previous: Dave B. The reason a post MV yeilds more di... -- 11/23/2000 12:24 AM View Thread

Re: Bedrock MV

11/23/2000 12:45 AM
Rick Erickson
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Re: Bedrock MV
Dave,  
 
 
 
quote:
"The reason a post MV yeilds more distortion in lower settings is because as you lower the signal going to the power tubes you also lower the feedback level to the PI. Less feedback = more distortion."
 
 
 
 
If you can hear that distortion I'll buy you a beer, heck I'll buy you a case of beer! :)  
 
While your assumptions are technically correct and can be measured on test equipment this is not the distortion of MV circuits. You are more likely to hear the effects of less damping but I doubt you will hear a "gritty" distortion from removing the feedback loop, unless your amp has some serious problems.  
 
The Post P/I MV in question distorts more at lower settings because the P/I's plates are being forced to ground, limiting it's voltage swing capability. If you re-read my original posts you will get the gist of what I'm referring to.  
 
Maybe someone more versed in talking about load lines and that kind of stuff can jump in here and either explain this better or tell me why I'm off base. All I know is I saw it with my own eyes and heard it with my own ears, and a chunk of it fell right on my head...  
 
 
 
RE

 
Replies:
Dave B. Rick,My answer wasn... -- 11/23/2000 4:07 AM