From: phil_a@tpg.com.au   
      
   "Ian Iveson"   
      
   > Patrick Turner wrote :   
   >   
   > Not one guitar amp   
   > manufacturer has ever put a musician proof biasing scheme under the   
   > chassis of their creation. Shame on Fender and Marshal.   
   >   
   >   
   > ***Surprising. Why not?   
      
   ** Because  NOTHING can be made musician proof  !!!   
      
   Eg. When the spigot breaks off a 6L6, musos plug them in any way it goes.   
      
      
   > It's a while since I've seen a new guitar amp, but I would have thought   
   > some of them might have made an attempt by now.   
      
   ** A number of tube guitar amps  DO have self  biassing.   
      
   Egs:   
      
   All the ones that use cathode resistor bias -  ie Vox AC30 and clones and   
   most single output tube amps.   
      
   Ones that use direct transistor drive to the output tube cathodes  -  ie   
   Peavey Heritage series and most Music Man models.   
      
   But it is still a  VERY  bad idea to let musos chose and install their own   
   tubes.   
      
      
   ....  Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)