From: phil_a@tpg.com.au   
      
   "Big Bad Boob"   
      
   > /me trying to think up a rectifier + regulator circuit for negative bias   
   > voltage using 6AV6 or 6AT6 tube.  that'd be fun.   
      
      
   ** Isn't it better practice NOT  to regulate the negative bias voltage fed   
   to OP tubes ?   
      
   Rather, just let it move up and down with the HT as the incoming AC supply   
   varies over time.   
      
   Keeps the plate bias current closer to constant ....   
      
      
      
      
   ....   Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)