From: IainNG@kolumbus.fi   
      
   "John L Stewart"  wrote in message   
   news:John.L.Stewart.8405728@audiobanter.com...   
   >   
   > Hmm. Interesting use of a 6U8. I'd not seen a half pentode half triode   
   > LPT/grounded grid phase inverter before.   
   >   
   >Where is the link to that 6U8 cct? Sounds a bit like part of the DC   
   > amp used commonly in tubed regulated DC power supplies.   
   >   
      
      
   John. the STA25 is here:   
      
   http://www.freeinfosociety.com/electronics/schemview.php?id=2362   
      
   Iain   
      
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