From: lkj.3232@yahoo.com   
      
   (Disclaimer: I don't have extensive theoretical radio knowledge!).   
      
   I rebuilt the amp 10 years ago and it has been fine. However, I accidentally   
   turned the volume up too high and it now has an extremely loud hum (unaffected   
   by the volume control) with no trace of the pickup signal.  I have a valve   
   tester and a cap tester    
   so checked the valves and rectifier - all were good. I then checked all the   
   electrolytics and these too were good as were the speakers. Could this be a   
   blown output transformer? Are there any checks I can do on the output   
   transformer - likely resistance    
   readings etc ? If the output trans is blown, could I substitute a spare   
   version from a W1100 ? Thank you for any responses.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)