Hi!   
   What is the opinion nowadays on using the original tone control by Baxandall,   
   as published Wireless World 1952? Is it still worth incorporating in a diy   
   hifi preamp, or are there better circuits? (Link below:)   
      
   http://hifisonix.com/wordpress/wp-content/uploads/2013/05/Negati   
   eFeedbackTone.pdf   
      
   He states in the article that it works best with a high gain tube like a   
   pentode (EF86?). I would rather use 12AT7 and put a 5687 as a cathode follower   
   after it. I tried simulating his circuit in ltspice but got questionable   
   frequency response, not sure    
   if it was my doing or the tube modeling that was lacking.   
      
   Martin   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)