From: apogosso@tpg.com.au   
      
   Typo correction. (not very clear on the schematic):   
      
   The famous bridge consists of R36, L2, C8, R20||R21.   
      
   R36 = 47R;   
   L2 = 3uH;   
   C8 = 120pF;   
   R20||R21 = 500R.   
      
   Note that op-amp IC1 is firtually out of the GNFB loop. It is only as a   
   preamp with gain of 15 and for DC stabilisation.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)