From: pallison49@gmail.com   
      
   Xtrchessreal wrote:   
      
   ===================   
      
   > Section 1 is so called due to lower hum compared to section 2.   
   >   
      
   ** The 2 triodes of a 12AX7 / ECC83 are identical, one doe not "hum" more than   
   the other.   
      
   Internal connection arrangements for grids and heaters vary between versions   
   and brands, maybe having a small effect on capacitive coupling if high   
   impedances feed he grids.   
      
   It is very common to use DC voltage for the heaters to eliminate any issues    
   whether grid or cathode related.   
      
      
      
   .... Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)