From: ruffrecords@yahoo.com   
      
   Ian Iveson wrote:   
   > Ian Bell wrote:   
   >>   
   >> Looks like there is some frequency dependent. I made   
   >> additional tests at 100Hz, 500Hz and 4KHz as follows (grid   
   >> distortion in original circuit):   
   >>   
   >> 100Hz   2H -63dB, 3H -65dB   
   >> 500Hz   2H -58dB, 3H -61dB   
   >> 2KHz    2H -49dB, 3H -62dB   
   >> 4KHz    2H -46dB, 3H -65dB   
   >>   
   >> Looks to me like the second harmonic rises with frequency   
   >> but the third varies little so I would guess the 2H is   
   >> coupled somehow from the plate and the 3H is probably the   
   >> onset of real grid current distortion.   
   >   
   > Surely the grid current distortion is assymetric? That would   
   > make it substantially even H?   
   >   
   >> It might be interesting to repeat this with a grounded   
   >> grid configuration.   
   >   
   > Too many tests complicates confusion.   
   >   
   > Ian   
   >   
   >   
      
   But grouded grid eliminates Miller effect.   
      
   Cheers   
      
   Ian   
      
   --- SoupGate-Win32 v1.05   
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