[continued from previous message]   
      
   LPF with RC and pole at 20kHz. The signal at the anode is taken to a   
   preamp with gain over 1,000 so I can see the noise on the CRO and   
   apply it to a power amp and speaker.   
      
   By working out the total gain and noise voltage measured I can work   
   out what the noise is at the grid input.   
      
   Patrick Turner.   
      
   > Cheers   
   >   
   > ian- Hide quoted text -   
   >   
   > - Show quoted text -   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)