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Triode splitter question


 :
10/20/2000 7:17 PM
JaySG
 Triode splitter question
I want to split a signal to drive two different tone stacks (without any switching components). My inclination is to tie the grids together -- pins 2 to 7 for a 12AX7, and use separate plate Rs and cathode RCs.  
 
Would I want to try to isolate the grids from each other with a resistor ?
  
10/21/2000 1:21 PM
Ray Ivers
Jay,  
 
If it were me, I would use the second gain stage as a cathode follower, and drive both tone stacks from its output. A 12AX7 CF should be able to handle this load pretty well.  
 
Ray Ivers
  
10/23/2000 2:51 AM
JaySG
Thanks Ray,  
 
I've played with a CF in this amp before and I didn't like what it did to the BF tone I was trying to maintain.  
 
I built it up with the grids connected and it sounds fine on both channels -- one being BF and the other dumble ODS. There was close to no difference for the BF channel but extra gain and a bit of treble on the ODS channel.
  

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