On V2, has anybody done this while trying to fine tune the Express? Its easy enough to do, add a trimpot of 50K value and change the resistor to something in the 130K range. It seems that given the garden variety of tubes out there, there might be some magic to be had from something less than a $60 Tungsram or whatever.  
Anybody?
			
			
									
									Has anybody tried using a trim pot on the 150K resistor?
Moderators: pompeiisneaks, Colossal
Has anybody tried using a trim pot on the 150K resistor?
Most people stall out when fixing a mistake that they've made. Why?