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previous: Stan Cotey I have seen people add a switch tha... -- 9/27/2000 4:23 PM view thread

Re: The true sound of S.E. Class A not push pull etc. for guitar.

9/27/2000 5:20 PM
tommy
Re: The true sound of S.E. Class A not push pull etc. for guitar.
Just to throw this in, I have always been under the impression that when switching a push-pull to single ended as described above, the bias may need changing to get the now single-ended tube in its proper operational area. This is more so for push-pull amps biased for class AB, where the tubes are not set at mid-swing on the transfer curve.  
 
This kind of ties in with the Class A discussion that is going on in another thread. If the push-pull amp is Class A, then the signal can just be removed from a grid with no change in operating point. If it is biased near cut-off in push-pull AB operation, removing the signal from one tube(side) will give a very distorted output, in effect, only half the waveform.  
 
Just my thoughts.  
 
Chris