08-26-2014, 10:19 AM
That guys writes such great articles. I have always loved reading his stuff.
So in the phase inverter of the ampeg we do have high coupling cap values, but there are grid resistors there. 47k grid resistors. and the bias feed resistors are lower than they would be in a fender or marshall (100k in the ampeg vs 220k in the fender/marshall)
There is a lot of feedback in the power amp, the preamp does have a lot of gain, and of course the coupling caps could be dropped to .1uf or even .047uf without much change in sound.
If you are worried about this, change the coupling caps first. just my two cents.
So in the phase inverter of the ampeg we do have high coupling cap values, but there are grid resistors there. 47k grid resistors. and the bias feed resistors are lower than they would be in a fender or marshall (100k in the ampeg vs 220k in the fender/marshall)
There is a lot of feedback in the power amp, the preamp does have a lot of gain, and of course the coupling caps could be dropped to .1uf or even .047uf without much change in sound.
If you are worried about this, change the coupling caps first. just my two cents.