Hi-end GM70 amplifier with only 2 stages

[45]

With a larger value coupling capacitor the amplifier will be more prone to blocking distortion in case of grid current.

You can tame it by using a resistor between the cap and the grid (grid stopper). Of course it is not like removing it as it happens with interstage transformer or DC coupled cathode follower.

 

[45]

Thanks Pieter. Not knowing a lot about actual amp design I have to ask. Is blocking distortion in this case a good thing?

No. Guitarists call it "farting out".

 

[djn]

Thanks 45.