(07-02-2021, 06:23 PM)Bushbaby Wrote: The issue is that the volume and tone controls are situated between the screen grid resistors and the grid of valve. What’s more, the two channels are joined by a couple of 470k mixer resistors, which attenuate the guitar signal before it even reaches the valve. The volume and tone controls of valve amps – including most Marshalls – should come after the first valve stage.
I don't understand that statement about the screen grid and grid of the valves, are you sure they are not talking about another amp with a modified circuit.
If you modify the circuit by adding a preamp then it will never be a Marshall 10 watt clone and you will always wonder what one sounded like.
Mike
