Valve amp volume control implementation.

[Jez]

I use the log faking method in the diy valve pre I'm listening to right now. Works very well and I've got it so although the pre has 10x gain, volume is nicely adjustable even with my Leak St20 with 100mV sensitivity. As it does have the x10 gain then if you happen to have a power amp of 3V sensitivity then just keep turning the volume up and you'll get there.