Wow....saw this early SVT II on CL and thought I would give it a good loving home. Ended up getting it, including an SKB case for 4 bills! Have cleaned it out inside and out, and will take all the tubes to be checked and will biase the tubes upon re-installation. But it cranked up beautifully with no issues when I got it home and hooked up to an 810! So since this has only a "Volume" knob, what is the understanding of how much gain the preamp gets, versus how the common CL and all the rest operate. Any other setup techniques that can be offered?