6S-7 amp update

Okay, I decided that the amp was way out of control, overdriving too much too soon. Two preamp stages was overkill. So I replaced the first 6SL7 (two triode sections) with a 6SJ7, a single triode. (Click below for a bigger picture of the schematic.)



I also simplified the power supply rail, cutting way back on the capacitance. (Again, the original concept was overkill.) Also added a unique midrange switch and a bright/presence switch.

I quite happy with the sound. It's surprisingly loud, and it gets a little raunchy when cranked.