I am wanting to build a tube pre to run into my Soldano & Whitney DV-66. I run no other effects other than a Exotic BB . & only run it to slightly push. Does someone have a schematic for something other than a peanut tube thing..well anything other than 12ax7.. Heck even a globe of 80 years old would be cool.!!!!!!!!!!!!!!! Then I can ditch my last SS guitar device, namely the Exotic BB & all will be good.