the fet preamp is connect to the input of the fender tube  amp

Fender volume kit

connect all the component in the guitar out put jack

the preamp is use 9 v battery to operate it

use 2sk 606 fet and japan cap to build

connect the preamp from guitar to fender tube amp

it show how a guitar output to the tube amp

connect the preamp  to other fender tube amp

more other information