This Guitar preamp Circuit based FET can strengthen the spool guitar quite well and can distribute the signal through a long guitar cord. this Guitar based FET preamp circuit has a high input impedance and low output impedance.
Guitar preamp circuit is based FET type BS170 and a few passive components. The bias voltage on pin G (gate) is provided by two resistors R1 and R2. Both resistors serves to adjust the input impedance of the circuit guitar preamp.
Guitar preamp circuit is based FET requires only a few mA current, so it can be operated with batteries.