Three-channel guitar preamp (stompbox)

Main board.

Schematics (pdf)

Ready to transfer PCB (pdf)

Upper side assembly (pdf)

Since the pedal powered one voltage ~ 14V, rectifier bridge B1 is not installed and instead it soldered two jumpers. Rectified voltage fed from the power supply

Bottom side assembly (pdf)

PSU.

Schematics (pdf)

Ready to transfer PCB (pdf)

Covponents positions (pdf)

Control board

Schematics (pdf)

Ready to transfer PCB (pdf)

Upper side assembly (pdf)

Bottom side assembly (pdf)

Program

Clean channel controls (pdf)

Red/Blue channels controls (pdf)

For power amplifier overdrive simulatiom used

Micro power amplifier for line recordimg

Inside view.

Samples kindly recorded Denis Soloviev (Denn).

Clean

Clean trough micro PA

Clean trough micro PA with speaker saturation simulatiom

Crunch

Crunch trough micro PA with speaker saturation simulatiom

Lead

Mix, all three channels