The relationship of volume and overdrive is nonlinear with respect to the control knob. Volume increases in a logarithmic fashion, while overdrive increases exponentially. You can get a clean boost for the first half of the control knob travel, then a subtle amount of soft clipping drive is layered in until dominating at the extreme setting.
The nonlinear amplification control knob adds clean boost & slowly layers in a soft clipping overdrive.
9V center negative power supply or battery.
- jfet operational amplifier circuit
- about 10db clean boost, plus another 5db dirty boost
- clean gain and overdrive sections controlled simultaneously
- current draw: 5.9 mA