Guitar Pedal Mod - BJT Transistor Gain

How to change the gain on some popular overdrive and distortion pedals such as the EHX LPB-1, Big Muff Pi, Boss HM-2, Boss FZ-2, and DIYGP 10 Min Dirt and Boost as well as others. This applies to BJT Transistors in a Common Emitter Amplifier setup. If you want the DIYGP 10 Min Dirt and Boost PCB you can get it here: http://www.diyguitarpedals.com.au/sho...