Quote from: sjturbo on February 20, 2014, 04:43:40 PMThis thing has lots of stages and most have some tone shaping between stages. There are three sections. The first section, Q2, Q3 should preserve a fairly clean signal and just add low amounts of distortion. 4.5V or 5V would be good for those stages. In the OD section, anything goes. This section is where the Ice Pick tone probably comes from. Try tweeking VR3 high and VR4 low, or vice versa. You can't hurt anything, just try to get a pleasing tone without the Ice Pick treble. The third section around Q7 and Q4 will have to be a compromise to get good tone in both modes. You should probably stay close to 4.5V but try anything. VR7 gives a treble rolloff, use it in moderation to get rid of fizz. I suggest you just adjust the pots by ear, take notes and then measure and write down the voltages. It may take some time to find what you like.
What effect would reducing the bias voltage's have on the gain stages?