I have been wanting one of these for a while... I would love to build my own.
I think it was an original design. The bead is on the input. It is opamp based and the optional volume pedal resistance is in parallel with the feedback resistor. If I remember, one half of the opa2134 is used as a buffer (which is always on) and the other half is used for the boost. Wouldn't take much to roll your own. I need to look through some stuff, anyway. I will try and find the schematic. No luck. I started tracing it, again. I got the power section traced and the input. Still, need to finish the signal and the volume. It's a MAX1044 that gives you +/-9V. Will probably have time to finish it up this weekend. Anybody, have any ideas on how to measure a ferrite bead. I guess I could get a signal generator and send some high frequencies through it and see where the cutoff is. I could always make a guess of 600-1000R. Got it roughly worked out. Need to desolder a couple caps to measure them. Luckily, the resistors have the values on. It's mostly smd.What was it a copy of? Also on the input wire or like an inductor?
I looked at that schematic a while back. Somewhere later in that thread I believe the designer discouraged building that particular circuit.This is supposed to have 20db of boost. How does it look?