hi there,
AC128 is a PNP transistor, I used a NPN in my setup, because PNP uses positive ground.
This means: if you use a PNP transistor, you'll have to connect the ground where the +9V now is and you will have to turn the electrolyte C3 around. Positive side of that cap touching postive ground
It's a boosted overdrive and R1 determines the voltage on the collector. Optimum operation for the transistor is 4.5V but putting it higher will result in dirtier sounds still.
mm
EDIT: I finally made some decent soundclips with my BF Super Reverb. Recorded with SM58 mike, no processing.
Clean setup: Strat's neck PU, Texas Special
Download GermaniacClean.mp3
Boosted: Gradually turning the gain up, it turns out that it clean boosts and distorts at the end of the taper. Before the final riffs you can hear me putting the mike back a bit
Download Germaniacboosted.mp3