freestompboxes.org

It is a good sounding mild overdrive to push a tube amp. there are unknown small red diodes in the opamp negative feedback. Here the PN-junktion curve trace of these diodes: Here the PN-junktion curve trace of the 1S1588 diodes: PCB-Layout Ready to print PDF-files: SprintLayout-6.0 file:

Thanks Manfred.
No smoothing cap between th3 1Meg resistor and the diode going to the switching FET's?

Thanks Manfred

Dirk_Hendrik wrote:Thanks Manfred.
No smoothing cap between th3 1Meg resistor and the diode going to the switching FET's?

Thanks Dirk for the closer look at the schematic, you are right there is a 47n smoothing cap, it appears in the layout but not in the schematic.
Here the corrected schematic:

George Giblet found a bug in the Reagun Distortion schematic that has the same switching circuit as the Overdrive.
It is also the same error in the schematic.
Thanks again George.
Here is the corrected circuit:

...aaand a stripboard layout.
+m

The magic diodes, it's probably stabistors?