You need to keep in mind that we have here a fine example of 3 cascaded gain stages working at rail-tail outputs, as opposed to, say, standard clipping circuits where the amplitude is cut to ~0.5V by the diodes. Here the signal remains at ~8V peak to peak which introduces much more signal into the f...

Okay.. so I traced the schematics for this pedal.. but placed them in the wrong forum (duh): https://www.freestompboxes.org/viewtopic.php?f=1&t=18561 Anyway - matched JFETS indeed (all ~4V @ drain). J201. Straight forward design. Gain, Gain, tone, output buffer. A few things noted: The tone stac...

OK - here are the bias points: First FET - 4.08V at the drain. Second FET 4.00V Third FET - 3.95V Last FET - 3.93V VCC set at precisely 9.00V. Doesn't look like either hand picked/matched set or really good bias point - I'd bias them for 5V @ drain so I get more dynamic range before clipping but I g...

Hi Sweetalk.. Still have the pedal here (belongs to a friend). I will measure the bias point of all 4 FETs tomorrow. I have seen test points on the PCB for all 4 bias points but not sure they do match..
Also not sure it's worth matching - assymetrical clipping always sounds nicer...

A little follow up on this. The design mimicks either a 5F6A Bassman or a plexy Marshall. The EQ values/gain stage construction is 5F6A (which the Marshall is of course based on). The resistors/pots values were reduced x10 while caps increased x10 to get approx the same EQ curves. This is not a &quo...

Well.. traced this for my own purpose and since I made such a wonderful work, I'd like to share it (since I could'nt find one myself when looking for it).
If someone is interested in the original DSN files, PM me for them.
Nir