Satronik - FUZZ SUSTAINER
"... a Polish built pedal from the early/mid 80s. ... Currently there's not much info (if any) out there about Satronik ...
So you're probably guessing that the Fuzz Sustainer almost has to be a Big Muff then... And it IS, kinda.
If you were to plug into it and close your eyes you would swear it was one of the beefiest and buzziest and wooliest of Muffs you ever heard! And it did all that while still retaining articulate, thick bone-crushing harmonics.
The sound sits somewhere between a late 70s IC Muff and a Civil War Muff. And honestly is one of the better BMP copies I've ever played. But that's what's crazy; inside the Fuzz Sustainer is not a copy, and not really derivative of anything (I can think of, at least)!
It's running off a 741 chip (*see DOD 250 or Seamoon Fresh Fuzz), and a duo of silicon transistors, a metal can BC109 (I've also seen a unit with a BC108C in its place) and an oddly shaped BC149.
If you're familiar at all with Big Muff circuits you can tell right away that this is something totally different. So it's pretty cool that they were able to achieve an almost identical tone and texture."
cred: tonemachinesblog.com