Cool looking soft clipping overdrive using a discrete op amp setup.
Schematic is avaiable HERE.
Might be something for the HM-2 fans? The gyrator frequiencies and Q's looks promising...
Schematic is avaiable HERE.
An old polish distortion which is based on Ibanez Trash Metal. Which is basically a buffered and boosted Rat circuit with an additional fixed gyrator EQ stage after the distortion circuit.
Schematic is avaiable HERE.