Request.
The transistor may be difficult to get hold of but you can try other PNP silicons in its place. The datasheet suggests the hFE of the 2N4061’s was 90 – 330, but check the pinouts of your replacements and insulate/twist the pins if necessary to match the layout.
The filter created by the 1n output cap and 100K resistor will cut a lot of bass (after all it is a treble booster), but consider socketing it so you can experiment to find the values that best suit your style and gear.
