What can you do?
A simple mod is to replace the fuzz control with a fixed 1k resistor – this sets the dc bias properly. Then connect the 22uF to the emitter of Q2 and use a 5k or 10k pot as a variable resistor to control the amount of distortion, as shown to the left.
The new larger value pot should be a reverse audio taper for best results but a linear will do if that’s all you have in the junk bin.
It is not the classic circuit but this can get you going on short notice when you lack the proper parts.
Jack's original post is here on his blog: http://www.muzique.com/news/fuzz-face-mod/
Also see: Joe Gagan's EASY FACE schematic :
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