mfretton wrote:
On the picture of the PCB showing the '69 mods there are 33k & 470 ohm resistors on the top right (where the contour pot is connected) but on my PCB there is a third resistor, 4.7k; what is this doing?
Thanks for your help. Matt
The 4.7k is for the LED. I think there's a couple different layouts here.
I just did these mods in my big, ever-changing FUZZ. Really nice to play with but my CONTOUR knob seems to just act like a volume boost when I turn it counter-clockwise. Otherwise it sounds better. I can't quite recall the unmodded sound. But more knobs are always cool. The new "bias" along with my other bias from the trimpot create cleaner - fuzzier settings. I say "bias" because i thought it was just a control to increase/decrease low-end.