Chuck D. Bones
Circuit Wizard
Mode 4 allows Q2 to be biased at or near saturation. The FUZZ pot not only varies the gain. it also varies the bias.
This Week on the Breadboard: The Spirit in the Sky Fuzz
- Thread starter Chuck D. Bones
- Start date
Chuck D. Bones
Circuit Wizard
Here's an alternate BIAS circuit:
Q1 HFE ~ 100
Q2 HFE ~ 140
Q1 HFE ~ 100
Q2 HFE ~ 140
Cybercow
Well-known member
Green is certainly the easiest. Blue entails cutting a trace cuz lugs #2 & #3 are joined on the PCB.
genXslacker
Well-known member
I'm away from home for a few more days, but that's going on a breadboard as soon as I get one in arm's length.
Chuck D. Bones
Circuit Wizard
One more mod. It lets us set the SUSTAIN lower if we want. Maybe nobody does. Max sustain is the same. I also reduced C1.
genXslacker
Well-known member
To me, more choice is always better on a pot, so long as it's functional. The only thing I don't like is when a pot lets me paralyze an LFO or something like that... not an issue here, obviously.
I'm really eager to get these on a breadboard. I'm in the cult that is obsessed by the tone on the record.
Feral Feline
Well-known member
Agreed GREEN is the way to go, as stated in my post, but if blue — NO NEED TO CUT A TRACE!
Should I have gone for blue I'd simply use a solder-lug pot (or simply not solder legs 2&3 to the board — tie lugs/legs 2&3 together on the pot and run the resistor to the Q2-side of C4. Lug 1 as it is, of course.
Nonetheless, I think we're green, Super, even...
Cybercow
Well-known member
Ghak! I missed that entirely. I guess my reading comprehension is now fully exposed. Green indeed.Agreed GREEN is the way to go, as stated in my post, but if blue — NO NEED TO CUT A TRACE!
Should I have gone for blue I'd simply use a solder-lug pot (or simply not solder legs 2&3 to the board — tie lugs/legs 2&3 together on the pot and run the resistor to the Q2-side of C4. Lug 1 as it is, of course.
Nonetheless, I think we're green, Super, even...
