Friendly Fire Fuzz volume mod

[SteveScott]

Sorry, I'm still learning. I'll check that tonight when I get home.

 

[SteveScott]

OK, voltage from the center leg of Q1 to ground is 2.548v.

 

[Chuck D. Bones]

That's a good reading. Not much to be gained by altering R1. Now make the same measurement on Q2. Q1 determines the volume at the high end of the FUZZ control range; Q2 determines the volume at the low end.

 

[SteveScott]

.777v there

 

[Chuck D. Bones]

If you use the low end of the FUZZ range, then there could be some benefit from increasing R3. Otherwise, adding a booster after the FFF, as BF suggests, could be your best option.

 

[SteveScott]

If you use the low end of the FUZZ range, then there could be some benefit from increasing R3. Otherwise, adding a booster after the FFF, as BF suggests, could be your best option.

Thanks Chuck. I have almost everything to build that, but I'm trying to wait for Tayda to get more 125b's in stock before I place my next order. But there seems to be a world wide shortage on those right now, so the 390R may be some parallel or series resistors, depending on what values I have.
Really appreciate the help.

 

[Chuck D. Bones]

That 390R is not critical, you can use anything from 100R to 680R and it will work.

 

[SteveScott]

That 390R is not critical, you can use anything from 100R to 680R and it will work.

Cool deal, I definitely have something that will work then.

 

[SteveScott]

New item by Steven Scott

photos.app.goo.gl

LBP was a perfect solution to keep the same sound just a little louder. I did not have a 2n5088, so I used a 2n5089, and a 200R in place of the 390R, seems to be working fine. Also waiting for some trim pots to arrive, but the full size pot works too.
Thanks for all the help! I may add this to a couple of other pedals.