Tweak Fuzz Double-Tweak Mod

[Artie]

Re: Tweak Fuzz Double-Tweak Mod

Hi ArtieToo.
. . . but the C1 value is missing.

It's on my diagram. (Upper left corner.) C1 is 4700pf, which is 4.7 nf, which is .0047 uf. Don't mistake that for .047uf. Caps are never listed in nanofarads, so look for either .0047uf or 4700pf.

P.S. Now I wish I hadn't sold my TweakFuzz.

 

[Supmas]

Re: Tweak Fuzz Double-Tweak Mod

It's on my diagram. (Upper left corner.) C1 is 4700pf, which is 4.7 nf, which is .0047 uf. Don't mistake that for .047uf. Caps are never listed in nanofarads, so look for either .0047uf or 4700pf.

P.S. Now I wish I hadn't sold my TweakFuzz.

Thank, I'm aware about µF, nF and pF :flowers1:
I've understood that C1-C6 and R1-R6 on the top left was for the Tweak selector. It's still missing the other C1 and which transistor between Q1 or Q2 is the 4401.

 

[ehdwuld]

Re: Tweak Fuzz Double-Tweak Mod

Nevermind

 

[Artie]

Re: Tweak Fuzz Double-Tweak Mod

Ah! That C1. I believe that's called a "miller" capacitor. It's probably going to be in the 150pf range. Unfortunately, I can't check for sure because I no longer have my Tweakfuzz. :guilty:

 

[Supmas]

Re: Tweak Fuzz Double-Tweak Mod

Ah! That C1. I believe that's called a "miller" capacitor. It's probably going to be in the 150pf range. Unfortunately, I can't check for sure because I no longer have my Tweakfuzz. :guilty:

Crap:crying: ; Anyway thank you for helping.
And if someone knows exactly what "this C1" is, I'm still interested.:1:

 

[stilwel]

Re: Tweak Fuzz Double-Tweak Mod

The C1 miller capacitor is there to reduce gain at high frequencies to reduce harshness.

Try something between 33pf and 150pf. This cap is not typically installed on a vintage fuzz face pedal.

 

[Artie]

Re: Tweak Fuzz Double-Tweak Mod

What ^ he said. The value isn't critical. It's there to prevent oscillation in the 1st stage. I think.

 

[Supmas]

Re: Tweak Fuzz Double-Tweak Mod

Thank you both. Then I'll do what you say by trying something like 100pF.
This project is more complicated than I thought at first, but the chalenge is really interesting. I'm pretty sure I will have new questions in the coming weeks.