Correct way to wire input cap blend in a Fuzz Face circuit??
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sickman82
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- my favorite amplifier: Vox AC30
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I've had a versatile FF type build for years now with a bias pot for each Ge tranny and a input cap blend between 100n and 6.8uf. It's just suddenly occurred to me that depending how you have it wired, isn't the pot on the input cap blend going to be adding resistance and therefore altering the impedance of the circuit? What is the 'correct' way to wire this up? Or is a switch between two caps the only way to do it without changing the character of the FF circuit?
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Manfred
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Do you apply the blend circuit as in the following schematic shown?sickman82 wrote:I've had a versatile FF type build for years now with a bias pot for each Ge tranny and a input cap blend between 100n and 6.8uf. It's just suddenly occurred to me that depending how you have it wired, isn't the pot on the input cap blend going to be adding resistance and therefore altering the impedance of the circuit? What is the 'correct' way to wire this up? Or is a switch between two caps the only way to do it without changing the character of the FF circuit?
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sickman82
- Breadboard Brother
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- Posts: 99
- Joined: 16 Jun 2011, 18:12
- my favorite amplifier: Vox AC30
- Completed builds: BYOC OD2, Lovepedal COT 50, Lovepedal Kalamazoo, Zvex Fuzz Factory, Zvex Wooly Mammoth, D*A*M Meathead, EHX Green Muff, EHX IC Muff, Gary Hurst Tone Bender MKI, Fuzz Face (Ge & Si), Catalinbread DLS MKI, Black Arts Pharaoh
- Location: Yorkshire, UK
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See the attached image for a crude schematic.. it seems that I do have it wired that way. Is the resistance of the pot not in play here?
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“Birds scream at the top of their lungs in a horrified hellish rage every morning at daybreak to warn us all of the truth, but sadly we don't speak bird.”
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sickman82
- Breadboard Brother
Information
- Posts: 99
- Joined: 16 Jun 2011, 18:12
- my favorite amplifier: Vox AC30
- Completed builds: BYOC OD2, Lovepedal COT 50, Lovepedal Kalamazoo, Zvex Fuzz Factory, Zvex Wooly Mammoth, D*A*M Meathead, EHX Green Muff, EHX IC Muff, Gary Hurst Tone Bender MKI, Fuzz Face (Ge & Si), Catalinbread DLS MKI, Black Arts Pharaoh
- Location: Yorkshire, UK
- Has thanked: 2 times
- Been thanked: 3 times
I accidentally locked this thread! I know that by wiring it this way the signal always has a path through the 0.1uf cap, but what I don't understand fully is how the pot isn't adding resistance. Can someone kindly explain this to me? Thanks.
“Birds scream at the top of their lungs in a horrified hellish rage every morning at daybreak to warn us all of the truth, but sadly we don't speak bird.”