Op-Amp Muff Fuzz
- Thread starter MBFX
- Start date
DGWVI
Well-known member
Here's my last take on one (on PedalPCB Mini Muffin board)
Has a few mods, but even stock it's fun. My favorite diodes are infrared and red LEDs
Has a few mods, but even stock it's fun. My favorite diodes are infrared and red LEDs
MBFX
Well-known member
I don't have any of those, but I have a bunch of weird germanium bits and bobs with varying forward voltage. I might do a selectable clipping section...
MBFX
Well-known member
I used 1N34As from somewhere in the former USSR, with Vf ~750mA. It sounds really good! Midrangey, and a lot like the Electra in many ways. It could use more output volume, a little more bass (adjustable would be great), and it would be solid. The first problem is easy to solve with a buffer. The second.... eh. I can increase the input cap value, and that will give me more bass. How to make it adjustable, though? Should I add a passive hi-pass after the Muff Fuzz, and before the output buffer? I figure I could use a variable resistor and that might work
Could do the cap blend on the input cap.
Look at the musket fuzz input
MBFX
Well-known member
I opened another bottle of wine, and made a second. There are three big differences - a TL082 instead of a JRC4558, a 100nF input cap instead of a 10nF input cap, and 1N60 diodes with Vf ~400mA. This is much thicker and heavier. It is also a bit noisier. The two stack really well either way.
I am going to build a third with a 1uF input cap, and likely a fourth with a 10uF. I think I am close to making my perfect bass drive.
I am going to build a third with a 1uF input cap, and likely a fourth with a 10uF. I think I am close to making my perfect bass drive.
Fama
Well-known member
If it's on vero you could probably just change the input cap? Or maybe socket it to test which one you want before soldering it in.
MBFX
Well-known member
What I have found through experimentation is that you can make a really good custom Muff this way. I built a BMP input buffer with a BC239, ran it into a Muff Fuzz with a 10nF input cap, and ran that via a 100K resistor into a second Muff Fuzz with a 100nF input cap. No fuzz control or tone section.
I then tried messing with an output buffer, and eventually just built a custom Little Big Muff. I am impressed with how good it sounds! Great note separation. A low-noise power transistor works really well in the buffer sections! I had some BC140s and they were the best.
I then tried messing with an output buffer, and eventually just built a custom Little Big Muff. I am impressed with how good it sounds! Great note separation. A low-noise power transistor works really well in the buffer sections! I had some BC140s and they were the best.
