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That said, if I were to play with a big muff to modify it's sound, instead of using low gain transistors to modify the gain staging of the circuit, I would modify the resistors values around the transistors to reduce each stage gain, but keeping the DC bias the same.

Take into consideration that the Bipolar transistor hFE (current gain) it's not the actual gain of the amplification stage in the circuit. That will be determined by the topology and the feedback used. Is that feedback the one that makes the huge variations in hFE usable in real world...

I believe that from 2017 on, all the pedals are SMD. If you want to mod one, try to get one that is not Malaysia made.

What about a PCB ruler with components codes and other cheatsheet like data (for example, a diode with A and K at the terminals)?

Do you have a DMM to measure the power supply voltage? Maybe a bad electrolithic

From a practical POV, mylar cost half but are bigger. If you wanna dig deeper: https://www.ti.com/lit/an/slyt796a/slyt796a.pdf?ts=1709729727125

"Wake up, Mr Freeman. Wake up and smell the ashes fumes."

Hope it's useful. When I started I used a boss DS1 with an SG on a clean channel and I hated it. But later I tried a DS1 with a Strat on a warm marshallesque amp, and I could not believe it was the same pedal. It's not just the way the pedal reacts to the types of pickup sounds, but also the...

Are you using an isolated 9v power supply, so that all the outputs have separate isolated grounds?

It's a pedal meant to be used on a not 100% clean amp. That's why it's fizzy. Are you also using it with humbuckers? That said, I guess I would start with a 4n7 or so cap in parallel to the clipping diodes D11 and D12. You can solder the cap on the back side of the board, so no component...

I've never used inductances in a signal chain, so I wonder if that's not just overkill/over-engineering for just a treble cut. They are clearly not using the core saturation for non-linearity purpuses. Also, even if there's some magic, they are not emulating the cable treble loss because of...

Linear is closer, since the W curve is symmetric. You will have almost all the pot effect at the limits and almost no effect at the center, but the center will remain neutral. JIC: Linear is B

From the Effects Layouts DRIVESTORTION documentation:

From fulltone website: A Contour Knob lets you dial in Midrange, Harmonics and Sustain Seems like the Aion FX Epsilon Silicon Fuzz is pretty close to the Fulltone 69, but adding the Jack Orman pickup simulator at the beginning.

The smooth pot it's at the input. The pot we are referring here it's actually the bias pot.

Oh, it's in series with the 470R. (Also, it's a NPN fuzz face) It's changing a bit of the Q2 bias and common emitter gain, but mostily the output amplitude is increased since the 8k2+470R voltage divider (original circuit values) is been modified. I read the Aion documentation and I dont see...

Hi everyone. I read the whole FSB thread, and I'm still confused. Did people settle with using 1N4148? or any particular schottky (1N5817,BAV99,BAT...)?

There's no pot between the 33k resistor and the 470 resistor there. Could you draw an schematic?

Mess with the transistors bias. What are you trying to achieve with that mod?

Switch both pins 2 and 3 to have the exact same circuit. Switch only pin 2 to have about the same output impedance when the volume is not at max. But circuit will see the volume pot as half the actual pot resistance. Switch the pin 2 and double the pot value to have the same resistance seen from...