ODR-1 gain knob

[mark2]

Just a quick gut-check for anyone who's built this: Did you experience limited audible difference in the distortion across most of the gain knob's travel, with a huge boost at the end?

Specifically, in my case, with an A250k pot on the AionFX Andromeda.

I've never played one other than my own, and while it's still a very usable pedal, I'm wondering if I have a problem.

[idy]

I have found linear taper responds better in these feedback-loop gain controls... sometimes.

[GibsonGM]

Try linear, yes...

[Mark Hammer]

Try flipping the leads of the two outside lugs on the Gain pot.

[mark2]

Yeah, I can definitely try a different taper, or probably first reversing as you said Mark.
Thanks.

I guess I was just hoping somebody was familiar with this build and would say "Yep. That's the way it is" or "Nope, you made a mistake"

But I can't imagine what that mistake would be and it sounds good, so *shrug*.

[aion]

In this type of application, A vs. B taper is a compromise between having more control over the low end of the gain range (A/audio taper) or more control over the high end (B/linear taper). Typically there's a lot more nuance to be found in the low end of the gain range, whereas there's not a huge difference between 9 and 9.5 for instance. That's why you typically see audio taper used in these applications. But with linear there is also a drastic jump in gain, it just comes really early in the rotation.

I should also mention that in the Andromeda, the Bass knob does directly affect the overall gain, so it will also impact the gain ratio of the pot. The feel of it may be different with the bass control lower vs. higher. But all the way up, it's the same as the stock ODR-1 which also uses audio taper.

[GGBB]

For the record, my ODR-1 build doesn't have that problem exactly. Clipping doesn't really start in until about 9 o'clock (moderate-lowish output tele). It increases fairly evenly until about 3 o'clock where it has a slight jump (I'm guessing this is the Alpha pot emulating audio taper), then past that there's not much audible difference. Note that it's not completely stock - I've swapped the 2µ2 feedback cap for 1µ - which should exhibit a little less clipping.

You could try a linear taper, but you might also want to try a different brand of audio taper as they are not all equal.