Tonepad tubescreamer, tone pot issue

[JebemMajke]

I've built this legendary pedal. And i;ve used random 4558 and its great. I'll try different opamps. But I think I'lll keep this one.

Anyway I have an issue with a tone pot. After 12 o'clock there is a "pop" and the sound is dark as if it was at 7 o'clock. Until I turn it back to 11 o clock and from there to the lowest setting it works normally.

[Labaris]

Post a photo of the pot to see the wiring. Did you try another pot?

[JebemMajke]

PCB mounted. Didn't try another one. It's a bit late for pot changing.

[Mark Hammer]

Have you considered cleaning the pot?

[Mustachio]

Never to late to change the pot , but I was just about to suggest cleaning the pot too, mark beat me to it hehe

Maybe its a bad pot or maybe there's just a lil goo in there from the factory that could get cleaned out with a little spray.

[JebemMajke]

Have you considered cleaning the pot?

Late as in "I'm going to bed, because it's half past midnight, and I'm dog tired"
I've changed that little sucker and right of it worked. Thanks

[Mark Hammer]

Meh, it happens...to all of us.

Congrats.

[JebemMajke]

So far I;ve tried
random 4558 ( sounds cool, vintage, high middle without dumping the bass )
an 6558 i've got from an old vcr ( sound is gated saturated and modern ... not as high on gain as i expected, my guess is this thing requires rebiasing )
Ne 4558 ( same as that random no name 4558 but with more noise and more mids )
opa 2604 ( shines like a diamond, mids, treble, bass ... everything is there and the overall sound is beautiful )
jrc 4580dd ( high gain, low noise, decent mids ... no wonder this thing goes into riot, but it's far from tubescreamer sound. Truly a high gain dirt box with 4580dd )
1458 ( more bass, more gain than 4558 ... nothing special )

Tomorrow I'll try some more opamps. Opa2604 sounds amazing, but that's not that classic tubescreamer sound. My guess is that this opamp with leds and/or germaniums would sound wicked.

[JebemMajke]

Opa2604, Op2134 and 1458P ( N was good as well, but P had less noise and more dynamics ) sounded the best. Lowest noise, the best dynamic response. Opa2604 sounded the best with single coils though.