Marshall shredmaster issue

[JebemMajke]

Ic1 tl082, ic2 4558

Issues
1. Only when level pot is at max output volume is the same as when bypassed
2. Contour pot works kinda strange. When it's on the "low" side it has no gain, and sound is complete mud. No matter the eq.

power 8.13v  ( 9v regulated but goes to Dan's humminator which is integrated in my workbench, hence 8,13v )

Volts
Ic1
1 4.07
2 4.07
3 3.70
4 0
5 4.07
6 4.07
7 3.9
8 8.13

Ic 2
1 4.07
2 4.07
3 4.07
4 0
5 4.07
6 4.07
7 4.07
8 8.13

[JebemMajke]

So I've took out humminator.
9v regulated all the way.

ic1
1 4.55
2 4.55
3 4.07
4 0
5 4.53
6 4.55
7 4.55
8 9

Ic2

1 4.53
2 4.54
3 4.52
4 0
5 4.53
6 4.53
7 4.62
8 9


Help guys, plz.

[JebemMajke]

Solved the mud issue
R11 was 100k instead of 100ohm

A bit more volume, but nothing special.

[slacker]

Your voltages look fine, there may be nothing wrong, the original pedal does not have much boost, on mine volume about 3 o'clock is the same as bypass and full isn't much louder.
Making R15 bigger will increase the volume.

[JebemMajke]

Pretty much the same here. 3-4 o'clock is the same as bypass volume. I was just concerned if I've @#$%ed something up. That tl082cn really gives it some punch. Not a lot, but it does increase gain, and sweetens up those harmonics. Nice pedal, I'm really pleased with this build.

I've took out that 4558 ( going to need it for a tube screamer ) and placed tl072cn in it's spot. Little to no difference, in my opinion.