Maybe I did something wrong on my build! I assumed the tube would glow a little, which it does not. Also, when bypassed, sweeping the gain knob causes what sounds like some self-oscillation style whining.
To be fair, I almost couldn’t get dirty tones on single coil neck. Definitely can on my bridge humbucker.
I realized I was giving it insufficient amperage. I gave it more, but now it does this thing where there’s a sudden drop in volume.