Sparkle Boost problem in Rhodes Piano

[whannah1]

Hey Y'all,

My first post!

So I'm a beginner with these pedal circuits. I built the sparkle boost circuit and then instead of putting it into a pedal housing I built it into the faceplate of my rhodes piano. At one point during the process, the thing worked great! but since then I wired in an LED and a bypass switch and moved things around to make it look nicer and now I have a problem that I have no clue how to troubleshoot.

The issue is that when the gain is all the way up, there's no increase in volume. Turning the gain down lowers the volume, but when I flip the bypass switch on, the signal is much louder when bypassed. How did this happen? it definitely did not work this way the first time I got it working. The thing used to scream when the gain was turned up.

Could this be a bad transistor? I'm using an MPF102. I've messed with the bias for the transistor, which doesn't seem to fix it. I've also just tried wiggling the wires and components to see if anything is loose. The pedal seems to work fine except for this huge drop in volume.

I should also mention that I omitted the volume knob, so the circuit only has the gain knob, leaving the volume turned down can't be the problem.

I didn't change anything on the circuit itself (that I know of). Any suggestions on things to try or other peoples past experience with problems like this would really help.

[whannah1]

I just realized I should have put this in the main forum. I'll repost there.