Lead Solder Overdrive treble/bass seems to have no effect

[Nix]

Is it something I did or is just the way the board works? Mids work fine but bass and treble don't seem to be working. Deep switch works great.

 

[Nix]

The treble was the only lug pot, the rest are pcb mount. It was making contact with the toggle switch. A little black tape fixed that but I'm still stuck on why the bass isn't working.

 

[BuddytheReow]

Post some pics of both sides of the board. This is pretty much a Marshall tone stack, so no voltage readings are necessary here. You probably have a bad solder joint or C14 might not be the correct value.

 

[Nix]

Post some pics of both sides of the board. This is pretty much a Marshall tone stack, so no voltage readings are necessary here. You probably have a bad solder joint or C14 might not be the correct value.

Thanks! I'll check that out. It was a kit from Musikding so it's more likely a bad solder joint. The bass pot measures at 500k for some reason but it is a 1M.

 

[jwin615]

Thanks! I'll check that out. It was a kit from Musikding so it's more likely a bad solder joint. The bass pot measures at 500k for some reason but it is a 1M.

There is some parallel resistance when in circuit. I'm assuming you measured it in circuit.

 

[Nix]

There is some parallel resistance when in circuit. I'm assuming you measured it in circuit.

Yes I did, I didn't know that, thanks!

 

[andrewsrea]

Check your potentiometer sweepers (lug 2) for continuity (bad pot check). Also check C12 + R16 values (15Khz high pass bleed). Check all the values in the tone stack.

 

[Nix]

I replaced the pot and still the same problem. This time I used a lug pot so I can see in behind it. Will check C12 and R16 and all my joints, that's probably what it is.

 

[Nix]

Seems like bass is stuck at halfway, still no control with the pot.

 

[swelchy]

pictures dude.. pictures..... and do you have the back of the lug pot insulated etc etc... again.. clear pictures of your build front and back

 

[Nix]

Sorry for the delay! I've been using as it is and was embarrassed by my work because I built it when I had a cannabis problem. I hope you can help me solve the issue. I had black tape on the toggle switch to insulate it from the treble lugs but I don't think it's working. The bass pot had black tape on it but I just put a proper dust cover on it because I had one available.