Annoying Hum

[TinPan]

In this 2017 Gibson SG, that had a bad "circuit board type electronics" that had loads of cold solder joints, so I took it out and replaced with 4 new 500K Emerson pots and 2 new .022uf caps (orange drop). I checked and re checked all the grounds including the bridge ground. The pups are the original Gibson pups and I followed the Gibson Humbucker wiring diagram, red & white together, green & braided together soldered to the pot chassis, black to lug 3 vol pot and the rest according to the diagram. So why do I still have a bad hum from both pups? Lowering the volume also lowers the hum so it's not a "raw" hum, it's in the pups.

Ideas? Advice?
Don

 

[PFDarkside]

Re: Annoying Hum

They are Gibson pickups? It seems you wired them like Duncans. Here is the chart I reference. Assuming it’s correct, it looks like you wired them as single coils. (Red/White together, Black to hot, Green to ground)

 

[TinPan]

Re: Annoying Hum

They are Gibson pickups? It seems you wired them like Duncans. Here is the chart I reference. Assuming it’s correct, it looks like you wired them as single coils. (Red/White together, Black to hot, Green to ground)

Ok I checked it again and realized something, there is a lot of EMF in my shop, I plugged it back in the amp and moved around the room and the hum goes in & out however even in the spot where it is the least hum there is still a hum. And you are correct I followed the Seymour Duncan 2 humer 2 vol 2 tone diagram. I will look at the ones you posted here. Thanks for the tip

 

[jimilee]

Re: Annoying Hum

You have fluorescent lighting? What about the incoming voltage from the wall? The last place I lived, the power would spike at night and introduced noise. It played hell with my pedal building.


Sent from my iPhone using Tapatalk

 

[TinPan]

Re: Annoying Hum

Fixed! I used this original wiring for the circuit board, neck pup Black bare ground, green white soldered together red is hot, bridge pup green & bare ground, Black & red soldered together and white hot. Now sounds great! Thanks for everyone's input!

 

[67Mopar]

Re: Annoying Hum

My 2015 Less Plus P90 generates a ****-load of hum, but then it's loaded with P90's... I've been thinking about getting rid of the PCB controls, but I'm not sure if this would help quell some of the hum? There's a cool hum-kill system out there, but I don't recall who makes it? It entails loading the cavity with some sort of hum suppressing material. If the guitar didn't sound so awesome as-is, I'd load it with some hum-free Kinman's. I've been using a Tom Scholz designed MXR noise gate that works quite well. Still, it would be cool to lower the hum level.

 

[PFDarkside]

Re: Annoying Hum

Fixed! I used this original wiring for the circuit board, neck pup Black bare ground, green white soldered together red is hot, bridge pup green & bare ground, Black & red soldered together and white hot. Now sounds great! Thanks for everyone's input!View attachment 100724

Great, glad it works!

My 2015 Less Plus P90 generates a ****-load of hum, but then it's loaded with P90's... I've been thinking about getting rid of the PCB controls, but I'm not sure if this would help quell some of the hum? There's a cool hum-kill system out there, but I don't recall who makes it? It entails loading the cavity with some sort of hum suppressing material. If the guitar didn't sound so awesome as-is, I'd load it with some hum-free Kinman's. I've been using a Tom Scholz designed MXR noise gate that works quite well. Still, it would be cool to lower the hum level.

View attachment 100740

The PCB isn’t the source of the hum, it’s the P90s. No amount of shielding, rewiring, etc. will eliminate it. Something like the Ilitch system works.

https://www.ilitchelectronics.com/hum-canceling-systems/lcncs/

 

[67Mopar]

Re: Annoying Hum

Great, glad it works!



The PCB isn’t the source of the hum, it’s the P90s. No amount of shielding, rewiring, etc. will eliminate it. Something like the Ilitch system works.

https://www.ilitchelectronics.com/hum-canceling-systems/lcncs/

That's the one!