Grounding issue Epi SG bass

[thisonegoestoeleven]

Hey all-
Just received a used SG bass and has nasty hum. Looks like someone glued the bridge ferrules into the body holes and am thinking this somehow negated the contact point(smothered in goop?)
Does anyone have a DIY solution to getting that ferrule out of the body so wire can be re-grounded?

 

[Matt Liebenau]

I’d use a multimeter and check for continuity from the bridge to the outside, threaded, part of the output jack. You could also use a wire with alligator clips to connect from the bridge to the output jack and see if that solves the issue.

If the ferrule needs to be removed start with a soldering gun or iron to loosen the glue up. Use the iron down in the threaded part of the ferrule. Once it’s heated up you could screw in the bridge insert and carefully pull straight up on it. The better option would be to protect the body around the ferrule, heat it up, get a short piece of PVC or similar tubing that’s slightly larger inside then the ferrule and place the tubing over it. Then with a washer on the threaded bridge pin slowly screw it into the ferrule and that will pull the ferrule out of the body. It wouldn’t hurt to take an Xacto knife or razor blade and score around the ferrule before you start all this to help prevent finish damage. I think I have some pictures of that process if it will help.

 

[thisonegoestoeleven]

Thank you. Had a total mental block on how to soften the adhesive.

 

[Matt Liebenau]

Happy to help. Keep us posted on how it works out.

 

[thisonegoestoeleven]

Will do

 

[Drredplate]

If I remember correctly the ground wire goes into the bridge ferrule so I suspect your diagnosis is correct. As previously mentioned check the continuity and extract ferrule as also previously described.

 

[thisonegoestoeleven]

I will. Had to order a multi meter and solder kit. Moved and can't find anything

 

[Stempelloos]

We used to hear loud cockpit voices through the amps when we were having a break in our practicing space.
It happened the odd time, but not only in 1 practicing space.
There was another practicing space with different amps where it also occurred.
It could have been the fire brigade or the police there.
(It was in a former monastery, but I guess that has nothing to do with it)
So I assume it's in one of the instruments, not in the amp.
I suspect an Epiphone Genesis guitar.