It's a tight fit as-is, so that would mean boring the hole out some more which is already pretty big. A little nervous about that.stratamania said:They probably recommended it to prevent a possibility of shorting where the jack is. Though you could shield it and then insulate the shielding to prevent any shorting.
The good ol' US of A. More specifically in New England, in a small town a few hours from Boston. This means wicked old infrastructure, seemingly upgraded ONLY to meet the bare minimum of industry requirements. Let's just say I sure as hell don't drink the water. I get it delivered. But this means a lot of of homes have electrical wiring which, while safe and legal, isn't the cleanest power you've ever played with.TBurst Std said:Crosscheck, which country do you live in?
I just want to make sure I'm on the same page here as the rest of you. Given the facts that EMG has tested all my gear on their bench and found no noise, and that I have played out in places that produce less noise than at my home, is it still worth testing my existing gear for faults or replacing parts? I'm not nay-saying anyone, I'm just trying to better understand.Logrinn said:I would also like to add what’s been said before - ground loop.
If EMG doesn’t recommend grounding/shielding you have with the copper foil in essence created what could be a secondary grounding.
I would check this. Before you rip out the copper you could perhaps just remove the pots from the cavity and have them (and the output jack) dangling in the air and try it like that. If the problem disappears, well that’s good, and if it doesn’t at least you haven’t ripped out the copper foil in vain/error.
Could be worth a try.
As for the ground loop theory, some posters have theorized EMI, as I've already tested (some) ground issues, and one user even said I'm essentially using the correct fix for the wrong problem.
I admit it's a vicious cycle; my bass gets noise that others don't, but my bass plays fine at some locations outside my home, so the assumed problem is greater sensitivity and the assumed goal is to provide some fort of EMI protections, which can mean replacing components...replace what I have? Protect what I have? Is that you John Wayne? Is this me?
We tried that approach alreadyrick2 said:Alright ... it's unlikely, but EMG could be wrong. I'd start by getting rid of all that shielding. You don't need that with EMG's and as Logrinn said, it could be the culprit.
I had to read this a few times. Even though I'm a tech guy, I'm a legit noob in the context of guitar and bass electronics. So this is a new one for my understanding. After some posters helped me (I think) rule out ground, here you're saying that grounding could cause the EMI itself. Get me some aspirin. Is it possible, with all the ground/non-ground testing I've done under the guidance of EMG and luthiers who have opened up my bass, could it still be worth testing by pulling any remaining ground connectors off the pots? My number one concern is that I don't want to fry anything.Mayfly said:Hmmmm - if you really do have secondary grounds wired in there, by accident or design, then yea that could contribute. Might be easier to pull the ground leads off of the electronics one by one and see what happens than to pull the electronics out of the bass, but either will work...
Usually ground loops get noisy when your power is generated by something other than a battery (that is, plugged into a 50/60Hz wall outlet). In usual hum cases, two pieces of equipment end up at different ground potentials because of those 50/60 current pulses they are dumping into their chassis grounds. If you complete the loop, by connecting the same audio cable to both, then 50/60Hz current flows in the grounds of your sensitive parts of the circuit, creating the hum. In your case though, it could be that if you've got a loop in your bass then the loop itself is acting as an antenna and picking up the EMI hash, then happily transferring it to the grounds of your sensitive electronics.
Solution: break the loop- if ya got one.