Grounding Issue "Brain Teaser"

[DrewB]

This has nothing really to do with your topic but I am going to throw it out there.
I had a historic LP Jr (I sold it and miss it) that had a very very unguitar-like noise when i plugged it in and played- a sort of shrill buzz. Only when I started playing at bedroom levels (see the volume knob could have fixed this CC- like the car radio volume, right?).
I checked all my cords, connections and made sure the tubes were fully seated- and it occurred over and over.
I was vexed greatly.
Anyway- I muscled on.
A few weeks went by and the Jr wasn't getting much love- and I happened to notice one of the latches was open- and I took the guitar out and plugged it in and there was the fricken noise. In a rare moment of intuition I decided to lock the case- and viola' the noise was gone. One of the hasps was rattling against it's base when I played the Jr. No other Gibson case did that.
I really hope you get this solved- it sounds like a good deal of blood, mental energy and jing are going into the fix.
I just ready your last post- I sell electrical wire for a living- it might be induction- try a larger ground wire- with flexible tinned (not bonded- too stiff) stranding.

Years ago, I had my old trombone in its case in the back corner of my guitar room. I would hear this weird sound when I was playing as notes died out through one of my Marshalls. It took a long time to discover it was the trombone case vibrating against the foundation.

 

[Subliminal lanimilbuS]

Please read my last post. If you are getting a high fluctuating reading as you stated from your ground wire to the stud insert it is that ground wire. It should be close to zero and steady.

 

[charliechitlins]

So?
Sorted yet?

 

[foreverstrung]

So?
Sorted yet?

Unfortunatly no. I've done everything discussed here. I even went to another location, but still in this house. Different amp. No change. It is unbelievingly maddening. I've gone as far as ordering a new Les Paul studio. New-used. It arrives tomorrow. I'm going to remove all of the wiring from it. Everything and then replace it all with the wiring I have in the gold top. Switch and all. I'll report my findings then

 

[foreverstrung]

OK. So I wont go into all the rabbit holes I went down after what I've already posted, but it's been discovered that it is a grounding issue with my outlets. Once that was discovered and addressed, my ground hum issue became a non issue.....Now it's not perfectly silent, especially with high gain, but it is much more resonable. In fact, if I lower the gain 50% it's nearly silent now. Very happy now. Thanks everyone for your input.

 

[foreverstrung]

: )

 

[El Gringo]

I have a 31 year old LP Classic that makes this crap noise like described by the OP , except that it occurs all the time no matter if you touch the tailpiece or not ,and any other hardware on it .

 

[sozo]

I used to have a Norlin era LP Standard, every time I played it at volume through a Marshall 50watt Plexi I heard this weird thumping noise. Then I realised it was the neighbors banging on the wall

 

[foreverstrung]

I have a 31 year old LP Classic that makes this crap noise like described by the OP , except that it occurs all the time no matter if you touch the tailpiece or not ,and any other hardware on it .

This sounds like your tailpiece is not grounded. If it was, the noise would stop when you touched it