abraxas `prob?`

[tjc]

Hi all,At a recent gig,i put the coil tap on and heard music and a bit of feedback  coming through my amp?
Its coming through the guitar because when I put is back into humbucker mode is silent?
Are these pups wax potted do you know?
Thanks

[Dave Sloven]

I don't think potting is the issue ... that causes feedback between your amp and the pickup

In this case the wiring of your guitar is acting like an aerial, picking up radio transmissions.  You could quite easily pick up police or ambulance radios too.

It must be that it is being cancelled out when you are in humbucking mode.  I would work on shielding the guitar, starting with the control cavity and then the pickup cavity and the undersides of the pickguard (if that forms part of the cavities) and/or the control cavity cover.  Make sure though that the shield is continuous and grounded to the back of a pot so that the charge grounds out into your cable.  Be careful to avoid shielding close to the output jack and put insulating tape between the shielding and the pickups

[tjc]

I don't think potting is the issue ... that causes feedback between your amp and the pickup

In this case the wiring of your guitar is acting like an aerial, picking up radio transmissions.  You could quite easily pick up police or ambulance radios too.

It must be that it is being cancelled out when you are in humbucking mode.  I would work on shielding the guitar, starting with the control cavity and then the pickup cavity and the undersides of the pickguard (if that forms part of the cavities) and/or the control cavity cover.  Make sure though that the shield is continuous and grounded to the back of a pot so that the charge grounds out into your cable.  Be careful to avoid shielding close to the output jack and put insulating tape between the shielding and the pickups

[tjc]

Hey Bud,Ive never had this before in 51 yrs playing? Sounds microphonic and as I said in my post,it did feedback too!!
I play Les Pauls by the way?

[Dave Sloven]

Well what puzzles me about is that it stops when you go back to humbucker mode.

Maybe someone with more experience in splits can weigh in on this one.  I've only used single coils and humbuckers, never split the coils on a humbucker that I've been using in a noisy environment.

Also at 49 I was feeling quite old until I read your last post.  Thanks 

[tjc]

never to old bud,63 and still gigging since 1968!!