Hey everyone,
 
I've got a split Alembic pickup in a 83 Squire p bass and she sounds awesome. The only problem I'm having is when I turn the tone knob all the way I'm lots of hum.
 
I didn't route the body to place the battery. The battery is sitting right under the volume knob with the attached electronics. Aside from me routing for the battery is there something I can wrap the battery in to get rid of the hum?
 
Thanks,
 
Paul

Is the electronics cavity and the underside of the pickguard shielded?

Yes it is.

Is the hum still the same when you use a different cable?

What about sheilding the whole cavity?
I had a similar problem with my old Squier P Bass(same year actually) when I installed P/J set, I routed the cavity larherr to take the battery and cut a hol at the back for easy access.
Shielding the inside did the trick.

I can use any cable and it's still there.
 
Shielding might do it. copper or that spray?
I really didn't want to route the body.
 
Any other ideas?
 
Thanks for the tips.
 
Paul

If you're just doing this one bass, the copper is probably less expensive.