What you are attempting to make with the copper lining is some sort of Faraday cage to shield out RF and other electrical interference. A conducting mesh or a set of solid conducting walls for a box surrounding your equipment (eg pickups, wiring and switches) will create a zone inside which is relatively immune to extraneous EM radiation.meeks wrote:I'm sorry, I'm not getting this..the copper is shielding from outside interference? Why copper, just to satisfy my own curiosity?
The better the conduction around the cage, the better the shield - gold and silver are excellent conductors too - you could go with them instead if you prefer