Date: August 08, 2008 at 21:48:27 From: Charlie Subject: Re: I think it is for RFI shielding.(NT)
I've got a few old ones(50-60s) with the copper strip also. Mine were from preamps looking for low noise I think. Plus, I used one on a homebrew that I did have to ground the PT to kill the noise but I never really knew why, it took me forever to figure it out.