I'm in one of those houses from the 70's, but I'm pretty sure its copper wiring (although I don't doubt some don't)
I got a Tripp-Lite TC-1200 for $9 at a local thrift store (figured I could scav it for parts, worst case), put it in before my VAC-1 and it seemed to lower the noisefloor a bit, now, I wouldn't pay whatever $150-$200 Tripp-Lite wants for this thing new, but for $9, amazing upgrade
I got a Tripp-Lite TC-1200 for $9 at a local thrift store (figured I could scav it for parts, worst case), put it in before my VAC-1 and it seemed to lower the noisefloor a bit, now, I wouldn't pay whatever $150-$200 Tripp-Lite wants for this thing new, but for $9, amazing upgrade










