Tweaker's Asylum

Posted by Steve Eddy on January 26, 2000 at 21:14:51:

In Reply to: Copper Pipes? posted by Ben Hammer on January 26, 2000 at 20:51:19:

Ben Hammer wrote:

"I'm not sure about this, but that's why I'm here. So here it goes.
Copper blocks EMF's thats why some components have copper(plated)chassis, correct? So if you ran your power cables through a copper pipe behind your components would it be noticable?"

If my "EMF's" you mean the electromagnetic field produced by your power cables, then copper won't help you much in terms of shielding. The electromagnetic field produced by the power cables is H-field (magnetic field) dominant and to shield that, you need some sort of high-permeability material (like muMetal) that can absorb it. Copper is used for RFI, which is largely E-field (electric field) dominant and works largely via reflection (due to the impedance mismatch between the electric field and the copper)rather than absorption.

se

Follow Ups:

• Re: Copper Pipes? Paul Kelly 16:16:35 01/27/00 (1)
  • thanks for the clarification (n/t) Ben Hammer 16:50:19 01/27/00 (0)