"Cecil Moore" wrote in message
et...
Michael Tope wrote:

"Cecil Moore" wrote:
So 60 Hz magnetic fields penetrate shielded coax?

Cecil, if ever I had the feeling that I was about to answer a loaded
question, this is it, but here goes anyway - "Yes, I believe a 60 Hz
magnetic field impinging on a piece of shielded coax would penetrate
the shield of that coax significantly if the shield were made of a
non-ferrous conductor."

It's not a loaded question. I just always assumed that coax
would shield the system from 60 Hz noise and I guess I was
wrong.
--
73, Cecil http://www.qsl.net/w5dxp

Cecil,

Here's a link to an interesting post on TowerTalk by Jim K9YC
discussing the subject of shielding effectiveness of coax at very low
frequencies:

http://lists.contesting.com/_towerta.../msg00663.html

73, Mike, W4EF.............................................. .......