"Cecil Moore" wrote in message
om...
Tom Donaly wrote:
The skin depth of copper at 60 hertz is supposed to be 8.53mm. That's
too thick to make a practical shield. No wonder they're having problems.

So 60 Hz magnetic fields penetrate shielded coax?
--
73, Cecil http://www.qsl.net/w5dxp

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."

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