I'm not sure what you are saying. skin depth = (2.6/sqrt(fhz))inches for copper.
So, at 60Hz, skin depth = 0.336 inches. and at 100KHz, skin depth = 0.008 inches. and at 1MHz, skin depth = 0.0026 inches. Are you saying that at 60Hz, because the skin depth is deeper than the coax shield is thick, that current passing through the outside of the shield will induce voltage inside of the shield, and that at say, 100KHz where the skin depth is a little less than the shield thickness, or at 1 MHz, where the skin depth is only a small fraction of the thickness of the shield that it won't? Or something else? -Chuck Harris Bob Camp wrote:
Hi The “coax is an antenna” problem comes in well before you get to DC. Even with no transformer involved, the skin depth of the coax shield gives up well above 60 Hz (and likely well above 100 KHz). If you want to do full isolation over a very wide range you need some combination of shielding and balanced lines. Bob
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