A shield over a ground wire will change the resonant frequency of the
wire. (More change if you have a dielectric in between.) Depending upon
what your problem frequencies are, you may make matters better or worse.
Jerry, K4SAV
Jim Brown wrote:
>Yes, but as frequency increases, this technique begins to fall apart,
>thanks to the capacitance between the shield and the interior
>conductor.
>
>Jim K9YC
>
>--Original Message Text---
>From: Peter Chadwick
>Date: Mon, 1 May 2006 14:55:37 +0200 (CEST)
>
>
>
>Noise pick up on long ground leads can be reduced by shielding them.
>This is a well known technique in professional EMC (and electronic
>security - TEMPEST) circles. The shield is connected to ground and
>inner at the ground point: the 'top' end has the shield floating..
>
>73
>
>Peter G3RZP
>
>
>
>
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