On Wed, 14 Jan 2009 13:10:10 -0500, John Harden, D.M.D. wrote:
>On each line there is a DX Engineering ferrite bead where it leaves the
>tower, and where it comes up through the deck for RF shielding, parasitic
>suppression and RF decoupling.
The bead may make you feel better, but that's all its doing. It takes a
resistive impedance on the order of 1K to do anything useful, which
requires a lot of TURNS through a lossy ferrite! The biggest bead has only
inductive impedance of a few tens of ohms at HF.
73,
Jim K9YC
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