Topband: K9AY-Loop ?

[Jim Brown]

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