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Re: [TowerTalk] 4 square for 80

To: towertalk@contesting.com
Subject: Re: [TowerTalk] 4 square for 80
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Fri, 27 Jan 2017 14:32:36 -0800
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On Fri,1/27/2017 1:20 PM, N2TK, Tony wrote:
Besides having beads at the feedpoints do I gain anything by putting beads a 
the Comtek box? Noticeable improvement?

A string of #31 or #43 beads is next to useless at HF. Study k9yc.com/RFI-Ham.pdf and see the "Cookbook" for recommendations of chokes that DO work.

The purpose of a choke is to kill common mode current on the cable(s) on which they are applied. That would, for example, prevent feedlines from acting as radials, which could unbalance currents on the radials. It would also prevent noise pickup on those feedlines.

73, Jim K9YC


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