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Re: [TenTec] Detecting unbalanced feed line currents

To: tentec@contesting.com
Subject: Re: [TenTec] Detecting unbalanced feed line currents
From: Stuart Rohre <rohre@arlut.utexas.edu>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 10 Jul 2013 15:19:44 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
With the line isolator(s), feed point balun, tight shield coax, etc., etc. You may not have much RF appearing on the Windom's coax at the shack. If you did, you might notice RF feedback in the radio's audio; or a hot shield in extreme cases somewhere along the line.

A few turns of hook up insulated wire connected to a Ma meter, and a sensitive milliameter with a germanium diode across the meter terminals, should be able to detect if you have outside the shield current, as you slide the meter along the coax, with coax inside the coil turns.

Also, as stated in my previous post, if you have unbalanced currents in your antenna legs, you may notice a slight directional response toward one end of the antenna than the other. If you are not observing any symptoms don't worry, your antenna is working as well as it can.

Stuart Rohre
K5KVH
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