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Re: [TowerTalk] Current imbalance on 450 ohm Ladder Line

Subject: Re: [TowerTalk] Current imbalance on 450 ohm Ladder Line
From: "Dan Zimmerman N3OX" <>
Date: Thu, 15 Mar 2007 23:27:32 -0400
List-post: <>
>. It should be measuring
> current balance between the two output lines, and this should be only a
> function of the load.

If you have a current imbalance on open wire line, you have common
mode current.  Only in the perfectly balanced case (equal and opposite
currents) is the line operating with differential mode currents only.

I think the meter is fine.  There's more current in one leg than the
other because of common mode current, but it's not the antenna's
fault... the antenna is nice and symmetric (the switching of the
output leads proves that )

The test described in the original post says that the rig and tuner
are not symmetrically sourcing current to the perfectly symmetric


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