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Re: Topband: Shunt feed short tower

To: kjones@virtualcohesion.com, topband@contesting.com
Subject: Re: Topband: Shunt feed short tower
From: Earl W Cunningham <k6se@juno.com>
Date: Mon, 5 Jun 2006 21:07:59 -0700
List-post: <mailto:topband@contesting.com>
Kelly's (N0VD) tower is too short to shunt feed on 160m with a gamma
(single capacitor) match, as he's been trying to do unsuccessfully.

The answer for a tower that short is to use an omega (two capacitor)
match.  I suggest a shunt wire tap height of 35 feet or so.

An omega match will tune virtually anything and it is not necessary for
the tower to be resonant at any frequency when using this method.  Just
install the shunt wire and the two variable caps and tune them for lowest
SWR on the desired frequency.

73, de Earl, K6SE
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