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Re: Topband: Comparing antennas was: Re: 160m loaded tower

To: topband@contesting.com
Subject: Re: Topband: Comparing antennas was: Re: 160m loaded tower
From: Pete Smith N4ZR <pete.n4zr@gmail.com>
Date: Wed, 18 Jan 2023 16:26:28 -0500
List-post: <mailto:topband@contesting.com>
I agree entirely - the challenge is to model a tower and two multiband yagis with sufficient fidelity.

73, Pete N4ZR

On 1/18/2023 2:19 PM, James Wolf wrote:
It's quite possible that the addition of a beam at 60 ft. could cause capacity 
hat effect changing the current flow in the tower.  It might be worth modeling 
this.

Jim - KR9U

I have a 100 ft tower with jk mid tri 40 on top. When shunt fed, it
was pretty competitive on 160. Recently the antenna seems to be a few
db weaker. The only change was adding another beam at 60ft. Could it
have had an impact? Adding the beam only marginally affected the match.
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