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Re: LF: LF-antenna with top load

from [Mike Dennison] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: LF-antenna with top load
From: "Mike Dennison" <[email protected]>
Date: Thu, 16 Sep 1999 11:22:38 +0100
In-reply-to: <000d01beff9e$9ff064c0$3596b38f@w8k3f0>
Organization: Radio Society of Great Britain
Reply-to: [email protected]
Sender: <[email protected]> 
PA0SE wrote:

As there has been some discussion on the merits of different kinds of top
loading I have performed some computer simulation, using the Antenna
Optimizer program by Brian Beezley, K6STI, which is similar to EZNEC.




1. No top load
Efficiency: 10.8%



2. One horizontal top load wire of 5 m

 Efficiency: 12.5%





4. One horizontal top loading wire of 10 m

Efficiency: 11.9%


6. One horizontal top loading wire of 20 m
Efficiency: 10.0%



Dick,
There's something wrong here isn't there?. You have a reducing efficiency for increasing top load length. Surely that can't be right. 



Mike, G3XDV (IO91VT)
http://www.dennison.demon.co.uk/activity.htm
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