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Re: [TowerTalk] DIR-DE-DIR on a 40m yagi ?

To: towertalk@contesting.com
Subject: Re: [TowerTalk] DIR-DE-DIR on a 40m yagi ?
From: David Gilbert <ab7echo@gmail.com>
Date: Mon, 15 Nov 2021 10:29:49 -0700
List-post: <mailto:towertalk@contesting.com>

I'd have to run it through EZNEC to see what the best spacing is, but the "best" spacing may vary depending upon things like bandwidth versus gain.  I'll assume that you want maximum gain, but I won't be able to run it until later ... my wife just had surgery on the heel of her right foot and I'm playing Candy Striper.

73,
Dave   AB7E



On 11/15/2021 8:43 AM, Mark - N5OT wrote:
Dave,

Is there an optimal element spacing for this design?  I'd run it through the computer except that computer's at home and I'm not.

73 - Mark N5OT


On 11/14/2021 7:36 PM, David Gilbert wrote:


If you want to make a 3 or 2 element array be bidirectional, tune the parasitic elements to the driven frequency.  Don't make it shorter or longer.  You can run that through EZNEC if you don't believe me.

73,
Dave   AB7E

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