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Re: [TowerTalk] A3 40 meter add-on

To: "Tom Osborne" <>, "Towertalk" <>
Subject: Re: [TowerTalk] A3 40 meter add-on
From: "David Thompson" <>
Reply-to: David Thompson <>
Date: Wed, 14 May 2008 12:51:52 -0400
List-post: <">>
Those 40 meter add on kits require the original beam for the rest of the the
element.  However, there is no reason you can not design an add on kit for
the 20 meter beam.  Start with just the driven element and see how it
performs.  Make sure the elememt tips are strong enough to support the extra
length and the required coil.  Mosley used side support on both sides as I
recall for the TA-36.  The plus is that you will get a 40 meter antenna at
the same height as the 20 beam.

Now as to adding a parasitic element, you may find the spacing is not
correct for either a reflector or a director.  The spacing needs to be 16,
20 , or 24 feet for best results as Hy-Gain, Mosley, and Cushcraft found.

Good luck.

73 Dave K4JRB

----- Original Message ----- 
From: "Tom Osborne" <>
To: "Towertalk" <>
Sent: Wednesday, May 14, 2008 12:15 AM
Subject: [TowerTalk] A3 40 meter add-on

> Soome recent posts made me wonder something--could I put one of those 40
> meter add-on kits on my 20 meter monobander?  I have a  home-brew 2
> jobbie.  73 and thanks
> Tom W7WHY
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