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Re: [TowerTalk] VE3GK stacking drawing

Subject: Re: [TowerTalk] VE3GK stacking drawing
From: Jan Erik Holm <>
Date: Tue, 09 Oct 2007 16:19:17 +0200
List-post: <>
Yes agree, lower alone would have been OK. However
this was the only test I did, I can´t switch upper
or lower alone.
I wanted to keep it simple and also retain stacking gain,
runing BIP/BOP IMO seemed the most simple solution.

Peter Voelpel wrote:
> Yes, you will have a hole around 20° with the stack, but that would be very
Yes I figured I was at a null.
> well covered with the lower antenna alone up to 24°.
> Setting the stack antiphase will have the maximum lobe at about 24°.
> Are you sure that higher take off angles then 17° are needed for east cost
> traffic?
No, probably not.
> At that angle the single low yagi is still better then the antiphase stack.
> 73
> Peter
73 Jim SM2EKM

> -----Original Message-----
> From:
> [] On Behalf Of Jan Erik Holm
> Sent: Dienstag, 9. Oktober 2007 08:40
> Cc:
> Subject: Re: [TowerTalk] VE3GK stacking drawing
> Yes very much needed, depending on antenna heights ofcourse.
> Forexample, I once had a 5/5 20m stack at 100/47 ft then it wasn´t needed.
> My current 20m 5/5 stack is at 130/65 ft and I couldn´t be without it. One
> example, during sun spot maximum if 5/5 Yagis BIP it could be 15 dB down
> compared to a 4 el Yagi at 70ft (on east coast USA) then when flipping to
> BOP it could be 5 dB better at least.
> 73 Jim SM2EKM
> PS: I remember VE3GK, it was a good fellow and a big signal.


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