[TowerTalk] VE3GK stacking drawing

[Jan Erik Holm]

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: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Jan Erik Holm
> Sent: Dienstag, 9. Oktober 2007 08:40
> Cc: TOWERTALK at contesting.com
> 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.