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Re: [TowerTalk] TH-7

To: <jim.thom@telus.net>, "'Peter Voelpel'" <dj7ww@t-online.de>
Subject: Re: [TowerTalk] TH-7
From: "Peter Voelpel" <dj7ww@t-online.de>
Date: Fri, 3 Sep 2021 21:58:06 +0200
List-post: <mailto:towertalk@contesting.com>
With that stocking distance on 20m you will be lucky to get 3dB gain.

With 21m distance between 20m antennas you might reach 5.6dB

 

73

Peter

 

  _____  

From: jim.thom jim.thom@telus.net [mailto:jim.thom@telus.net] 
Sent: Freitag, 3. September 2021 21:10
To: Peter Voelpel
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] TH-7

 

   4 x yagis  stacked is only 4db ?   Per the original article, it was a
flame thrower. 

 

Jim   VE7RF

 

On Fri, Sep 3, 2021 at 11:15 AM Peter Voelpel <dj7ww@t-online.de> wrote:

The stacking gain on 20m will be less then 4dB.

73
Peter

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
jim.thom jim.thom@telus.net
Sent: Freitag, 3. September 2021 19:49
To: towertalk@contesting.com
Subject: [TowerTalk] TH-7

Date: Fri, 3 Sep 2021 09:59:46 -0400
From: "Mike Ryan" <mryan001@tampabay.rr.com>
To: <TowerTalk@contesting.com>
Subject: Re: [TowerTalk] TH-7


<There was an op in Texas who mounted 4 of these on a rotating tower. There
<was an article in one of the ham magazines some years ago about it. But it
<was impressive. The TH7 has 5 elements on 10mtrs which soon will be more in

##  It was on the  front  cover of a  CQ magazine, back in the 80's.   He
stacked em at  35-70-105-140'.   With all 4 driven in phase, he was  20 db
louder than another ham, close by, who had just a single  TH-7 up  70'.
I find that hard to believe, but that was what was reported.
The article was entitled.... "TH-28".

Jim   VE7RF
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