Re: Topband: Best Receive Antenna over Sloping Terrain?

[Lee STRAHAN]

   Greetings Topband antenna guys,
 As a manufacturer of shortened vertical element receiving antennas, I have 
been asked the question about sloping ground many times.
It occurred to me one day that I could use Eznec to solve the question. What I 
did was to slope the elements with respect to Eznec zero elevation and made the 
angle of the elements to the ground the same as if the earth under your sloping 
antenna field suddenly went flat and the elements were then leaning. I lean the 
verticals in Eznec to the angle offset of the questionable uneven earth.
   It is not too hard to program these angles into Eznec and then when you view 
the resultant plot you can turn your head or viewing angle so that the plot 
zero elevation is at the slope angle or if you have any vertical elements you 
simply view it at an angle where the vertical portions are vertical in your 
view.
   It is a little hard to describe this but starting with a single vertical 
element should help to understand the process.
  What I found generally was that the patterns of the vertical antennas or 
the take off angles mostly simply followed the rising ground and the pattern 
stayed mostly the same up to a point where the difference in height of the 
verticals was about 1/3 of the height of the element.
   I suspect Eznec could easily be used on other style antennas like Beverages 
or loops, etc. using my technique with Eznec.
  Your results may vary . I have not tried other style antennas except 
shortened verticals. I would be interested in hearing results if someone tries 
this.
Lee   K7TJROR
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Re: Topband: Best Receive Antenna over Sloping Terrain?

[James Wolf]

How long is the slope?   A beverage or a BOG on a slope like that will work
great.   I don't know how it will work if the direction of interest is
toward the top of the slope though. Any comments?

Jim - KR9U

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Bryon
Paul Veal NØAH
Sent: Saturday, September 02, 2017 1:51 PM
To: Ed; topband@contesting.com
Subject: Re: Topband: Best Receive Antenna over Sloping Terrain?

Ed,

My E/W K9AY loop is on a slope and works fb..

Sent with AquaMail for Android
http://www.aqua-mail.com


On September 1, 2017 2:58:09 AM Ed via Topband <topband@contesting.com>
wrote:

> Greetings from Saudi Arabia!  I think a lot about my home QTH in 
> California and how I want to make the most of my antenna potential.
>
> I have an area that I would like to devote to receiving antennas, 
> that's about 150' square feet. Thought about the DXE Active 4 Sq array 
> but they say installing this on Sloping terrain will degrade its 
> performance. In my case, the slope is about 30-35 degrees, so I'm sure
that limits me.
>
> The transmitting antenna area is about 300-400 feet away, which 
> provides adequate isolation from where I want to install a receiving 
> antenna. Trying to figure out what is most suitable.  In addition to 
> 160m, I am also interested in BCB DXing and some the demonstrations 
> viewed on YouTube are quite impressive!
>
> Would really appreciate some input. I can always provide my home 
> address, where the two antenna areas can be seen on Google Maps.
>
> 73,
> Ed NI6S/7Z1ES
> _
> Topband Reflector Archives - http://www.contesting.com/_topband


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Re: Topband: Best Receive Antenna over Sloping Terrain?

[Bryon Paul Veal NØAH]

Ed,

My E/W K9AY loop is on a slope and works fb..

Sent with AquaMail for Android
http://www.aqua-mail.com


On September 1, 2017 2:58:09 AM Ed via Topband  wrote:

> Greetings from Saudi Arabia!  I think a lot about my home QTH in California 
> and how I want to make the most of my antenna potential.
>
> I have an area that I would like to devote to receiving antennas, that's 
> about 150' square feet. Thought about the DXE Active 4 Sq array but they 
> say installing this on Sloping terrain will degrade its performance. In my 
> case, the slope is about 30-35 degrees, so I'm sure that limits me.
>
> The transmitting antenna area is about 300-400 feet away, which provides 
> adequate isolation from where I want to install a receiving antenna. Trying 
> to figure out what is most suitable.  In addition to 160m, I am also 
> interested in BCB DXing and some the demonstrations viewed on YouTube are 
> quite impressive!
>
> Would really appreciate some input. I can always provide my home address, 
> where the two antenna areas can be seen on Google Maps.
>
> 73,
> Ed NI6S/7Z1ES
> _
> Topband Reflector Archives - http://www.contesting.com/_topband


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Re: Topband: Best Receive Antenna over Sloping Terrain?

[Herbert Schoenbohm]

Not really if it is a gentle slope since IMHO the arrival angle of the 
incoming signal will most likely not be bothered.  The slope may 
actually attenuate some ground wave noise in those directions a bit thus 
improving the S/N ratio.




Herb, KV4FZOn 9/1/2017 6:37 AM, Ed wrote:
Yes, Herb. I have considered this, too. But I think I may run into the 
same problem with sloping terrain. Thoughts?


On Sep 1, 2017, at 13:13, Herbert Schoenbohm 
> 
wrote:


Since your space is limited to preclude a bunch of Beverages I would 
highly recommend the SAL-30 which is a shared loop array from Array 
Solutions. This is really a high performance antenna and should give 
you every thing you need.


https://www.arraysolutions.com/as-sal-30

Herb, KV4FZ

On Fri, Sep 1, 2017 at 4:57 AM, Ed via Topband 
> wrote:


Greetings from Saudi Arabia!  I think a lot about my home QTH in
California and how I want to make the most of my antenna potential.

I have an area that I would like to devote to receiving antennas,
that's about 150' square feet. Thought about the DXE Active 4 Sq
array but they say installing this on Sloping terrain will
degrade its performance. In my case, the slope is about 30-35
degrees, so I'm sure that limits me.

The transmitting antenna area is about 300-400 feet away, which
provides adequate isolation from where I want to install a
receiving antenna. Trying to figure out what is most suitable. 
In addition to 160m, I am also interested in BCB DXing and some
the demonstrations viewed on YouTube are quite impressive!

Would really appreciate some input. I can always provide my home
address, where the two antenna areas can be seen on Google Maps.

73,
Ed NI6S/7Z1ES
_
Topband Reflector Archives - http://www.contesting.com/_topband





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Topband: Best Receive Antenna over Sloping Terrain?

[Ed via Topband]

Greetings from Saudi Arabia!  I think a lot about my home QTH in California and 
how I want to make the most of my antenna potential. 

I have an area that I would like to devote to receiving antennas, that's about 
150' square feet. Thought about the DXE Active 4 Sq array but they say 
installing this on Sloping terrain will degrade its performance. In my case, 
the slope is about 30-35 degrees, so I'm sure that limits me. 

The transmitting antenna area is about 300-400 feet away, which provides 
adequate isolation from where I want to install a receiving antenna. Trying to 
figure out what is most suitable.  In addition to 160m, I am also interested in 
BCB DXing and some the demonstrations viewed on YouTube are quite impressive!

Would really appreciate some input. I can always provide my home address, where 
the two antenna areas can be seen on Google Maps. 

73,
Ed NI6S/7Z1ES
_
Topband Reflector Archives - http://www.contesting.com/_topband