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Re: Topband: 4 Square Receiving at 3V8SF

To: topband@contesting.com
Subject: Re: Topband: 4 Square Receiving at 3V8SF
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 2 Mar 2019 09:06:14 -0500
List-post: <mailto:topband@contesting.com>

> The vertical is 130m away from the array center.

Ash, at less than 1 wavelength the TX antenna is still within the
near field and can most certainly impact the receiving array.  The
real questions are how much does it impact the shortened verticals
(pattern impact) and how much noise does it radiate because it is
resonant.

73,

   ... Joe, W4TV


On 2019-03-02 5:56 AM, Ashraf Chaabane wrote:
Clive,

The vertical is 130m away from the array center. I'm presuming this is a good distance to avoid interaction.

73 Ash 3V8SF

------ Original Message ------
From: "Clive GM3POI" <clive@gm3poi.com>
To: "Ashraf Chaabane" <ash.kf5eyy@gmail.com>; topband@contesting.com
Sent: 02/03/2019 11:54:48
Subject: RE: Topband: 4 Square Receiving at 3V8SF

Ash model in also your TX antenna and see whether you need to isolate that
vertical on RX with a relay.  73 Clive GM3POI

-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Ashraf
Chaabane
Sent: 02 March 2019 10:46
To: topband@contesting.com
Subject: Topband: 4 Square Receiving at 3V8SF

Hi guys,

I built a 4 Square Receiving Array for 160m at 3V8SF. I put details in
my website: http://kf5eyy.info/topband.htm
The achieved F/B so far is 20 db and the F/S is 19 db. There is still
room for improvement with better matching of the elements. I'll need
time to do that.

Thanks to Ahmad 3V1B and Majdi 3V1M for helping me setting up of the
elements. Also to K7TJR, W3LPL and W0FLS
for the valuable support.

73 Ash 3V8SF, 3V8SS
www.kf5eyy.info
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