Topband: Topband Digest, Vol 117, Issue 47

[Doc Khalsa]

In Phx.  Home tonite.

Been following the screen debate.  Maybe I should run out a rabbit wire 
screen toward
EU?

On 9/26/2012 10:00 AM, topband-request at contesting.com wrote:
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> Today's Topics:
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>     1. Re: Ground Screens - Another Small Space Option (ZR)
>     2. Re: W5UN this morning (Tuesday 25th September) - long
>        pathinto EI? (Lennart M)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 26 Sep 2012 09:29:27 -0400
> From: "ZR" <zr at jeremy.mv.com>
> To: "Paul Christensen" <w9ac at arrl.net>,	<topband at contesting.com>
> Subject: Re: Topband: Ground Screens - Another Small Space Option
> Message-ID: <1BE45301D74240A7A943F879818370FF at computer1>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=response
>
>
>
>>> I've used screens when I needed a wide bandwidth ground system, but never
>> under other conditions.
>>
>> Adding a screen or preferably, additional short radials at the base will
>> assist in stabilizing the resistance component of the vertical radiator
>> and capacitance across the base insulator as ground conditions change due
>> to wx, seasonal ground moisture, etc.  The stabilization effect is
>> probably more important with directional systems than it is for
>> non-directional radiators and is common in AM broadcast systems where an
>> array is sited in a flood plane.
>>
>> Paul, W9AC
>
> A screen will result in much stronger radiated power where it is wanted if
> the antenna of any height is over poor ground.
>
> Carl
> KM1H
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 26 Sep 2012 16:46:19 +0200
> From: "Lennart M" <lennart.michaelsson at telia.com>
> To: "'Cormac Gebruers'" <ei4hq.mail at gmail.com>,
> 	<topband at contesting.com>
> Subject: Re: Topband: W5UN this morning (Tuesday 25th September) -
> 	long	pathinto EI?
> Message-ID: <DF7444465C6546CE9042C3B1F3E1AFCB at lennartDator>
> Content-Type: text/plain;	charset="us-ascii"
>
>   
>
>
> Hi,
>
> I was up early this morning (Tuesday 25th September) and heard W5UN come up
> on 160m at 0444utc. Though very weak and with deep QSB, he was by far and
> away the strongest  on my K9AY when switched NE and next strongest when
> switched SE. I'm in IO51, he is in EM19; direct bearing is 296 degrees
> (WNW), long path is 116 degrees (SSE).
>
> I tried calling (as did a few others) but I think perhaps only SM7BIC worked
> him. I'm not sure though as condx from my perspective were very marginal
> becuase of the deep QSB.
>
> Local sunrise was at 0625utc today
>
> Was he really long path (33428km) or is some other propagation mechanism at
> play here?
>
> GE all,
> Never worked Dave this morning. Dave was on the chat and called me but we
> both had high QRN. Maybe better tmw?
> Anyway good to see increasing activity again.
> 73
> Len SM7BIC
>
>
>
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> ------------------------------
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> End of Topband Digest, Vol 117, Issue 47
> ****************************************
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