Message-ID: <00c601c97704$2af566b0$0301a8c0@mal769a60aa920>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <003301c9759e$c21f3f00$0301a8c0@mal769a60aa920> <20090113183625.al3lh1j9nidc40sk@webmail.versatel.de>
Date: Thu, 15 Jan 2009 11:26:52 -0000
MIME-Version: 1.0
Subject: Re: LF: Antenna Diversity
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Tnx Uwe
I must try this method. If u have some info about setting it up let me know 
and what version of speclab
73 mal/g3kev

----- Original Message ----- 
From: <uwe-jannsen@versanet.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, January 13, 2009 5:36 PM
Subject: Re: LF: Antenna Diversity


> Hi Mal,
>
> pse see also
>
> http://home.versanet.de/~uwe-jannsen/two.htm
>
> regards
> Uwe/dj8wx
>
>
>
> Zitat von mal hamilton <g3kevmal@talktalk.net>:
>
>> LF/MF
>> I am experimenting at present with antenna (space diversity) using
>> two loops. Loop A is 40 metres perimeter vertical orientation, Loop B
>> is 190 metres perimeter also vertical.  Both loops optimum E/W.
>> I am using two receivers in this experiment Ant A to Siemens D2155
>> level meter, BW 20 Hz and vy stable, Ant B to Datong up converter and
>> IC746 250 Hz BW. Both audio outputs to soundcard/ARGO display
>> allowing 50 hz separation for observation.
>> Observing DI2AM at present and having calibrared this signal on both
>> RX outputs at a point in time, both signals are fairly constant but
>> more variations have been observed on Ant A - 40m loop, the signal
>> surges in strength and then fades down, whereas Ant B has a more
>> constant output with less fade.
>> More time is needed for a proper assessment and DI2AM is also a
>> strong signal. I would need a few long haul signals for a proper test
>> like Russian or USA .
>> Interested in MF signals at present.
>> This method would also work with a couple of small loops or a loop
>> and probe type antenna, then at a glance one would know how each was
>> performing, of course with the loop in the optimum direction for
>> target signal.
>>
>> This is just a simple setup, it works well and no audio cross mod
>> noticed, nice clean signals on display in spite of the fact that the
>> separation is only 50hz.
>> A nice balanced mixer would be a more sophisticated approach, that
>> might come later.
>>
>> 73 mal/g3kev
>>
>>
>
>
>
>


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