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Message-ID: <005b01c72163$1dd92f00$0300a8c0@lark>
From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <00ba01c7214f$04fa6440$0b01a8c0@server>
Date: Sat, 16 Dec 2006 22:13:15 -0000
MIME-Version: 1.0
Subject: LF: Re: Rx antenna for SAQ
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Status: O

Hi JB if you have an idea about the inductance of the loop try series tuning
it. The ladder-line will supply a little capacitance in parallel. The sound
card input impedance is around 1k but I dont think the difference will
significantly reduce the signal. Because its horizontal it wont be optimum
but it should work OK at those frequencies.

The other option is parallel tune it in the shack and then use a fet
follower so that you dont load the high impedance of the loop. You may have
enough noise around to be able to put the terminals straight into a scope
and swing a big variable. That will show its peaking somewhere but not the
frequency. A general coverage RX will show an increase in noise as you come
to resonance then use fixed caps to chase it down to 17Khz. If you rx doesnt
go that far work out the inductance from the resonance that is on scale and
the calculate the extra capacity to resonate down at 17.2.
Cheers de Alan G3NYK

----- Original Message -----
From: J. B. Weazle McCreath <weazle@hurontel.on.ca>
To: <rsgb_lf_group@blacksheep.org>
Cc: LowFER at LW Cafe <lowfer@lwcafe.net>
Sent: 16 December 2006 20:15
Subject: LF: Rx antenna for SAQ


> Hello Lowfers and LFers,
>
> I've downloaded and installed Johan Bodin's SAQrx software
> which seems to be working OK in my computer.  I'm looking
> for recommendations on what to use for an antenna to try for
> a reception of the SAQ transmissions.
>
> I have a full wave horizontal loop for 160 meters that is fed
> with 450 ohm ladder-line from the shack.  This antenna has
> the most wire of the ones that I've available, so I am hoping
> that I can somehow make use of it on 17 kHz.  Any and all
> suggestions as to how to couple it to the sound card would
> be much appreciated.
>
> 73, J.B., VE3EAR - VE3WZL
> Solar and wind powered
> Lowfer " EAR"  188.830
> EN93dr
>
>
>
>