Message-ID: <020801cb1bc7$67d957d0$0201a8c0@Clemens04>
From: "Clemens  Paul" <cpaul@gmx.net>
To: <rsgb_lf_group@blacksheep.org>
References: <COL122-W48BF49A60927B089AE423CD3B00@phx.gbl> <4C305875.8010902@legal-medicine.de> <4C3062A2.5000701@usa.net> <4C307F08.3090903@legal-medicine.de> <4C30A525.8070302@usa.net> <op.vfb9msqqyzqh0k@pc1>
Date: Mon, 5 Jul 2010 00:22:33 +0200
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Subject: LF: Re: SAQ
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Hi Roelof,

thank you  for sharing your SAQ reception with us.
It's a very good benchmark for comparisons and Perseus
is a great tool to make such file sharing possible.
My Miniwhip is only 30cm above the lawn and the SNR of the 0900=20
transmission
was about the same as at your location,signal strength 6dB less (S8).

Hint for all (potential) Miniwhip users:
Check the DC of your power supply,even if it's linear regulated.
Mine, a cheap one from Reichelt.de with a DC-DC converter for=20
switchable voltages
from 3V to 12V had differential mode spikes on the DC rail which=20
caused
a lot of noise.
And do earth the coax at or near the whip as suggested by Roelof.
These were the two noise sources I had to fight against before the=20
whip performed
as expected.

73
Clemens
DL4RAJ


----- Original Message -----=20
From: "Roelof Bakker" <roelof@ndb.demon.nl>
To: <rsgb_lf_group@blacksheep.org>
Sent: Sunday, July 04, 2010 11:50 PM
Subject: LF: SAQ


> Hello all,
>
> The 09:00 UTC transmission was received very well in the south=20
> western
> part of the Netherlands.
> Easy aural copy in a 500 Hz bandwidth and the "back wave" on key up=
=20
> could
> be heard as well.
> It is about 20 dB weaker than the signal on key down.
>
> I have made a 0-100 kHz PERSEUS recording of the complete=20
> transmission,
> split up in 1 minute files of 42.9 MB.
> These can be downloaded from my webspace:
>
> http://www.ndb.demon.nl/SAQ/
>
> This is not only of interest for PERSEUS owners, but also for those=
=20
> who
> use Alberto di Beni's excellent WinRAD.
> If you don't have it, you can download version v1.33 here:
>
> http://www.weaksignals.com/
>
> After installing WinRad, click on ShowOptions, then Mode and select=
=20
> I
> (Left) / Q(Right).
>
> Click once more on ShowOptions, then Select Input and select WAV=20
> file...
>
> You can now browse to the location on your hard drive where the=20
> PERSEUS
> file(s) have been stored.
>
> Start playback by clicking on the green play back arrow.
> Then select CW and set Tune to 17.200 and you are in business.
> I have to click on the RBW knop to get the ruler displaying the=20
> right
> frequency.
> The setting of RBW does change the frequency resolution of the=20
> displays.
>
> When you have heard SAQ, you can also look at other stations up to=
=20
> 100 kHz
> as received at my QTH.
>
> The antenna is a mini-whip, mounted 5 metre up the stem of a=20
> magnolia tree.
> Effective capture area is 30 x 40 mm.
>
> Best regards,
> Roelof
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D
> From: Roelof Bakker, pa0rdt
> Location: Middelburg, Zealand SW Netherlands, 51 30 02 N, 03 36 02=
 E
> Locator: JO11tm
>
> Receiver:
> PERSEUS DIRECT SAMPLING SDR, Bandwidth 10 Hz
>
> Aerial: pa0rdt-mini-whip, 5 metre up a magnolia tree, main antenna
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D


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----------



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