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Date: Tue, 25 Jan 2011 13:48:26 +0100
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org
References: <4D3D95AD.11858.18D895B1@jurgenb2.3sdesign.de>, <233235.14844.qm@web111913.mail.gq1.yahoo.com> <4D3DD4DA.32594.19CF5F9C@jurgenb2.3sdesign.de> <DA1AC5019DE641AC9CE3C6F64077EF07@JimPC>
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Subject: Re: LF: What freq. list can you recommend
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Hello J=FCrgen,

Welcome to the group!
About 16 kHz: Sometimes there appear traces at 16 kHz as well as on 8=20
kHz but these may be signals caused by some alias effects in the=20
soundcard, sampling at 48 or 96 kS/s and/or caused by NAA/24 kHz. I am=20
receiving these traces too, see the lower capture on=20
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html and=
=20
ignore the 600 Hz spaced QRM lines, caused by the Heidelbergs's tram SMPS.=
..

BTW, it would be interesting to see a 0...24 kHz capture of your RX=20
antenna, covering one day.

Further interesting VLF grabbers in wider distance:
http://qsl.net/4x1rf/vlf/vlfgrabber.htm
http://simnet.is/halldorgudmunds/
http://kl7uk.com/VLFAlaska.html

73, Stefan/DK7FC

73, Stefan/DK7FC

Am 24.01.2011 20:50, schrieb James Moritz:
> Dear Jurgen, LF Group,
>
>
> You wrote:
>> - a weak 16,0kHz CW that is slowly being keyed.
> According to the above list that should be from UK, but its level is=20
> too low,
> unles they use low power...>
>
> The info in the VLF utilities listings tends to be rather old - a lot=20
> of the frequencies listed as being allocated are no longer in regular=20
> use. 15.98kHz was the old frequency of Rugby Radio, GBR, which was=20
> decomissioned several years ago. The replacement VLF stations at=20
> Anthorn and Skelton could probably in theory transmit on that=20
> frequency, but in practice they do not...
>
>
> Cheers, Jim Moritz
> 73 de M0BMU