Message-ID: <001701caff80$4d00df40$0401a8c0@xphd97xgq27nyf>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <002801caff4a$19054900$0401a8c0@xphd97xgq27nyf> <005301caff5d$3092d110$0401a8c0@xphd97xgq27nyf> <D60DC081CFC04749A0A40BAF48AC5BF5@JimPC>
Date: Sat, 29 May 2010 23:43:03 +0100
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Subject: LF: Re: Re: VLF SIGS
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Jim
The frequencies I quoted have a 750 hz offset that is why I said not
calibrated, just a rough reception guide around the frequency area of
interest.
The signals are all very loud with me. I can accurately calibrate when
necessary.
Not sure if it is a good idea to connect my antennas directly to the
soundcard, maybe via an attenuator for front end control. I also have a W &
G 220 hz - 20 khz RX which is very sensitive but wideband and would be a
better approach if I feed this into the sound card. I have a number of
options available here I just need a beacon on 9 kcs
de mal/g3kev

----- Original Message -----
From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Saturday, May 29, 2010 8:35 PM
Subject: LF: Re: VLF SIGS


> Dear Mal, LF Group,
>
> Everyone can receive those signals in the UK, even with fairly poor
> receiving conditions (actually copying the traffic would be another
matter -
> I wouldn't go there ;-)). Most are quite strong, and in a different octave
> of the spectrum from amateur activity, so not really a good receive
> performance check - rather like using BBC R4 on 198kHz as a test for
136kHz
> reception performance. But the frequencies you list are a long way out, a
> few hundred hertz low. There is spectrum display at
> http://abelian.org/vlf/spectrum.shtml with station IDs and accurate
> frequency calibration. Bear in mind that you do need to be able to set the
> RX frequency within a hertz or less, and have much less drift than that,
for
> the kind of DX tests that have been done recently. Better in that case to
> dispense with the converter and RX, and just feed the signals direct into
a
> PC sound card - frequency errors will be much smaller, and if you are
using
> a reasonably large antenna, you probably won't even need a preamp.
>
> Cheers, Jim Moritz
> 73 de M0BMU
>
>
> ----- Original Message -----
> From: "mal hamilton" <g3kevmal@talktalk.net>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Saturday, May 29, 2010 7:31 PM
> Subject: LF: Re: VLF SIGS
>
>
> Does anyone else copy these signals? If not forget about VLF.
> g3kev
>
>   ----- Original Message -----
>   From: mal hamilton
>   To: rsgb
>   Sent: Saturday, May 29, 2010 5:15 PM
>   Subject: LF: VLF SIGS
>
>
>   Not calibrated
>   16.2, 18.1, 19.4, 20.1, 20.7, 21.8, 23.1, 23.8 Khz
>   All the above freqs active rtty type sigs and strong.
>   nil hrd below 16.2 Khz at present
>   No alpha sigs hrd today
>
>   mal/g3kev
>
>
>
>