Return-Path: Received: from mtain-mc06.r1000.mx.aol.com (mtain-mc06.r1000.mx.aol.com [172.29.96.78]) by air-mf03.mail.aol.com (v129.4) with ESMTP id MAILINMF034-8be44c03ab3c355; Mon, 31 May 2010 08:27:41 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mc06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 279ED3800017F; Mon, 31 May 2010 08:27:39 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OJ44Q-0001IV-T5 for rs_out_1@blacksheep.org; Mon, 31 May 2010 13:26:18 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OJ44Q-0001IM-6D for rsgb_lf_group@blacksheep.org; Mon, 31 May 2010 13:26:18 +0100 Received: from web28107.mail.ukl.yahoo.com ([217.146.182.127]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1OJ44P-0003tw-Lk for rsgb_lf_group@blacksheep.org; Mon, 31 May 2010 13:26:18 +0100 Received: (qmail 51510 invoked by uid 60001); 31 May 2010 12:26:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1275308771; bh=GsinZFrPfa6LjZKGKe7eq/C+Vfu6d5MDOe6kiYyiImY=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=LCz9iDId3yx4GIOgqD0e6zxiynSIWEW537AndrjqZYHAiG6GtoQbycEbsMS4YrtmNhdZ4SPJtleoq3oYIjmD3MzsMnZVchYAZrrYxzFtKc+naTbAes9rt36CuuY3AEvEsGCb/kTqs+ttsVO7/aqVP3eVdxw1NkwEsXOaJYGlkKg= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=n5POLYalihZ70n+l84YcEU0OWxpLKX+WFDFIswUflXFDVRRq54g3ivbW4mrSKgA6FrhFaebPQA2eh+MkWeTe71yOw4ZbqwgJZIUTZ6sAnyHU0mgHgY3vLpNZfOfw3U0uUtwB2imG1ffRisAk87oJ7t45GZf2oyXBrj+eXD/7CKM=; Message-ID: <345993.44714.qm@web28107.mail.ukl.yahoo.com> X-YMail-OSG: D3H6eo4VM1khF2.eDevxTbxyO_FH_GA5LnAYb5TRpMQ1RFt 9FOhPuYXLl9KGD5Mhi2jX8wCZ2z406hhT48kjZBLkIL4wB9nOB1tFUdLENBE BOO7dnQj_yzXTT3KY.pRWt2t4rAURgMpHy3FRlFJmnITBCLo5DDYlg4R6Aqq bc6fyhl2jGEKtBAPOeEzuJRp3PfGb78zv75ZcRUaMoi6hDOWrBoGQqP_yoZ9 kfNQA5SeorcXLpxVxGEBrZvfILmWXihHXiSh_EsIQTv.GhKOLWcyHY4duUDH iD1ngoSihoD4_DWJqg0hKA_TZ7c1F Received: from [86.149.154.195] by web28107.mail.ukl.yahoo.com via HTTP; Mon, 31 May 2010 05:26:11 PDT X-Mailer: YahooMailClassic/11.0.8 YahooMailWebService/0.8.103.269680 Date: Mon, 31 May 2010 05:26:11 -0700 (PDT) From: M0FMT To: rsgb_lf_group@blacksheep.org In-Reply-To: MIME-Version: 1.0 DomainKey-Status: good (testing) Subject: Re: LF: Re: Re: VLF SIGS Content-Type: multipart/alternative; boundary="0-715256119-1275308771=:44714" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d308.1 ; domain : yahoo.co.uk DKIM : pass x-aol-sid: 3039ac1d604e4c03ab3b479e X-AOL-IP: 193.82.116.20 --0-715256119-1275308771=:44714 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable =A0 Hi Roger it's off topic to LF had knuckles wrapped by Reflector Policemen. 73 es GL petefmt I support www.NotSpotTelecom.Com your community Telco / ISP. --- On Sun, 30/5/10, Roger Lapthorn wrote: From: Roger Lapthorn Subject: Re: LF: Re: Re: VLF SIGS To: rsgb_lf_group@blacksheep.org Date: Sunday, 30 May, 2010, 17:47 What power, antenna and matching for the 1km with the sig gen TX Pete? 73s Roger G3XBM On 30 May 2010 11:39, M0FMT wrote: Hi All =A0 Simply use your PC sound card as an RX with the very good SDR application= from Alberto Winrad. Stuff your antenna into the mic socket. Preferably= with a couple of fast recovery diodes back to back to limit the spikes fr= om static build up. Don't recommend it when lightning is about. Never lost= a sound card yet ..... to stall the knockers............ =A0 If you have a modern PC it will have a Hi Def card giving a band width of= 196kc/s if you set the LO on the sdr application to 0.000.000 the readout= will direct in kc/s. Set you input in the drop down menu to either left= or right hand channel or better still both channels added and the display= will start at zero Hz or kc/s. The play on at about 19kc/s you see large= humps of signals extending up to about 23 or so kc/s these are Mil transm= issions and the like. They un-decryptable by the average punter but they= come and go. The Alphas are interesting as the operate up to about 10kc/s= from memory and are short pulses with one second intervals roughly =A0 17.2 kc/s is worth moitoring because this is the frequency on which SAQ Gr= imeton Sweden operates in plain language CW (Google it). It is a motor gen= erator set that produces the 17.2kc/s signal no valves or sparks just a 20= 0kw high frequency alternator fed into a massive antenna system.=A0It come= s on when advertised usually Christmas Eve and other time during the year= Lars will e-mail you the schedual if you ask him. =A0 Very receivable with the set up descibed above with a short piece of wire= as an antenna. Very long wires can be self defeating. =A0 Oh my best dx from my home 8.9kc/s setup ... a sign genny into the antenna= is about 1km using above set up. Have tried a tuned circuit in front of= the sound card 600mm diam air cored joby with little improvement. =A0 Good luck to all who try out VLF RX. 73 es GL petefmt I support www.NotSpotTelecom.Com your community Telco / ISP. --- On Sat, 29/5/10, mal hamilton wrote: From: mal hamilton Subject: LF: Re: Re: VLF SIGS To: rsgb_lf_group@blacksheep.org Date: Saturday, 29 May, 2010, 23:43 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" To: 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 octa= ve > 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 int= o 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" > To: > 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 > >=A0=A0=A0----- Original Message ----- >=A0=A0=A0From: mal hamilton >=A0=A0=A0To: rsgb >=A0=A0=A0Sent: Saturday, May 29, 2010 5:15 PM >=A0=A0=A0Subject: LF: VLF SIGS > > >=A0=A0=A0Not calibrated >=A0=A0=A016.2, 18.1, 19.4, 20.1, 20.7, 21.8, 23.1, 23.8 Khz >=A0=A0=A0All the above freqs active rtty type sigs and strong. >=A0=A0=A0nil hrd below 16.2 Khz at present >=A0=A0=A0No alpha sigs hrd today > >=A0=A0=A0mal/g3kev > > > > --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088 =20 --0-715256119-1275308771=:44714 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
 
Hi Roger it's off topic to LF had knuckles wrapped by Reflector Polic= emen.

73 es GL petefmt

I support www.NotSpotTelecom.Com your= community Telco / ISP.

--- On Sun, 30/5/10, Roger Lapthorn &= lt;rogerlapthorn@gmail.com> wrote:

From: Roger Lapthorn <rogerlapthorn@gmail.c= om>
Subject: Re: LF: Re: Re: VLF SIGS
To: rsgb_lf_group@blackshee= p.org
Date: Sunday, 30 May, 2010, 17:47

What power, antenna and matching for the 1km with= the sig gen TX Pete?

73s
Roger G3XBM

On 30 May 2010 11:39, M0FMT <<= A href=3D"http://uk.mc281.mail.yahoo.com/mc/compose?to=3Dm0fmt@yahoo.co.uk= " rel=3Dnofollow target=3D_blank ymailto=3D"mailto:m0fmt@yahoo.co.uk">m0fm= t@yahoo.co.uk> wrote:
Hi All
 
Simply use your PC sound card as an RX with the very good SDR application from Alberto Winrad. Stuff your antenna into the mic soc= ket. Preferably with a couple of fast recovery diodes back to back to limi= t the spikes from static build up. Don't recommend it when lightning is ab= out. Never lost a sound card yet ..... to stall the knockers............
 
If you have a modern PC it will have a Hi Def card givin= g a band width of 196kc/s if you set the LO on the sdr application to 0.00= 0.000 the readout will direct in kc/s. Set you input in the drop down menu= to either left or right hand channel or better still both channels added= and the display will start at zero Hz or kc/s. The play on at about 19kc/= s you see large humps of signals extending up to about 23 or so kc/s these= are Mil transmissions and the like. They un-decryptable by= the average punter but they come and go. The Alphas are interesting as th= e operate up to about 10kc/s from memory and are short pulses with one sec= ond intervals roughly
 
17.2 kc/s is worth moitoring because this is the frequency on which= SAQ Grimeton Sweden operates in plain language CW (Google it). It is a mo= tor generator set that produces the 17.2kc/s signal no valves or sparks ju= st a 200kw high frequency alternator fed into a massive antenna system.&nb= sp;It comes on when advertised usually Christmas Eve and other time during= the year Lars will e-mail you the schedual if you ask him.
 
Very receivable with the set up descibed above with a short piece of= wire as an antenna. Very long wires can be self defeating.
 
Oh my best dx from my home 8.9kc/s setup ... a sign genny into the an= tenna is about 1km using above set up. Have tried a tuned circuit in front= of the sound card 600mm diam air cored joby with little improvement.
 
Good luck to all who try out VLF RX.


73 es GL petefmt

I support www.NotSpotTelec= om.Com your community Telco / ISP.

--- On Sat, 29/5/10, mal hamilton <g3kevmal@= talktalk.net> wrote:

From: mal hamilton <g3kevmal@talktalk.net&= gt;
Subject: LF: Re: Re: VLF SIGS

To: rsgb_lf_group@blacksheep.org
Date: Saturday, 29 May, 2010, 23:43


Jim
The frequencies I quoted have a 750 hz offset that is why I sa= id not
calibrated, just a rough reception guide around the frequency ar= ea of
interest.
The signals are all very loud with me. I can accurat= ely calibrate when
necessary.
Not sure if it is a good idea to conne= ct 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


&g= t; 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 th= ere ;-)). Most are quite strong, and in a different octave
> of the= spectrum from amateur activity, so not really a good receive
> perf= ormance check - rather like using BBC R4 on 198kHz as a test for
136kHz=
> reception performance. But the frequencies you list are a long wa= y out, a
> few hundred hertz low. There is spectrum display at
&g= t; 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 th= e signals direct into
a
> PC sound card - frequency errors will= be much smaller, and if you are
using
> a reasonably large anten= na, you probably won't even need a preamp.
>
> Cheers, Jim Mor= itz
> 73 de M0BMU
>
>
> ----- Original Message ---= --
> From: "mal hamilton" <= g3kevmal@talktalk.net>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Saturd= ay, 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 -----
>   F= rom: mal hamilton
>   To: rsgb
>  &nb= sp;Sent: Saturday, May 29, 2010 5:15 PM
>   Subject:= LF: VLF SIGS
>
>
>   Not calibrated
&= gt;   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 stron= g.
>   nil hrd below 16.2 Khz at present
> = ;  No alpha sigs hrd today
>
>   mal/= g3kev
>
>
>
>






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http://www.g3xbm.co.ukhttp://www.youtube.com/user/g3xbm
G3XBM    GQRP 1678=      ISWL G11088
<= br> =20 --0-715256119-1275308771=:44714--