Return-Path: Received: from mtain-md01.r1000.mx.aol.com (mtain-md01.r1000.mx.aol.com [172.29.96.85]) by air-mc05.mail.aol.com (v129.4) with ESMTP id MAILINMC053-a9694c0240ae28e; Sun, 30 May 2010 06:40:46 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-md01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 46D6A38000115; Sun, 30 May 2010 06:40:45 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OIfvv-0006OD-Pk for rs_out_1@blacksheep.org; Sun, 30 May 2010 11:39:55 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OIfvv-0006O4-3m for rsgb_lf_group@blacksheep.org; Sun, 30 May 2010 11:39:55 +0100 Received: from web28102.mail.ukl.yahoo.com ([217.146.182.122]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1OIfvu-0007lg-U8 for rsgb_lf_group@blacksheep.org; Sun, 30 May 2010 11:39:55 +0100 Received: (qmail 62971 invoked by uid 60001); 30 May 2010 10:39:49 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1275215989; bh=qo2tN5T0sYfQKSF+eiZBaPP8TnMMAxdvYq32mpvGJuY=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=RTQ+s1nAaem7jizW12hzi6JQztDi2D8C0DeX7+Gu7JrGWhyCsW3/MxmPd/H3pjMsTenVvJl+4TRRwc4A3/pjRW7e5NLkWc9z992Cz7cV56K1kj0S97wJ2OjYquH2S3PgT3BKgnsLsNQRArZlaxHptyoSOFehkiqB+6UwxkltNlY= 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=RTs2XTN7cdzT2bvNAFRAlksflepkdsA6FZS4yWFuzCQVW5k9awGYUIw8lp7fLMF2Qd/k328iO5vdwll4APpYLnE/e/MI9LsCEFBvzrKaiNj0G6jpIoRoxcWTCv+wUiGVqMNPk/4I5Q99oIwyTxhTNDjUtfjH77+stjc9tw/Idgo=; Message-ID: <168948.62774.qm@web28102.mail.ukl.yahoo.com> X-YMail-OSG: QCt0U2QVM1lY7UfOJOq.M732QO8F2y9RsviKdKWj.eLlC6n MJd.lqTSN8GV12Bto.q0yokwFGg2D4BXv9iClUhvs5deB8Ns.3WhOXsdTmcf aMn9qSg4nqTMsX7FdagPlp7YZv5ZtYqnXS5ntnWB7zOY9IjdeqLo6PlKUBwh G6R3qsYEt4aJH_wh8hbHtStq9BULqSc_Dt9rhqwa.2uWZT0ZYtR8KKPk3ZIA zdjX1E93i3WbcYQfLzJXtkvHWxBNQYrM1 Received: from [86.137.241.65] by web28102.mail.ukl.yahoo.com via HTTP; Sun, 30 May 2010 10:39:48 GMT X-Mailer: YahooMailClassic/11.0.8 YahooMailWebService/0.8.103.269680 Date: Sun, 30 May 2010 10:39:48 +0000 (GMT) From: M0FMT To: rsgb_lf_group@blacksheep.org In-Reply-To: <001701caff80$4d00df40$0401a8c0@xphd97xgq27nyf> MIME-Version: 1.0 DomainKey-Status: good (testing) Subject: Re: LF: Re: Re: VLF SIGS Content-Type: multipart/alternative; boundary="0-2007413907-1275215988=:62774" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE 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-d256.1 ; domain : yahoo.co.uk DKIM : pass x-aol-sid: 3039ac1d60554c0240ad6dfe X-AOL-IP: 193.82.116.20 --0-2007413907-1275215988=:62774 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable 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 --0-2007413907-1275215988=:62774 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
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.NotSpotTelecom.Com your community Telco / ISP.

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

From: mal hamilton <g3kevmal@talktalk.net&g= t;
Subject: LF: Re: Re: VLF SIGS
To: rsgb_lf_group@blacksheep.orgDate: Saturday, 29 May, 2010, 23:43

Jim
The frequencies I quoted have a 750 hz offse= t that is why I said not
calibrated, just a rough reception guide aroun= d 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
option= s available here I just need a beacon on 9 kcs
de mal/g3kev

----= - Original Message -----
From: "James Moritz" <james.moritz@btopenworld.com&= gt;
To: <rsgb_lf_group@blacksheep.org>
Sent: Saturday, May 29, 201= 0 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 wo= uld be another
matter -
> I wouldn't go there ;-)). Most are quit= e 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 per= formance. But the frequencies you list are a long way out, a
> few= hundred hertz low. There is spectrum display at
> http://abelian.org/vlf/sp= ectrum.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 conv= erter 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
>
>
&g= t; ----- 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
>
>
> Do= es anyone else copy these signals? If not forget about VLF.
> g3kev<= BR>>
>   ----- Original Message -----
> = ;  From: mal hamilton
>   To: rsgb
>&= nbsp;  Sent: Saturday, May 29, 2010 5:15 PM
>  &= nbsp;Subject: LF: VLF SIGS
>
>
>   Not ca= librated
>   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 prese= nt
>   No alpha sigs hrd today
>
> &= nbsp; mal/g3kev
>
>
>
>



=20 --0-2007413907-1275215988=:62774--