Return-Path: Received: from mtain-dl05.r1000.mx.aol.com (mtain-dl05.r1000.mx.aol.com [172.29.74.211]) by air-mc06.mail.aol.com (v129.4) with ESMTP id MAILINMC064-a9764d8047a8267; Wed, 16 Mar 2011 01:16:24 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl05.r1000.mx.aol.com (Internet Inbound) with ESMTP id A8D533800008E; Wed, 16 Mar 2011 01:16:22 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Pzj4Q-0003hA-4s for rs_out_1@blacksheep.org; Wed, 16 Mar 2011 05:14:54 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Pzj4P-0003h1-FT for rsgb_lf_group@blacksheep.org; Wed, 16 Mar 2011 05:14:53 +0000 Received: from bay0-omc1-s18.bay0.hotmail.com ([65.54.190.29]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Pzj4O-0003P3-5k for rsgb_lf_group@blacksheep.org; Wed, 16 Mar 2011 05:14:53 +0000 Received: from BAY154-W21 ([65.54.190.61]) by bay0-omc1-s18.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Tue, 15 Mar 2011 22:14:44 -0700 Message-ID: X-Originating-IP: [81.200.63.88] From: Lubos OK2BVG To: _RSGB_LF Date: Wed, 16 Mar 2011 06:14:44 +0100 Importance: Normal MIME-Version: 1.0 X-OriginalArrivalTime: 16 Mar 2011 05:14:44.0279 (UTC) FILETIME=[0FAE8C70:01CBE399] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary="_54e83363-d4c9-4183-802a-da8f0c1b6956_" Subject: LF: OK2BVG_110316 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=FORGED_HOTMAIL_RCVD,HTML_40_50, 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-sid: 3039ac1d4ad34d8047a52db3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --_54e83363-d4c9-4183-802a-da8f0c1b6956_ Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable Hello Markus, Eddie and Roger!Thanks for your remarks on my yesterday=B4s= transmission. The nightime carrier was not me. My Marconi L is used for= beacon OK0EMW overnight. I will continue with transmission today morning.= I will start before 08:00 UT and send "K" two times.=20 INFO: Date: 16.03.2011Time: 07:45 UT - 13:30= UTAntenna: Marconi L 24m up + 220m top load PA: = 25W Ant current: 300 mA Identification: K Mode: DFCW= 3000 FRQ: 8970.040 (+/- some few mHz :-)Shift: = 10mHz=20 =20 73! Lubos From: markusvester@aol.com To: rsgb_lf_group@blacksheep.org Date: Wed, 16 Mar 2011 00:46:18 +0100 Subject: Re: LF: VLF reception - easily mistaken! The OE3GHB grabber shows a long bright=20 line on 8969.98 from 16:00 to 4:30. The sensitivity was not degraded,=20 so perhaps only a local oscillator test. Or a nighttime carrier from OK2BVG? But it looks=20 stronger than the subsequent "KKK" which Lubos sent on 8970.02 / .04 from= =20 6:00 to 15:45. =20 OE5ODL then shows a very bright "riser" from 6:15=20 to 14:15. This was his own transmission, also visible at DK7FC.=20 =20 So probably two different signals, both on=20 8969.98. Could it be that Roger's screenshot has hints of=20 both? =20 Best 73, Markus (DF6NM) From: Roger Lapthorn=20 Sent: Tuesday, March 15, 2011 11:13 PM To: rsgb_lf_group@blacksheep.org ; Eddie ; oe5odl@langwelle.at=20 Subject: LF: VLF reception - easily mistaken! A word of caution to those of us looking for very=20 weak signals around 8-9kHz..... DJ8WX was copied here overnight without=20 any doubt and my grabber was clearly able to see his close-down around 070= 0=20 today. The frequency and the trace timing corresponded perfectly. Likewise= with=20 G3XIZ and DK7FC/P some weeks ago. This evening I was looking very=20 carefully again at the Spectrum Lab screen from the last 24 hours in 424uH= z BW=20 and readjusting audio gain ranges, screen colour saturation and contrast.= Out of=20 the noise appeared another very very faint line, not at 8.970022 but at=20 8.96998kHz. I've attached the screen shot here (I have overlaid it with th= e time=20 for clarity).=20 My immediate reaction was this must be Ossi OE5ODL. Then I=20 checked his grabber and saw he was not operational overnight last night!= So,=20 what looked like a trace on his frequency cannot be him. It must instead= =20 be some artefact of SL or something else. So, Mal is right (did I=20 just say that? :-) ) that we have to be very careful when seeing traces=20 at specific frequencies: it may be an indication of a given station, but= without=20 some modulation or turning on/off of the carrier a doubt remains. Sadly I=20 don't think I did see Ossi today after all, but I shall keep looking. 73s Roger G3XBM --=20 g3xbm-qrp.blogspot.com/ www.g3xbm.co.uk www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL=20 G11088 =3D --_54e83363-d4c9-4183-802a-da8f0c1b6956_ Content-Type: text/html; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable Hello Markus, Eddie and Roger!
Thanks for your remarks on my yesterday= =B4s  transmission. The nightime carrier was not me. My Marconi= L is used for beacon OK0EMW overnight. 
I will continue wi= th transmission today morning. I will start before  08:00 UT and send= "K" two times. 

INFO: 
Date:         = ;       16.03.2011
Antenna:     = ;     Marconi L 24m up + 220m top load 
PA:       &nbs= p;         25W 
Ant current:     300 mA Identification:   K 
Mode:       &= nbsp;     DFCW 3000 
FRQ:             =  8970.040 (+/- some few mHz :-)
Shift:             =  10mHz 


=
   

73!

=
Lubos

From: markusvester@aol.co= m
To: rsgb_lf_group@blacksheep.org
Date: Wed, 16 Mar 2011 00:46:18= +0100
Subject: Re: LF: VLF reception - easily mistaken!

The OE3GHB grabber shows a = long bright=20 line on 8969.98 from 16:00 to 4:30. The sensitivity was not degr= aded,=20 so perhaps only a local oscillator test.
Or a nighttime carrier from OK2BVG?= But it looks=20 stronger than the subsequent "KKK" which Lubos sent on 8970.02 / .04= from=20 6:00 to 15:45.
 
OE5ODL then shows a very bright "rise= r" from 6:15=20 to 14:15. This was his own transmission, also visible at DK7FC.=20
 
So probably two different signals, both on=20 8969.98. Could it be that Roger's screenshot has hints of=20 both?
 
Best 73,
Markus (DF6NM)=

Sent: Tuesday, March 15, 2011 11:13 PM
Subject: LF: VLF reception - easily mistaken!

A word= of caution to those of us looking for very=20 weak signals around 8-9kHz.....

DJ8WX was copied here overnight wit= hout=20 any doubt and my grabber was clearly able to see his close-down around 070= 0=20 today. The frequency and the trace timing corresponded perfectly. Likewise= with=20 G3XIZ and DK7FC/P some weeks ago.

This evening I was looking very= =20 carefully again at the Spectrum Lab screen from the last 24 hours in 424uH= z BW=20 and readjusting audio gain ranges, screen colour saturation and contrast.= Out of=20 the noise appeared another very very faint line, not at 8.970022 but at=20 8.96998kHz. I've attached the screen shot here (I have overlaid it with th= e time=20 for clarity).

My immediate reaction was this must be Ossi OE5ODL.= Then I=20 checked his grabber and saw he was not operational overnight last night!= So,=20 what looked like a trace on his frequency cannot be him. It must in= stead=20 be some artefact of SL or something else.

So, Mal is right= (did I=20 just say that? :-) ) that we have to be very careful when seeing tr= aces=20 at specific frequencies: it may be an indication of a given station, but= without=20 some modulation or turning on/off of the carrier a doubt remains.

S= adly I=20 don't think I did see Ossi today after all, but I shall keep looking.
73s
Roger G3XBM
--
g3xbm-qrp.blogspot.com/
www.g3xbm.co.uk
www.youtube.com= /user/g3xbm
G3= XBM   GQRP 1678    ISWL=20 G11088
=3D --_54e83363-d4c9-4183-802a-da8f0c1b6956_--