Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me04.r1000.mx.aol.com (Internet Inbound) with ESMTP id D3A80380003F1; Wed, 28 Mar 2012 06:27:45 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SCq5Y-0002sV-MF for rs_out_1@blacksheep.org; Wed, 28 Mar 2012 11:26:48 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SCq5Y-0002sM-3o for rsgb_lf_group@blacksheep.org; Wed, 28 Mar 2012 11:26:48 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SCq5W-00037z-51 for rsgb_lf_group@blacksheep.org; Wed, 28 Mar 2012 11:26:48 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id q2SAQisE019859 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 28 Mar 2012 12:26:45 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id q2SAQime011736 for ; Wed, 28 Mar 2012 12:26:44 +0200 Message-ID: <4F72E74B.8010300@iup.uni-heidelberg.de> Date: Wed, 28 Mar 2012 12:26:19 +0200 From: =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <8CEDA76E04F70F0-1B04-5AAF@webmail-d082.sysops.aol.com> <8CEDAC636CB654A-A18-4C57@webmail-d159.sysops.aol.com> <4F72B8EB.5060402@dsl.pipex.com> In-Reply-To: <4F72B8EB.5060402@dsl.pipex.com> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: VLF: DF6NM on 8970.002 Content-Type: multipart/alternative; boundary="------------090405090907070205070701" 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_FONTCOLOR_UNKNOWN,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-SCORE: 0:2:505426784:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d608c4f72e7a04a25 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------090405090907070205070701 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id q2SAQisE019859 Hi Markus, Nice work! I can see you in 424 uHz, and traces in 4.5 mHz. You leave a=20 strong trace in 47 uHz, at exactly 8970.0020 Hz! Very nice. I can see QSB on your signal in that 174 km distance. What is the ERP? Go on! :-) 73, Stefan/DK7FC http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html PS: Lubos, really an excellent Grabber!! Am 28.03.2012 09:08, schrieb Chris Dillon: > Hi Markus > Good signals here too in 424uHz and 125uHz (peaking 10dB over the=20 > noise) alongside Henny and Uwe. > Nice to see VLF busy! > > 73 Chris G3WCD > > > On 28/03/2012 07:50, Markus Vester wrote: >> The carrier was on air continuously from 20:26 to 6:36 this morning. >> Thanks very much to Lubos, as well as to all other live grabber=20 >> operators. As far as I can see, traces appeared at DK7FC, G3ZJO,=20 >> OK2BVG, and Paul Nicholson. >> Best 73, >> Markus >> -----Urspr=C3=BCngliche Mitteilung----- >> Von: Lubos OK2BVG >> An: _RSGB_LF >> Verschickt: Mi, 28 Mrz 2012 4:24 am >> Betreff: RE: VLF: DF6NM on 8970.002 >> >> Hello Markus, VLF! >> Your signal is nice visible on my grabber in QRSS6000 and traces in=20 >> QRSS600. In the 6000 window is evident, that we did our VLF QSO in=20 >> time, when the noise conditions were not the best. >> I have written an article about our qso in Czech. It will be publised=20 >> in a ham magazine "Radioamater", common known in The Czech and Slovak=20 >> republic. Some hams would be encouraged to find VLF band by the=20 >> report. :-) >> >> 73! >> >> Lubos, OK2BVG >> >> ----------------------------------------------------------------------= -- >> To: rsgb_lf_group@blacksheep.org >> From: markusvester@aol.com >> Date: Tue, 27 Mar 2012 17:22:42 -0400 >> Subject: VLF: DF6NM on 8970.002 >> >> It's a beautiful night! At 20:25, I have started up a straight=20 >> carrier on 8970.002 Hz (DHO locked). If all stays well I will leave=20 >> it on until after sunrise. >> An interesting observation on the side: In the first few minutes, I=20 >> drove the amp up to 400 mA antenna current. A little corona became=20 >> visible near the ends of two of the three topload wires - it wasn't=20 >> very bright, not unlike 3rd magnitude stars when viewed from the=20 >> ground 10 m below. But the 9 kHz sound from antenna itself could be=20 >> heard quite loudly, which is a potential cause for neighbourhood=20 >> trouble. >> Then I reduced the drive to 350 mA where the corona disappeared=20 >> completely. So did the noise, the antenna became absolutely quiet!=20 >> All that was left was a little noise from the coil in the dustbin on=20 >> the balcony, and the transformer indoors. Thus the predominant cause=20 >> for a squeaking antenna must be corona. The fact that it can be heard=20 >> at 9 rather than 18 kHz demonstrates that the discharge must have an=20 >> asymmetric dependence on the voltage polarity. >> At the same time, wideband electrical noise on the nearby LF grabber=20 >> antenna went down by 20 dB. >> BTW If you like you can actually read my VLF frequency from an alias=20 >> line on the LF TA grabber: It is created by the 24th VLF harmonic,=20 >> intermodulating with DCF 77, thus appearing on 24 x 8970.002 - 77500=20 >> =3D 137780.048 Hz. >> Best regards, >> Markus (DF6NM) > --------------090405090907070205070701 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id q2SAQisE019859 Hi Markus,

Nice work! I can see you in 424 uHz, and traces in 4.5 mHz. You leave a strong trace in 47 uHz, at exactly 8970.0020 Hz! Very nice.
I can see QSB on your signal in that 174 km distance.
What is the ERP?

Go on! :-)

73, Stefan/DK7FC

http://www.iup.uni-heidelberg.de/= schaefer_vlf/DK7FC_VLF_Grabber.html

PS: Lubos, really an excellent Grabber!!




Am 28.03.2012 09:08, schrieb Chris Dillon:
Hi Markus
Good signals here too in 424uHz and 125uHz (peaking 10dB over the noise) alongside Henny and Uwe.
Nice to see VLF busy!

73 Chris G3WCD


On 28/03/2012 07:50, Markus Vester wrote:
The carrier was on air continuously from=C2=A020:26 to=C2=A06:36= this morning.
=C2=A0
Thanks very much to Lubos, as well as to all=C2=A0other live grabber operators. As far as I can see,=C2=A0traces appeared at DK7FC, G3ZJO, OK2BVG, and Paul Nicholson.
Best 73,
Markus
=C2=A0
-= ----Urspr=C3=BCngliche Mitteilung-----
Von: Lubos OK2BVG <b= vgbob@hotmail.com>
An: _RSGB_LF <rsgb_lf_group@blackshee= p.org>
Verschickt: Mi, 28 Mrz 2012 4:24 am
Betreff: RE: VLF: DF6NM on 8970.002

Hello Markus, VLF!
Your signal is nice visible on my grabber in QRSS6000 and traces in QRSS600. In the 6000 window is evident, that we did our VLF QSO in time, when the noise conditions were not the best.=C2=A0
I have written an article about our qso in Czech. It will be publised in a ham magazine "Radioamater", common known in The Czech and Slovak republic. Some hams would be encouraged to find VLF band by the report. :-)

73!

Lubos, OK2BVG

To: rsgb_lf_group@blacksheep.or= g
From: ma= rkusvester@aol.com
Date: Tue, 27 Mar 2012 17:22:42 -0400
Subject: VLF: DF6NM on 8970.002

It's a beautiful night! At 20:25, I have started up a straight carrier on 8970.002 Hz (DHO locked). If all stays well I will leave it on until after sunrise.
=C2=A0
An interesting observation on the side: In the first few minutes, I drove the amp up to 400 mA antenna current. A little corona became visible near the ends of two of the three topload wires - it wasn't very bright, not unlike 3rd magnitude stars when viewed from the ground=C2=A010 m below. But the 9 kHz sound from antenna=C2=A0itself coul= d be heard quite loudly, which is a=C2=A0potential cause=C2=A0for=C2=A0neighbo= urhood trouble.
=C2=A0
Then I reduced the drive to 350 mA where the corona disappeared completely. So did the noise, the antenna=C2=A0became absolut= ely quiet! All that was left was a little=C2=A0noise from the coil in the dustbin on the balcony, and the transformer indoors.=C2=A0Thus the predominant cause for a squeaking antenna must be=C2=A0corona. The fact t= hat it can be heard at 9 rather than 18 kHz=C2=A0demonstrates that=C2=A0the d= ischarge must=C2=A0have=C2=A0an asymmetric dependence on the voltage polarity.
=C2=A0
At the same time, wideband electrical noise on the nearby LF grabber antenna went down by 20 dB.
=C2=A0
BTW If you like you can actually read my VLF frequency from=C2=A0an=C2=A0alias line on the LF TA grabber: It is created by the 2= 4th VLF harmonic, intermodulating with DCF 77,=C2=A0thus appearing on=C2=A024 x 8= 970.002 - 77500 =3D 137780.048 Hz.
=C2=A0
Best regards,
Markus (DF6NM)

--------------090405090907070205070701--