Return-Path: Received: from mtain-dd08.r1000.mx.aol.com (mtain-dd08.r1000.mx.aol.com [172.29.64.148]) by air-me09.mail.aol.com (v129.4) with ESMTP id MAILINME091-8bc04cb80283172; Fri, 15 Oct 2010 03:28:03 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd08.r1000.mx.aol.com (Internet Inbound) with ESMTP id EF70D380000D3; Fri, 15 Oct 2010 03:28:01 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P6egI-0000Ex-7L for rs_out_1@blacksheep.org; Fri, 15 Oct 2010 08:26:22 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P6egH-0000En-FA for rsgb_lf_group@blacksheep.org; Fri, 15 Oct 2010 08:26:21 +0100 Received: from imr-ma06.mx.aol.com ([64.12.78.142]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P6egF-0007tY-9Q for rsgb_lf_group@blacksheep.org; Fri, 15 Oct 2010 08:26:21 +0100 Received: from mtaout-da02.r1000.mx.aol.com (mtaout-da02.r1000.mx.aol.com [172.29.51.130]) by imr-ma06.mx.aol.com (8.14.1/8.14.1) with ESMTP id o9F7Q7s2014245; Fri, 15 Oct 2010 03:26:07 -0400 Received: from Black (nrbg-4d0723e0.pool.mediaWays.net [77.7.35.224]) by mtaout-da02.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 787C1E00008E; Fri, 15 Oct 2010 03:26:06 -0400 (EDT) Message-ID: <1A69CE67B2DB4CAC9DE592EBE2240F52@Black> From: "Markus Vester" To: , "Paul" Cc: =?UTF-8?Q?stefan_Sch=C3=A4fer?= , "Renato Romero" References: <8CD38567F4B0C6A-1C1C-116D@webmail-m021.sysops.aol.com> <8CD3857A734F30A-1C1C-13B7@webmail-m021.sysops.aol.com> <8CD385878F149C2-1C1C-1600@webmail-m021.sysops.aol.com> <4CB62492.1080104@abelian.netcom.co.uk> <47D59C9CBD9D442F87E165B7321ED3AA@Black> <4CB76ACA.8020203@abelian.netcom.co.uk> <79DFC6B819824CE7AE426BC8F6BA65D1@Black> In-Reply-To: <79DFC6B819824CE7AE426BC8F6BA65D1@Black> Date: Fri, 15 Oct 2010 09:25:50 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6000.16480 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16669 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: VLF: Re: Transmitting on 8970.00x now Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CB6C4A.F52455D0" 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_40_50,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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: 3039ac1d40944cb802814387 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_000F_01CB6C4A.F52455D0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Fortunately the VLF transmission ran smoothly during the night. I'll= leave it on until 9:00 UT today to complete a 24 h period, but will= have to shut down and leave the house then. The antenna current was apparently stable, except for a ~ 15% reductio= n sometime between 0:00 and 2:30, presumably due to environmental tuni= ng changes. The signal got lost in the QRN at DK7FC for a few hours,= but seems to be back now at the original level ~ -110 dB. Thanks to all who took the time looking! Best 73,=20 Markus (DF6NM) ----- Original Message -----=20 From: Markus Vester=20 To: Paul=20 Cc: stefan Sch=C3=A4fer ; Renato Romero ; rsgb_lf_group@blacksheep.o= rg=20 Sent: Thursday, October 14, 2010 11:45 PM Subject: VLF: Re: Transmitting on 8970.00x now Well done Paul - yes the "secret" frequency is 8970.002. Not sure wh= ether that is really accurate to the last uHz digit, and if all the ph= ase calculations for samplerate tracking and the software oscillator= are implemented in double precision. There may also be some phase wal= k due to antenna tuning drift - in effect I am feeding a narrow series= resonant circuit by a voltage source. During the first couple of hour= s, I had readjusted the ferrite plate a few times for maximum juice,= and afterwards simply left it set. Everything looks fairly stable, and I have gained enough confidence= by now to leave it running through the rest of the night. We may be= able to see more of the interesting diurnal effects. My only worry is= that the blanket which I wrapped around the coil for acoustic insulat= ion might bedew and start an arc. Guess I will set up my sleeping plac= e beside the transmitter, so I can see the coil every time I wake up..= . This is not a boring hobby ;-) 73, Markus ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org ; Paul=20 Cc: Stefan Sch=C3=A4fer ; Renato Romero=20 Sent: Thursday, October 14, 2010 8:32 PM Subject: VLF: Re: Transmitting on 8970.00x now Transmitter is still on now at 18:30, with stable antenna curren= t and very little wind movement. On Stefan's grabber, the QRN has been= gradually increasing since 16:30 or so, but interestingly my signal= there has also gone up by a couple of dB. Will try to stay on until= local midnight (22 UT) to see if that trend continues. 73, Markus (DF6NM) ----- Original Message -----=20 From: Markus Vester=20 To: Paul=20 Cc: Stefan Sch=C3=A4fer ; Renato Romero ; rsgb_lf_group@blacks= heep.org=20 Sent: Thursday, October 14, 2010 11:06 AM Subject: VLF: Transmitting on 8970.00x now Dear Paul, you are doing a fantastic job! This is absolutely amazing. If you like there will be more food for your processors: I hav= e a day off work, and restarted a carrier again at 8:52 UT (Oct 14).= Antenna conditions are similar as before, but with slightly modified= coil location and acoustical shielding. I will not announce the exact= frequency beforehand, but it is within a few mHz from 8970.0 to fit= into Stefan's 47 uHz window. Good luck to everyone, Markus (DF6NM in JN59NK) ------=_NextPart_000_000F_01CB6C4A.F52455D0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Fortunately the VLF transmission ran= smoothly=20 during the night. I'll leave it on until 9:00 UT today to co= mplete a=20 24 h period, but will have to shut down and leave the house then.
 
The antenna current was apparently st= able, except=20 for a ~ 15% reduction sometime between 0:00 and 2:30, presumably due= to=20 environmental tuning changes. The signal got lost in the QRN at= DK7FC for a=20 few hours, but seems to be back now at the original level ~ -110= =20 dB.
 
Thanks to all who took the=20 time looking!
 
Best 73,
Markus (DF6NM)
 
----- Original Message -----
To: Paul
Sent: Thursday, October 14,= 2010 11:45=20 PM
Subject: VLF: Re: Transmittin= g on=20 8970.00x now
=
Well done Paul - yes the "secr= et" frequency=20 is 8970.002. Not sure whether that is really accurate to the last uH= z=20 digit, and if all the phase calculations for samplerate trackin= g and the=20 software oscillator are implemented in double precision. There may= also be=20 some phase walk due to antenna tuning drift - in effect I= am feeding=20 a narrow series resonant circuit by a voltage source. During the fir= st couple=20 of hours, I had readjusted the ferrite plate a few times for=20 maximum juice, and afterwards simply left it set.
 
Everything looks fairly stable, and= I have gained=20 enough confidence by now to leave it running through the= rest of the=20 night. We may be able to see more of the interesting diurnal effects= . My only=20 worry is that the blanket which I wrapped around the=20 coil for acoustic insulation might bedew and start an= arc.=20 Guess I will set up my sleeping place beside the transmitter, so I= can see the=20 coil every time I wake up...
 
This is not a boring hobby ;= -)
 
73, Markus
 
----- Original Message -----
Sent: Thursday, October= 14, 2010 8:32=20 PM
Subject: VLF: Re: Transmi= tting on=20 8970.00x now

Transmitter is still on now at= 18:30, with=20 stable antenna current and very little wind movement. On St= efan's=20 grabber, the QRN has been gradually increasing since= 16:30 or=20 so, but interestingly my signal there has also gone&nb= sp;up by a=20 couple of dB. Will try to stay on until local midnight (22 UT)= to see if=20 that trend continues.
 
73, Markus (DF6NM)
----- Original Message -----=
To: Paul
Sent: Thursday, October= 14, 2010=20 11:06 AM
Subject: VLF: Transmitt= ing on=20 8970.00x now

Dear Paul,
 
you are doing a fantastic job= ! This is=20 absolutely amazing.
 
If you like there will be mor= e food for=20 your processors: I have a day off work, and restarted a carrie= r again at=20 8:52 UT (Oct 14). Antenna conditions are similar as before,=20 but with slightly modified coil location and acoustical= shielding.=20 I will not announce the exact frequency beforehand, but it&nbs= p;is=20 within a few mHz from 8970.0 to fit into Stefan's 47 uHz= =20 window.
 
Good luck to everyone,=
 
Markus
(DF6NM in=20 JN59NK)
<= /BLOCKQUOTE> ------=_NextPart_000_000F_01CB6C4A.F52455D0--