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[195.171.43.25]) by mx.google.com with ESMTP id ja20si4323980wic.14.2014.01.05.16.38.53 for ; Sun, 05 Jan 2014 16:38:54 -0800 (PST) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org; dkim=pass (test mode) header.i=@comcast.net Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Vzxhk-0002iR-2P for rs_out_1@blacksheep.org; Mon, 06 Jan 2014 00:06:04 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Vzxhi-0002iI-V7 for rsgb_lf_group@blacksheep.org; Mon, 06 Jan 2014 00:06:02 +0000 Received: from qmta07.emeryville.ca.mail.comcast.net ([76.96.30.64]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1Vzxhd-0004bE-QW for rsgb_lf_group@blacksheep.org; Mon, 06 Jan 2014 00:06:01 +0000 Received: from omta17.emeryville.ca.mail.comcast.net ([76.96.30.73]) by qmta07.emeryville.ca.mail.comcast.net with comcast id APkB1n0041afHeLA7Q5v6M; Mon, 06 Jan 2014 00:05:55 +0000 Received: from Owner ([166.137.180.50]) by omta17.emeryville.ca.mail.comcast.net with comcast id AQ5Z1n00V15ePUe8dQ5fKk; Mon, 06 Jan 2014 00:05:50 +0000 From: "hvanesce" To: References: <4D3D3F8DEB844195AA057E71DA064D78@White> <05f101cf0a6d$80b36ff0$821a4fd0$@comcast.net> <379A6A06C1CA4AB6838535B3075123D8@White> In-Reply-To: <379A6A06C1CA4AB6838535B3075123D8@White> Date: Sun, 5 Jan 2014 17:05:16 -0700 Message-ID: <060201cf0a73$0493b6e0$0dbb24a0$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQMG80gDxOAjVK2qhspWx8Hsr6+GzgHDJC8kAmChdX2X5d6T8A== Content-Language: en-us DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1388966755; bh=oTa/eZ1tDCqXxBMPyaxE10uA9hxAT8p+/cDzLpWkXJg=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=h/rQjuGkYUG2bmOvO1Bd9vHCgEq9uGSLX3MRfVXBbOCI6px+Jp8IE4tvY2l7y1Ix6 1jachUNNZtX+bLNEESm9ZsjLOAmby+K6/Cr4p1Dp5v+VCHO9AkHGOqMUfBCb7Zp/0q U42+E4TgOEl21gtgvDcKDGdCfJ6AIhyg22L8ZarCbcZOme2HgzMeqGh/SaZ/BBQ4oT gmkec8HTnkvmfr5AnOmIqbuhTOx+BNwc+bU/QApKCqgDC7tMkz4EtyRYj+pRIt2z1c ZmaowvRHbqnTnvKACuskZWNBJIwfDWP4f5den5E6xhv+w7DoZ0p4FaA7yB5tXCzWKE IqCQKFwkPHn+g== X-Spam-Score: -0.1 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Markus, Thank you, I will contact Paul. I also have a 3kW VLF PA with matched 70m antenna operational. The TX oscillator stability is ~ 500uHz rms over 4 hours; will replace with Thunderbolt GPSDO when it arrives this month (ordered 1 for RX and 1 for TX). If you think this could be useful in Paul’s efforts I’ll make it available. [...] Content analysis details: (-0.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [76.96.30.64 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hvanesce[at]comcast.net) -0.0 SPF_PASS SPF: sender matches SPF record -0.1 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: b843b92a4a25666dd9dbb30c4f27eae0 Subject: RE: LF: RE: Opds-4H detections in Todmorden Content-Type: multipart/alternative; boundary="----=_NextPart_000_0603_01CF0A38.58366580" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_50_60,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 This is a multipart message in MIME format. ------=_NextPart_000_0603_01CF0A38.58366580 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Markus, =20 Thank you, I will contact Paul. =20 I also have a 3kW VLF PA with matched 70m antenna operational. The TX oscillator stability is ~ 500uHz rms over 4 hours; will replace with Thunderbolt GPSDO when it arrives this month (ordered 1 for RX and 1 for TX). If you think this could be useful in Paul=92s efforts I=92ll make = it available.=20 =20 73, Jim AA5BW =20 =20 From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus Vester Sent: Sunday, January 5, 2014 4:49 PM To: rsgb_lf_group@blacksheep.org Cc: Paul Subject: Re: LF: RE: Opds-4H detections in Todmorden =20 Hi Jim, thanks for the flowers - yes we were all excited about these possibilities.=20 =20 But it's still a long way to go to the other side of the pond... Paul mentioned that he is interested in possible overseas detections of eg. a long carrier from an amateur station. So it may be worthwhile for you to = get in direct contact to him. Paul is also maintaining the Natural Radio VLF Discussion Group on Yahoo: http://tech.dir.groups.yahoo.com/neo/groups/VLF_Group/conversations/messa= ges =20 Best 73, Markus =20 From: hvanesce =20 Sent: Monday, January 06, 2014 12:25 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: RE: Opds-4H detections in Todmorden =20 Markus, Paul, Stefan and Uwe, =20 Outstanding collaboration and individual work! This is quite exciting. Directionally optimized 55uHz VLF Opera rings in the new year on a very memorable note. =20 Markus, was your TX configuration ~.3A to 9m, ~ 20uW? =20 Thank you for the good news, and the fine collaboration. =20 73, Jim AA5BW =20 =20 =20 =20 From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus Vester Sent: Sunday, January 5, 2014 3:15 PM To: rsgb_lf_group@blacksheep.org Cc: Paul Subject: VLF: Opds-4H detections in Todmorden =20 Most who are interested in VLF will be aware of the excellent work of = Paul Nicholson, who is running a very sensitive dual-loop receiver for VLF = and natural radio in Todmorden UK. He is also actively interested in = monitoring man-made VLF signals, and has provided outstanding reception reports on several low-power transmit experiments. =20 With the recent upsurge of trying to put Opera mode to work at VLF, Paul = has kindly provided spectrum data during announced Opera-4H transmissions = from DJ8WX and myself. In Todmorden, signals from the two loops are = continuously being digitized along with GPS time stamps. The loops were combined in software for maximum SNR from the expected direction, and noise blanking = was applied. Then relevant five-hour chunks were Fourier transformed (0.12 = Hz around 8970 Hz, 54.936 =B5Hz bin width) and emailed to me. Here the = files were fed to unmodified Opds correlation software, using a search list = containing nine callsigns from potential VLF transmit stations http://dl.dropboxusercontent.com/u/26404526/callsloc_vlf.txt. This = process has resulted in four unambiguous hits: =20 Receiver: Paul Nicholson IO83XQ Opds-4H 8969.94 - 8972.06 Hz date time call distance frequency bandwidth snr = correlation 2014-01-02 06:14:01 DJ8WX 760km 8969.997Hz 0mHz -54.1dBOp 100% = 17.2dB 2014-01-02 01:50:49 DJ8WX 760km 8969.997Hz 0mHz -55.0dBOp 100% = 18.0dB 2014-01-01 16:36:38 DJ8WX 760km 8969.990Hz 0mHz -53.6dBOp 100% = 16.4dB 2014-01-01 14:22:32 DF6NM 1026km 8970.000Hz 0mHz -59.1dBOp 100% = 16.3dB =20 For comparison, my first two Op-4H transmissions on Dec 31st had been successfully detected by Stefan in Heidelberg, but have not produced sufficient SNR in Todmorden at the time. =20 Receiver: DK7FC JN49IK VLF OPDS-4H correlation Range: 8969.87 ... = 8970.23 Hz date time call distance frequency bandwidth snr = correlation 2013-12-31 22:30:04 DF6NM 175km 8970.000Hz 0mHz -60.3dBOp 82% = 14.2dB 2013-12-31 18:07:58 DF6NM 175km 8970.000Hz 0mHz -58.3dBOp 100% = 17.0dB =20 Today we were able to also extract transmissions on Uwe's new frequency = 8270 Hz, although the SNR seemed not as good as before: =20 Receiver: Paul Nicholson IO83XQ Opds-4H 8269.94 - 8272.06 Hz date time call distance frequency bandwidth snr = correlation 2014-01-05 07:18:54 DJ8WX 760km 8270.000Hz 0mHz -57.2dBOp 97% = 15.1dB 2014-01-05 02:55:38 DJ8WX 760km 8270.000Hz 0mHz -56.1dBOp 100% = 14.4dB 2014-01-04 22:32:14 DJ8WX 760km 8270.000Hz 0mHz -57.6dBOp 100% = 12.8dB =20 Currently Uwe has another transmission ongoing, and the carrier is = visible on Paul's spectrogram http://abelian.org/vlf/fbins2.shtml#b=3D080 &s=3Dsp =20 Many thanks to Paul, Uwe, Stefan, and all who have contributed to this = fine success! =20 Best 73, Markus (DF6NM) =20 ------=_NextPart_000_0603_01CF0A38.58366580 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Markus,

 

Thank you, I will contact Paul.

 

I also have a 3kW VLF PA with matched 70m antenna operational. The TX = oscillator stability is ~ 500uHz rms over 4 hours; will replace with = Thunderbolt GPSDO when it arrives this month (ordered 1 for RX and 1 for = TX). If you think this could be useful in Paul’s efforts = I’ll make it available.

 

73,=A0=A0 Jim AA5BW =A0

 

From:= = owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus = Vester
Sent: Sunday, January 5, 2014 4:49 PM
To: = rsgb_lf_group@blacksheep.org
Cc: Paul
Subject: Re: = LF: RE: Opds-4H detections in = Todmorden

 

Hi Jim, = thanks for the flowers - yes we were all excited about these = possibilities.

 

But it's= still a long way to go to the other side of the pond... Paul mentioned = that he is interested in possible overseas detections of eg. a long = carrier from an amateur station. So it may be worthwhile for you to get = in direct contact to him. Paul is also maintaining the Natural = Radio VLF Discussion Group on Yahoo: http://tech.dir.groups.yahoo.com/neo/groups/VLF_Group/conversatio= ns/messages

 

Best = 73,

Markus=


 

From:= = hvanesce =

Sent:= = Monday, January 06, 2014 12:25 AM

Subject: LF: RE: = Opds-4H detections in = Todmorden

 

Markus, Paul, Stefan and Uwe,

 

Outstanding collaboration and individual work! This is quite = exciting. Directionally optimized 55uHz VLF Opera rings in the new year = on a very memorable note.

 

Markus, was your TX configuration ~.3A to 9m, ~ = 20uW?

 

Thank you for the good news, and the fine = collaboration.

 

73,  Jim AA5BW

 

 

 

 

From:= = owner-rsgb_lf_group@bl= acksheep.org [mailto:owner-rsgb_lf_g= roup@blacksheep.org] On Behalf Of Markus = Vester
Sent: Sunday, January 5, 2014 3:15 PM
To: rsgb_lf_group@blacksheep.org=
Cc: Paul
Subject: VLF: Opds-4H detections in = Todmorden

 

Most who are = interested in VLF will be aware of the excellent work of Paul Nicholson, = who is running a very sensitive dual-loop receiver for VLF and natural = radio in Todmorden UK. He is also actively interested in monitoring = man-made VLF signals, and has provided outstanding reception reports on = several low-power transmit = experiments.

 

With the = recent upsurge of trying to put Opera mode to work at VLF, Paul has = kindly provided spectrum data during announced Opera-4H transmissions = from DJ8WX and myself. In Todmorden, signals from the two loops are = continuously being digitized along with GPS time stamps. The loops were = combined in software for maximum SNR from the expected direction, and = noise blanking was applied. Then relevant five-hour chunks were Fourier = transformed (0.12 Hz around 8970 Hz, 54.936 =B5Hz bin width) and emailed = to me. Here the files were fed to unmodified Opds correlation software, = using a search list containing nine callsigns from potential VLF = transmit stations http://dl.dropboxusercontent.com/u/26404526/callsloc_vlf.txt.= This process has resulted in four unambiguous = hits:

 

Receiver: = Paul Nicholson  IO83XQ   Opds-4H   8969.94 - = 8972.06 Hz
   date      = time   call   distance  frequency = bandwidth  snr    correlation
2014-01-02 06:14:01 = DJ8WX    760km   8969.997Hz   0mHz = -54.1dBOp 100% 17.2dB
2014-01-02 01:50:49 DJ8WX    = 760km   8969.997Hz   0mHz -55.0dBOp 100% = 18.0dB
2014-01-01 16:36:38 DJ8WX    760km   = 8969.990Hz   0mHz -53.6dBOp 100% 16.4dB
2014-01-01 14:22:32 = DF6NM   1026km   8970.000Hz   0mHz = -59.1dBOp 100% 16.3dB

 

For = comparison, my first two Op-4H transmissions on Dec 31st had been = successfully detected by Stefan in Heidelberg, but have not produced = sufficient SNR in Todmorden at the = time.

 

Receiver: = DK7FC JN49IK VLF OPDS-4H correlation  Range: 8969.87 ... 8970.23 = Hz
   date      time   = call   distance  frequency bandwidth  = snr    correlation
2013-12-31 22:30:04 = DF6NM    175km   8970.000Hz   0mHz = -60.3dBOp  82% 14.2dB
2013-12-31 18:07:58 = DF6NM    175km   8970.000Hz   0mHz = -58.3dBOp 100% 17.0dB

 

Today we = were able to also extract transmissions on Uwe's new frequency 8270 Hz, = although the SNR seemed not as good as = before:

 

Receiver: = Paul Nicholson  IO83XQ   Opds-4H   8269.94 - = 8272.06 Hz
   date      = time   call   distance  frequency = bandwidth  snr    correlation
2014-01-05 07:18:54 = DJ8WX    760km   8270.000Hz   0mHz = -57.2dBOp  97% 15.1dB
2014-01-05 02:55:38 = DJ8WX    760km   8270.000Hz   0mHz = -56.1dBOp 100% 14.4dB
2014-01-04 22:32:14 DJ8WX    = 760km   8270.000Hz   0mHz -57.6dBOp 100% = 12.8dB

 

Currently = Uwe has another transmission ongoing, and the carrier is visible on = Paul's spectrogram http://ab= elian.org/vlf/fbins2.shtml#b=3D080&s=3Dsp
 
Many = thanks to Paul, Uwe, Stefan, and all who have contributed to this fine = success!

 

Best = 73,
Markus = (DF6NM)
 

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