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[195.171.43.25]) by mx.google.com with ESMTP id y5si29699lbb.177.2013.10.24.13.42.16 for ; Thu, 24 Oct 2013 13:42:17 -0700 (PDT) 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 header.i=@mx.aol.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VZRiU-0004yY-FX for rs_out_1@blacksheep.org; Thu, 24 Oct 2013 21:41:14 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VZRiT-0004yP-QI for rsgb_lf_group@blacksheep.org; Thu, 24 Oct 2013 21:41:13 +0100 Received: from omr-d09.mx.aol.com ([205.188.108.133]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VZRiQ-000380-Td for rsgb_lf_group@blacksheep.org; Thu, 24 Oct 2013 21:41:12 +0100 Received: from mtaout-db02.r1000.mx.aol.com (mtaout-db02.r1000.mx.aol.com [172.29.51.194]) by omr-d09.mx.aol.com (Outbound Mail Relay) with ESMTP id 68892701689D8 for ; Thu, 24 Oct 2013 16:41:08 -0400 (EDT) Received: from White (95-91-237-85-dynip.superkabel.de [95.91.237.85]) by mtaout-db02.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 68806E0000EF for ; Thu, 24 Oct 2013 16:41:07 -0400 (EDT) Message-ID: <5EFA3E766995409E9D1291A076129497@White> From: "Markus Vester" To: References: <8D09D2787E89EA5-1144-34813@webmail-m103.sysops.aol.com> <8D09E06ACFC5EA0-E3C-2175@webmail-d226.sysops.aol.com> Date: Thu, 24 Oct 2013 22:41:05 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1382647268; bh=oGngx/S8mi4JWJYdgAIpaSyJckgfBxjZhV+Ow2YQiqM=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=QvAhTVzu2odnw9VOOEwWnhXX8UEwf4uxwgaiMQyUq69qoxCHYXKkA2L66jRgrK4QQ AfEUx9m0WbKsbBakOGj303kyVjAsuDvvZT2MtZY2jevB1852+/vR+DR1yRz2Ruw6wX nrduypejW7kzOJLhvLtMKfslAWzgJ6j+AzDGSu9A= x-aol-sid: 3039ac1d33c2526985e23781 X-AOL-IP: 95.91.237.85 X-Spam-Score: -0.4 (/) 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: Some more traces from Bob around 3 UT last night, but somewhat worse than the night before: df6nm.bplaced.net/LF/74kHz/74k_131024_0600.png The fieldstrength pattern of CFH 73.6 kHz seems pretty much reproducible (when its's on). Levels at the same hour in different nights seem to vary by no more than 3 dB or so: df6nm.bplaced.net/LF/74kHz/plot_131024_0712.png [...] Content analysis details: (-0.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [205.188.108.133 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.4 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: 16a6530e4735ccb856cf9bc7c6cb9773 Subject: Re: LF: CFH, 74.55 kHz Content-Type: multipart/alternative; boundary="----=_NextPart_000_0022_01CED10A.1FABE440" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_40_50, HTML_FONTCOLOR_UNKNOWN,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 Status: O X-Status: X-Keywords: X-UID: 2211 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0022_01CED10A.1FABE440 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Some more traces from Bob around 3 UT last night, but somewhat worse = than the night before: df6nm.bplaced.net/LF/74kHz/74k_131024_0600.png The fieldstrength pattern of CFH 73.6 kHz seems pretty much reproducible = (when its's on). Levels at the same hour in different nights seem to = vary by no more than 3 dB or so: df6nm.bplaced.net/LF/74kHz/plot_131024_0712.png Bob, Loran-C is really not a problem here as the spectrum predominantly = consists of discrete sharp lines. Even with advanced modulation schemes = (Eurofix, eLoran), there's relatively little noise emitted between the = lines. To me, Loran is actually more of a blessing because the lines = provides a precise frequency reference. And it can be used for detailed = propagation monitoring as well: last night, the two traces from Wildwood = were again strong between 21:30 and 7 UT.=20 The 74 kHz noise here is mostly "made in Germany" by the DCF77 time = signal station, which is phase-modulated by a 645.833 bit/s pseudorandom = sequence, repeating every second. The bad thing for us is that this = modulation is inverted with the disseminated timecode and weather = information, which spreads a significant part of the power between the 1 = Hz harmonics. Going down to say 72.4 kHz would probably improve things = here. Best 73, Markus (DF6NM) From: Markus Vester=20 Sent: Wednesday, October 23, 2013 2:58 PM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: CFH, 74.55 kHz Last night some traces from Bob finally appeared in Nuernberg, albeit a = far cry from the excellent receptions of Mike, Henny, Victor and = Hartmut. df6nm.bplaced.net/LF/74kHz/74k_131023_0400.png CFH 73.6 kHz dropped out before midnight but came back a few hours later df6nm.bplaced.net/LF/74kHz/plot_131023_0646.png Experimental Loran-C transmissions from Wildwood / Cape May are still = ongoing, strong enough to leave a weak daytime trace here. Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group Verschickt: Di, 22 Okt 2013 12:22 pm Betreff: LF: CFH, Loran Wildwood Last night, CFH 73.6 kHz apparently went off air at midnight UT:=20 http://dl.dropboxusercontent.com/u/26404526/74kHz/plot_131022_0638.png df6nm.bplaced.net/LF/74kHz/ (selected captures) I noticed the lines in Jay's Eu grabber, and found that Loran-C from = Wildwood was active again: http://www.df6nm.de/LoranView/LoranGrabber.htm Best 73,=20 Markus (DF6NM) ------=_NextPart_000_0022_01CED10A.1FABE440 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Some more traces from Bob around 3 UT = last night,=20 but somewhat worse than the night before:
df6nm.bpla= ced.net/LF/74kHz/74k_131024_0600.png
 
The fieldstrength pattern of CFH 73.6 = kHz seems=20 pretty much reproducible (when its's on). Levels at the same = hour in=20 different nights seem to vary by no more than 3 dB or=20 so:
df6nm.bpl= aced.net/LF/74kHz/plot_131024_0712.png
 
Bob, Loran-C is really not a problem = here as the=20 spectrum predominantly consists of discrete sharp lines. Even with = advanced=20 modulation schemes (Eurofix, eLoran), there's relatively little = noise=20 emitted between the lines. To me, Loran is actually more of a = blessing=20 because the lines provides a precise frequency reference. And it = can be=20 used for detailed propagation monitoring as well: last night, the two = traces=20 from Wildwood were again strong between 21:30 and 7 = UT. 
 
The 74 kHz noise here is mostly "made = in Germany"=20 by the DCF77 time signal station, which is phase-modulated by = a=20 645.833 bit/s pseudorandom sequence, repeating every second. The bad = thing for=20 us is that this modulation is inverted with the disseminated = timecode and=20 weather information, which spreads a significant part of the = power between=20 the 1 Hz harmonics. Going down to say 72.4 kHz would probably improve = things=20 here.
 
Best 73,
Markus (DF6NM)
 
 

Sent: Wednesday, October 23, 2013 2:58 PM
Subject: LF: CFH, 74.55 kHz

Last night some traces from Bob = finally=20 appeared in Nuernberg, albeit a far cry from the excellent = receptions of=20 Mike, Henny, Victor and Hartmut.
df6nm.bpla= ced.net/LF/74kHz/74k_131023_0400.png
 
CFH 73.6 kHz dropped out before midnight but came back a few hours=20 later
df6nm.bpl= aced.net/LF/74kHz/plot_131023_0646.png
Experimental Loran-C transmissions from Wildwood / Cape May are = still=20 ongoing, strong enough to leave a weak daytime trace = here.
 
Best 73,
Markus (DF6NM)
 
 
-----Urspr=C3=BCngliche Mitteilung-----
Von: Markus = Vester=20 <markusvester@aol.com>
An: rsgb_lf_group=20 <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 22 Okt 2013 = 12:22=20 pm
Betreff: LF: CFH, Loran Wildwood

Last = night, CFH=20 73.6 kHz apparently went off air at midnight UT:
http://dl.dropboxusercontent.com/u/26404526/74kHz/plot_13= 1022_0638.png
df6nm.bplaced.net/LF/74kHz/ =20 (selected captures)
 
I = noticed the=20 lines in Jay's Eu grabber, and found that Loran-C from Wildwood was = active=20 again:
http://www.df6nm.de/LoranView/LoranGrabber.htm
 
Best = 73,=20
Markus (DF6NM)
 
 
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