Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk03.r1000.mx.aol.com (Internet Inbound) with ESMTP id C9B6738000084; Sun, 6 Jan 2013 12:53:11 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Tru2d-0000ZK-9h for rs_out_1@blacksheep.org; Sun, 06 Jan 2013 17:29:47 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Tru2c-0000Z1-CD for rsgb_lf_group@blacksheep.org; Sun, 06 Jan 2013 17:29:46 +0000 Received: from imr-mb02.mx.aol.com ([64.12.207.163]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1Tru2Z-0001wK-Tw for rsgb_lf_group@blacksheep.org; Sun, 06 Jan 2013 17:29:45 +0000 Received: from mtaout-mb01.r1000.mx.aol.com (mtaout-mb01.r1000.mx.aol.com [172.29.41.65]) by imr-mb02.mx.aol.com (Outbound Mail Relay) with ESMTP id 5F76338000060; Sun, 6 Jan 2013 12:29:22 -0500 (EST) Received: from Black (188-194-147-142-dynip.superkabel.de [188.194.147.142]) by mtaout-mb01.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 23651E000087; Sun, 6 Jan 2013 12:29:20 -0500 (EST) Message-ID: <71BE51CFEE0D4821BF900184D78D2582@Black> From: "Markus Vester" To: Cc: , Date: Sun, 6 Jan 2013 18:29:15 +0100 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 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1357493362; bh=sXteBSoNrAd1qH8Iwhmdlv6PW/P4oIUswRayULMiy54=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=vt2NAwZNXce9OD4LuT0LKUFRvN1zXUpb1i08U+evg/+uSVkhX11AhoQtutpOo3JWg YrdAOYF7salLTMDoTOeRK70hVyvX/tFs+VPFfxtF0FWUUWsI/1NCHD5LOoIVBX+e1X V3TElaLVbSvHUPoP4vKuDOvRYGLe9UGb1tyOzJQA= X-AOL-SCOLL-SCORE: 0:2:343280960:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-Spam-Score: 0.0 (/) 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: The same Czech programme is also transmitted from Topolná on 270 kHz, so that one would more likely be the heater. Interestingly the crossmodulation source is almost twice the frequency as the victim. Well almost, but not exactly - so that I still can't think of a simple physical mechanism to explain the asymmetry. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [64.12.207.163 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 0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 WEIRD_PORT URI: Uses non-standard port number for HTTP 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: 84016abdd353c82964b6d256164a353f Subject: LF: Re: Asymmetric Luxembourg Effect on HGA Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01CDEC3B.BB599BD0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, MISSING_OUTLOOK_NAME,WEIRD_PORT 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-AUTHENTICATION: mtain-dk03.r1000.mx.aol.com ; domain : mx.aol.com DKIM : fail X-AOL-OVERRIDE-PIK-REASON: Y x-aol-sid: 3039ac1db40750e9ba072bd3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_002E_01CDEC3B.BB599BD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable The same Czech programme is also transmitted from Topoln=E1 on 270 kHz, = so that one would more likely be the heater. Interestingly the = crossmodulation source is almost twice the frequency as the victim. Well = almost, but not exactly - so that I still can't think of a simple = physical mechanism to explain the asymmetry. Best 73, Markus (DF6NM) =20 ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Cc: rsgb_lf_group@yahoogroups.co.uk=20 Sent: Sunday, January 06, 2013 5:44 PM Subject: Asymmetric Luxembourg Effect on HGA On the occasion of watching the LF band on the Twente WebSDR, I = noticed an unusual Luxembourg effect on the HGA carrier 135.43 kHz. In = addition to the "normal" ICM mumbling which is muffled and symmetrical = on both sidebands, the lower sideband carries a relatively strong and = wideband modulation. A quick listening scan of strong BC stations shows = that the modulation coincides with 639 kHz from Prag, which is radiating = 750 kW from a pair of 355 m high antennas. The geographic constellation = (Budapest - Prag - Holland) looks plausible for ionospheric heating, but = I have no explanation whatsoever for that one-sided spectrum! =20 Take a look yourself on http://websdr.ewi.utwente.nl:8901/ Best 73, Markus (DF6NM) ------=_NextPart_000_002E_01CDEC3B.BB599BD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
The same Czech programme is also = transmitted from=20 Topoln=E1 on 270 kHz, so that one would more likely be the heater. = Interestingly=20 the crossmodulation source is almost twice the frequency as the victim. = Well=20 almost, but not exactly - so that I still can't think of a simple = physical=20 mechanism to explain the asymmetry.
 
Best 73,
Markus (DF6NM)
  
----- Original Message -----
From:=20 Markus=20 Vester
Cc: rsgb_lf_group@yahoogroups= .co.uk=20
Sent: Sunday, January 06, 2013 = 5:44=20 PM
Subject: Asymmetric Luxembourg = Effect on=20 HGA

On the occasion of watching the LF = band on=20 the Twente WebSDR, I noticed an unusual Luxembourg effect on = the HGA=20 carrier 135.43 kHz. In addition to the "normal" ICM mumbling = which is=20 muffled and symmetrical on both sidebands, the lower sideband = carries a=20 relatively strong and wideband modulation. A quick listening scan of = strong BC=20 stations shows that the modulation coincides with 639 kHz from = Prag,=20 which is radiating 750 kW from a pair of 355 m high = antennas. The=20 geographic constellation (Budapest - Prag - Holland) looks plausible = for=20 ionospheric heating, but I have no explanation whatsoever for that = one-sided=20 spectrum! 
 
Take a look yourself on http://websdr.ewi.utwente.nl:= 8901/
 
Best 73,
Markus (DF6NM)
 
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