Return-Path: Received: from rly-mg06.mx.aol.com (rly-mg06.mail.aol.com [172.20.83.112]) by air-mg09.mail.aol.com (v126.13) with ESMTP id MAILINMG092-a1d4b2a5e86cc; Thu, 17 Dec 2009 11:38:46 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mg06.mx.aol.com (v125.7) with ESMTP id MAILRELAYINMG067-a1d4b2a5e86cc; Thu, 17 Dec 2009 11:38:32 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NLJIz-0007Zx-Fn for rs_out_1@blacksheep.org; Thu, 17 Dec 2009 16:34:21 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NLJIz-0007Zo-4Z for rsgb_lf_group@blacksheep.org; Thu, 17 Dec 2009 16:34:21 +0000 Received: from pne-smtpout2-sn1.fre.skanova.net ([81.228.11.159]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NLJLM-0005WM-7s for rsgb_lf_group@blacksheep.org; Thu, 17 Dec 2009 16:36:50 +0000 Received: from [127.0.0.1] (81.235.167.68) by pne-smtpout2-sn1.fre.skanova.net (7.3.140.3) (authenticated as u33233109) id 4AE177E2007726E6 for rsgb_lf_group@blacksheep.org; Thu, 17 Dec 2009 17:37:12 +0100 Message-ID: <4B2A5E38.1090403@telia.com> Date: Thu, 17 Dec 2009 17:37:12 +0100 From: "Johan H. Bodin" User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4B2A4FAE.9010805@usa.net> In-Reply-To: <4B2A4FAE.9010805@usa.net> X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Is this the Luxembourg effect ? Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Yes Alberto, it sounds like the Luxembourg effect. I have a heard a similar effect many times on DCF39's carrier. The high tones of the modulation are attenuated, probably because of some "thermal inertia" in the electron stuff up there. 73 Johan SM6LKM ---- Alberto di Bene wrote: > LF group, > > tuning at 128.930 kHz, the frequency of the German power utility > station, in USB mode, > I can hear what is possible to listen to in this 30 sec. MP3 file : > > http://www.sdradio.eu/audio/luxmbrg.mp3 > > Is this what is called the Luxembourg effect ? I hear a mix of various > broadcasting stations > in the intervals between the data streams. I used the mini-whip and > Perseus, and strongly doubt > that one of these components can be the cause of what otherwise could be > attributed to intermodulation. > Or, saying it better, it *is* intermodulation, but the responsible is > the ionosphere. > > Am I right ? Is that the (in)famous Luxembourg effect ? Or there is > another reason for that ? > > TNX > > 73 Alberto I2PHD