Return-Path: Received: from mtain-dd04.r1000.mx.aol.com (mtain-dd04.r1000.mx.aol.com [172.29.64.144]) by air-ma02.mail.aol.com (v129.4) with ESMTP id MAILINMA021-b4f34d2353bb13f; Tue, 04 Jan 2011 12:07:07 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3C18C38000107; Tue, 4 Jan 2011 12:07:03 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PaAKP-0006q9-70 for rs_out_1@blacksheep.org; Tue, 04 Jan 2011 17:05:45 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PaAKO-0006q0-Du for rsgb_lf_group@blacksheep.org; Tue, 04 Jan 2011 17:05:44 +0000 Received: from smtp207.alice.it ([82.57.200.103]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PaAKM-0005oR-G1 for rsgb_lf_group@blacksheep.org; Tue, 04 Jan 2011 17:05:44 +0000 Received: from PCFausto (82.50.25.167) by smtp207.alice.it (8.5.124.08) id 4C9E16C9080B4002 for rsgb_lf_group@blacksheep.org; Tue, 4 Jan 2011 18:05:37 +0100 Message-ID: From: "Fausto Coletti" To: References: <1E6E217DE1914FEEB537C3126F277ADE@PCFausto> <27E892F4-A535-4FA0-9040-14ED2443BB40@numeo.fr> In-Reply-To: <27E892F4-A535-4FA0-9040-14ED2443BB40@numeo.fr> Date: Tue, 4 Jan 2011 18:05:37 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18263 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Luxembourg effect Content-Type: multipart/alternative; boundary="----=_NextPart_000_0041_01CBAC39.FDA0FA90" 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: 3039ac1d40904d2353b74028 X-AOL-IP: 195.171.43.25 ------=_NextPart_000_0041_01CBAC39.FDA0FA90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I could not send the audio file attachment to the reflector, i think= for Kb limit,=20 the signal is not strong and is audible also with 30 dB attenuator at= the antenna so,=20 is not a receiver overload. I have read some documentation and i think= that=20 this "ghost signal" is Luxembourg effect.=20 Note that i receive it only after sunset. During daylight the signal= disappears.=20 Fausto IK4NMF ----- Original Message -----=20 From: John Rabson=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Tuesday, January 04, 2011 10:34 AM Subject: Re: LF: Luxembourg effect Fausto, I believe the Luxembourg effect is a form of cross-modulation occurr= ing in the ionosphere when there is a high power transmitting station= somewhere on the path between the receiving and transmitting stations= , but the signal from the interfering station is not strong enough to= overload the receiver. Could one of our propagation experts provide a more detailed explana= tion please? 73 John F5VLF On 3 Jan 2011, at 15:59CET, Fausto Coletti wrote: Is this a Luxembourg effect ? First 40 sec i listen at 137 KHz, after i tune at 153 KHz on the= original transmission. RX is a Perseus SDR with a 200 KHz low pass filter at the input fo= r eliminate MF overload. The word "trial" every tot second is because i have install a tria= l version of VAC software. Fausto IK4NMF ----------------------------------------------------------------------= -------- Nessun virus nel messaggio. Controllato da AVG - www.avg.com Versione: 10.0.1191 / Database dei virus: 1435/3357 - Data di rilasc= io: 03/01/2011 ------=_NextPart_000_0041_01CBAC39.FDA0FA90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I could not send the audio file attac= hment to the=20 reflector, i think for Kb limit,
the signal is not strong and is audib= le also with=20 30 dB attenuator at the antenna so,
is not a receiver overload. I have re= ad some=20 documentation and i think that
this "ghost signal" is Luxembourg eff= ect.=20
Note that i receive it only afte= r=20 sunset.  During daylight the signal disappears.
 
Fausto IK4NMF
----- Original Message -----
From:=20 John=20 Rabson
Sent: Tuesday, January 04, 20= 11 10:34=20 AM
Subject: Re: LF: Luxembourg= effect

Fausto,

I believe the Luxembourg effect is a form of cross-modulation= occurring=20 in the ionosphere when there is a high power transmitting station so= mewhere on=20 the path between the receiving and transmitting stations, but the si= gnal from=20 the interfering station is not strong enough to overload the receive= r.

Could one of our propagation experts provide a more detailed ex= planation=20 please?

73
John F5VLF

On 3 Jan 2011, at 15:59CET, Fausto Coletti wrote:

Is this a Luxembourg effect ?
First 40 sec i listen at 137 KHz,= after i tune=20 at 153 KHz on the original transmission.
RX is a Perseus SDR with a 200 KH= z low pass=20 filter at the input for eliminate MF overload.
The word "trial" every tot second= is because i=20 have install a trial version of VAC software.
 
Fausto=20 IK4NMF

Nessun virus nel= =20 messaggio.
Controllato da AVG - www.avg.com
Versione: 10.0.1191 / Database=20 dei virus: 1435/3357 - Data di rilascio:=20 03/01/2011

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