Return-Path: X-Spam-DCC: paranoid 1102; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id t4UM0HrB032519 for ; Sun, 31 May 2015 00:00:17 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Yyojy-0000i6-D5 for rs_out_1@blacksheep.org; Sat, 30 May 2015 22:56:26 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Yyojx-0000hx-To for rsgb_lf_group@blacksheep.org; Sat, 30 May 2015 22:56:25 +0100 Received: from omr-m01.mx.aol.com ([64.12.143.75]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.85) (envelope-from ) id 1Yyojv-00020p-Gh for rsgb_lf_group@blacksheep.org; Sat, 30 May 2015 22:56:24 +0100 Received: from mtaout-mce02.mx.aol.com (mtaout-mce02.mx.aol.com [172.29.27.206]) by omr-m01.mx.aol.com (Outbound Mail Relay) with ESMTP id DAE14700000BD for ; Sat, 30 May 2015 17:56:19 -0400 (EDT) Received: from White (ipb21bee4a.dynamic.kabel-deutschland.de [178.27.238.74]) by mtaout-mce02.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 137BA38000088 for ; Sat, 30 May 2015 17:56:16 -0400 (EDT) Message-ID: <6631D15870CA4874B8A428964C437E00@White> From: "Markus Vester" To: References: <5568E23F.5070907@posteo.de> <98550314F4E343FF8ACABAF3E7D5FC8B@MichaelSappPC> Date: Sat, 30 May 2015 23:56:15 +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=20140625; t=1433022979; bh=q1hH4OwrCsaa/pHBgGXmiWbGzFtNBzXcN0eOQOJTcv0=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=WU2K4z7OsX9D1BgrtQQJAuzGR0ozL9/wSc5ZIPun7ikNPfY07TBn79OkwhVwTe8Ud tW86vF5FxPELCX1o9l7fHzFF14sZXZm23VMzK67JmWpcNsPcTlz/h7FPCBP5DTMGtV s5k1OjSOpv2OGvvqKlm7GaOxCmHSE5u5ubBheHVU= x-aol-sid: 3039ac1d1bce556a32003643 X-AOL-IP: 178.27.238.74 X-Scan-Signature: 671be81035fb274514daa81d2095bf05 Subject: Re: LF: Almost Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01D09B34.36BE7300" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 3365 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0004_01D09B34.36BE7300 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Mike, thanks for the explanations, nice work indeed!=20 I am are also plagued by a lot of local interference from our dense = suburban neighbourhood. especially on MF there seems to be a surprising = diversity of signatures: there's the plain common SMPS hash, usually 100 = Hz FM-modulated across several kHz. At times I get what looks like just = plain white noise, with variable power density. But then there are also = apparently crystal controlled carriers going on and off, often with = sidebands which sometimes mimick intelligent modulation. Are you currently monitoring WSPR-2 only, or also -15? All the best, Markus (DF6NM) From: Michael Sapp=20 Sent: Saturday, May 30, 2015 8:33 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Almost Markus: I do not think the QRM signals are spurious. I have built the = W1VD preselector for 475~500 kHz range and the offending signals are = still present when the preselector is used. Same with the FZ-02 filter. = There are some commercial and retail shops to my NE about 300~400 = meters away, possible that is the source. However, the offending QRM = signals are not consistent in frequency or strength from one day to the = next. QRM signals are not very strong, but strong enough to interfere = with a -27 to -30 SNR desired signal. =20 I use a pair of crossed EWE antennas to have four-way selectable = cardio patterns for NE, SW, SE, and NW directional reception. If I = switch to the NW direction, the QRM signals go away, but then = directivity to DK7FC would be about 4~5dB down. To the SW and SE = directions some QRM sources disappear, and other QRM sources appear. I = may try some phase steering between the two EWE antennas. It is an = ongoing learning process. Random chance could always prevail, so I = continue to listen, tinker, and occasionally even learn something ~:). = 73,=20 Mike wa3tts PS: I have received several F5WK wspr2 captures on 630m this last = December.... https://www.dropbox.com/s/wkfcl9gfyac5nlm/F5WKMAP.JPG?dl=3D0 https://www.dropbox.com/s/fzox0bk492h20dq/IMG_4142.JPG?dl=3D0 ----- Original Message ----- a From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, May 30, 2015 6:20 AM Subject: Re: LF: Almost Looks like Stefan ran into a Loran line... but wait, Loran is no = longer there in North America, and anyway we're on MF not LF. Mike any = idea what is causing those spurs? https://dl.dropboxusercontent.com/s/hferguh5tdeaccw/IMG_4352.JPG = (direct link) 73, Markus (DF6NM) From: Michael Sapp=20 Sent: Saturday, May 30, 2015 4:41 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: Almost Stefan: Close, but no cigar..... local QRM..... https://www.dropbox.com/s/hferguh5tdeaccw/IMG_4352.JPG?dl=3D0 73 Mike wa3tts ------=_NextPart_000_0004_01D09B34.36BE7300 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Mike,
 
thanks for the explanations, nice = work indeed!=20
 
I am are also plagued by a lot of = local=20 interference from our dense suburban neighbourhood. especially on MF = there seems=20 to be a surprising diversity of signatures: there's the plain=20 common SMPS hash, usually 100 Hz = FM-modulated across several=20 kHz. At times I get what looks like just plain white = noise, with=20 variable power density. But then there are = also apparently=20 crystal controlled carriers going on and off, often with = sidebands which=20 sometimes mimick intelligent modulation.
 
Are you currently = monitoring=20 WSPR-2 only, or also -15?
 
All the best,
Markus (DF6NM)
Sent: Saturday, May 30, 2015 8:33 PM
Subject: Re: LF: Almost

Markus:  I do not think the QRM = signals are=20 spurious. I have built the W1VD preselector for 475~500 kHz range and = the=20 offending signals are still present when the preselector is used.  = Same=20 with the FZ-02 filter.  There are some commercial and retail shops = to my NE=20 about 300~400 meters away, possible that is the source.  However, = the=20 offending QRM signals are not consistent in frequency or strength from = one day=20 to the next.  QRM signals are not very strong, but strong enough to = interfere with a -27 to -30 SNR desired signal.   =
 
  I use a pair of crossed EWE = antennas to have=20 four-way selectable cardio patterns for NE, SW, SE, and NW directional=20 reception. If I switch to the NW direction, the QRM signals go away, but = then=20 directivity to DK7FC would be about 4~5dB down.  To the SW and SE=20 directions some QRM sources disappear, and other QRM sources = appear.  I may=20 try some phase steering between the two EWE antennas. It is an = ongoing=20 learning process. Random chance could always prevail, so I continue to = listen,=20 tinker, and occasionally even learn something ~:). 73,
 
Mike wa3tts
 
PS: I have received several  F5WK = wspr2=20 captures on 630m this last December....
 
htt= ps://www.dropbox.com/s/wkfcl9gfyac5nlm/F5WKMAP.JPG?dl=3D0
ht= tps://www.dropbox.com/s/fzox0bk492h20dq/IMG_4142.JPG?dl=3D0
----- Original Message ----- a
From:=20 Markus=20 Vester
Sent: Saturday, May 30, 2015 = 6:20=20 AM
Subject: Re: LF: Almost

Looks like Stefan ran = into a Loran=20 line... but wait, Loran is no longer there in North America, and = anyway=20 we're on MF not LF. Mike any idea what is causing those = spurs?
 
https://dl.dropboxusercontent.com/s/hferguh5tdeaccw/IMG_4352.JPG&nbs= p;(direct=20 link)
 
73, Markus (DF6NM)

From: Michael Sapp
Sent: Saturday, May 30, 2015 4:41 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: LF: Almost

Stefan: Close, but no cigar..... = local=20 QRM.....
 
ht= tps://www.dropbox.com/s/hferguh5tdeaccw/IMG_4352.JPG?dl=3D0
 
73 Mike wa3tts
 
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