Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.6 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,URIBL_SBL,URIBL_SBL_A autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v3Q6epHq007055 for ; Wed, 26 Apr 2017 08:40:52 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d3GZd-0005cD-O4 for rs_out_1@blacksheep.org; Wed, 26 Apr 2017 07:37:13 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d3GZV-0005bw-Q3 for rsgb_lf_group@blacksheep.org; Wed, 26 Apr 2017 07:37:05 +0100 Received: from smtp-out-6.talktalk.net ([62.24.135.70]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d3GZS-0007AY-1p for rsgb_lf_group@blacksheep.org; Wed, 26 Apr 2017 07:37:04 +0100 Received: from [192.168.1.3] ([78.150.101.242]) by smtp.talktalk.net with SMTP id 3GZQdhu1agKst3GZQdZ9vh; Wed, 26 Apr 2017 07:37:00 +0100 X-Originating-IP: [78.150.101.242] X-Spam: 0 X-OAuthority: v=2.2 cv=GdBVpkfL c=1 sm=1 tr=0 a=zSPPKdXLYhWsOVDzq1e+mg==:117 a=zSPPKdXLYhWsOVDzq1e+mg==:17 a=Q9fys5e9bTEA:10 a=nN7BH9HXAAAA:8 a=EhEf3aJDSOCe-s5PauIA:9 a=PUjeQqilurYA:10 a=wygtsRLyp0gA:10 To: rsgb_lf_group@blacksheep.org References: <15b9cb3d038-73bd-386c8@webprd-m70.mail.aol.com> <58FDFB35.4090808@posteo.de> From: g3zjo Message-ID: Date: Wed, 26 Apr 2017 07:37:01 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.0.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-GB X-Antivirus: Avast (VPS 170425-2, 25/04/2017), Outbound message X-Antivirus-Status: Clean X-CMAE-Envelope: MS4wfCrQCohVSxvpVbd0PmNYuunpMtNhiCWq+ht6RH0q2yn+NkaBxaj456qlM++ekY1XjAIRqOcCBkY7Bb7NnMVl7ACkBv8zsXoksDMfq4jL3FfyEOG1ucG+ rjXSMKFn4QHnOzalQEOdH9XyYSFsG1rydAJI2u4xykAup/RudWGF58xpb2uPjke7bnBJ+qNlH9c8eQ== X-Scan-Signature: f62c7cf8eeb8e5a327b71719e9bffff1 Subject: Re: LF: Re[2]: VLF: New carrier on 6470.005 Hz Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Transfer-Encoding: 7bit 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 2.75 Status: RO X-Status: X-Keywords: X-UID: 11487 Hi Jacek / VLF On 24/04/2017 16:08, Jacek Lipkowski wrote: > Eddie (at 750km distance) and especially Markus (at 180km) can't receive. > > The only other explanation (apart from lower qrm levels) might be the > software used. QRM. Stefan suggested running a 366mHz spectrogram at 6470 Hz, see http://www.g3zjo.talktalk.net/vlfgrabber.htm VLF2. The bands of QRM are unstable spaced every 100Hz still visible at 8 kHz I have seen a strong harmonic drift up to 6470 Hz. The signal strength varies giving the appearance of having some propagation characteristics. Present from <>= 05:30 to 00:00, boiler, heating controller, smart metering ? Closest to my antenna, to the South, is a single story, special needs home, I assume they have resident staff, they may spring into life early in the morning. I like to blame them for at least some of the unexplained QRM. I have never had contact with them in over 30 years, despite being only 20 m or so from my antenna there is little of the building visible, going to visit them would take a journey of around 0.5km and two private access roads. I have sent my immediate closest neighbour to the North away for a few days, his usual band of QRM has gone with him :-) 73 Eddie G3ZJO