Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id vB2D9FE5011996 for ; Sat, 2 Dec 2017 14:09:18 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eL7S9-0002b2-Fg for rs_out_1@blacksheep.org; Sat, 02 Dec 2017 13:03:33 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eL7S8-0002at-7F for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2017 13:03:32 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eL7S4-0000zS-MG for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2017 13:03:30 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Date: Message-ID:Subject:From:To:Sender:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=OfSFU7r+Omzk1lNsdcweMVe6Lw+85d7VFG+NC0t61as=; b=DNjNxdVXhglesCeD0SLoSXbS0d Bh7c4zE4rcaJbUwuzz6doFabfYqOt8gU7Dcx3EkHNGuzorweYrK4aIXMDjn/2vp7AHZwWUS1ah3+9 ywtAqw2z0QCzbM157CaKm383VVcwlFoEkUZYPx3Q6CVqTkn+LEm9zm+jtkQib+BsFkNo=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:45951 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eL7S2-0005n1-PX for rsgb_lf_group@blacksheep.org; Sat, 02 Dec 2017 13:03:26 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 246F1400215 for ; Sat, 2 Dec 2017 13:03:26 +0000 (UTC) To: rsgb_lf_group@blacksheep.org From: Paul Nicholson Message-ID: Date: Sat, 2 Dec 2017 13:03:26 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 Content-Language: en-US X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Dex surprised me last night with a carrier on 8540 Hz, GPS-locked and the ERP would be circa 100uW. Tx was stable from 21:25, detectable in the UK by 22:30, and a good overnight signal until 03:00 when Dex planned to switch off. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: e6de17d69e46ff4ea8db042ef2cd7e46 Subject: LF: W4DEX at 8540 Hz in Todmorden Content-Type: text/plain; charset=utf-8; format=flowed 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=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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 Dex surprised me last night with a carrier on 8540 Hz, GPS-locked and the ERP would be circa 100uW. Tx was stable from 21:25, detectable in the UK by 22:30, and a good overnight signal until 03:00 when Dex planned to switch off. http://abelian.org/vlf/tmp/171202a.gif Signal about 0.1fT and 30nV/m, about 30 electrons worth of charge on the new E-field antenna. Anything with double figures is a good amateur signal! H-field: -27.7 dB in 1Hz, phase -109.4 deg; E-field: -26.0 dB in 1Hz, phase -108.1 deg; It's not unusual for the new E-field rx to do better than the loop rx. Looks like I need to hurry up with the upgrade to the H rx! I've cleared bench space for the replacement and parts are on order. I measured the bearing using three different methods: Watson-Watt goniometry: 273.1 deg Poynting vector: 287.5 deg Tsuruda/Hayashi NPE: 282.3 deg The great circle bearing is actually 284.6 deg. NPE should be the most accurate method - no polarisation error but relies on precise relative phase measurements between the three channels. -- Paul Nicholson --