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 wBUNjcD5002167 for ; Mon, 31 Dec 2018 00:45:39 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gdkhQ-0004yS-PC for rs_out_1@blacksheep.org; Sun, 30 Dec 2018 23:40:52 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gdkhK-0004yJ-P7 for rsgb_lf_group@blacksheep.org; Sun, 30 Dec 2018 23:40:46 +0000 Received: from simba.netcom.co.uk ([185.53.59.69]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gdkhI-0001zf-29 for rsgb_lf_group@blacksheep.org; Sun, 30 Dec 2018 23:40:45 +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:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=fIVqE+ahggfqM8NAAQCMJzStBosoBLgOFq4qcJ0GWaA=; b=a5G2Lr26G7YSTxhrzHmsc6vmk3 GW9KH0uvrE0hStrGzQPElE0b+blx9fvA2fw9o0qp1FHc75T1+Hib2GEAQqhULbbEaorLp6pWlTWV/ GY65PvOthiusMO2te5fprpWPPvPGAbFben4aByyzhydQCYZlOZcUWQx9U6PhL7tL4+b0=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:59425 helo=pn.abelian.org) by simba.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1gdkhH-0008Pe-0X for rsgb_lf_group@blacksheep.org; Sun, 30 Dec 2018 23:40:43 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 31407400044 for ; Sun, 30 Dec 2018 23:40:22 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <976652757.10789891.1546166793929.ref@mail.yahoo.com> <976652757.10789891.1546166793929@mail.yahoo.com> <5C28AE1C.1020707@posteo.de> <5C293558.6010606@posteo.de> From: Paul Nicholson Message-ID: <5f6299f1-259c-f75f-8e8d-3ecddd824847@abelian.org> Date: Sun, 30 Dec 2018 23:40:22 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <5C293558.6010606@posteo.de> Content-Language: en-US X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - simba.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: simba.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: simba.netcom.co.uk: catchall@abelian.org X-Source: X-Source-Args: X-Source-Dir: X-Spam-Score: -0.7 (/) 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 @@CONTACT_ADDRESS@@ for details. Content preview: Best I can manage here is 11.9 dB S/N in 139uHz from the 9nV/m E-field signal. A little over 2 electrons on the antenna. http://abelian.org/vlf/tmp/181230a.gif The pipeline uses Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [185.53.59.69 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 4e3b1488273adbbe9757d6bdd5adf219 Subject: Re: ULF: Carrier on 2970.01 Hz 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 Best I can manage here is 11.9 dB S/N in 139uHz from the 9nV/m E-field signal. A little over 2 electrons on the antenna. http://abelian.org/vlf/tmp/181230a.gif The pipeline uses vtfilter -h bp,f=2470,w=1600 -a th=5 and vtblank -a25 -d0 -t100 which gives a drop factor of only 0.8%. With daytime sferics at this frequency there is little for the blanker to blank. It is mostly dropping mains-asynchronous switching pulses from the DC supply. E-field only reception for this. The H-field rx is not working very well at this frequency, the noise floor is a few dB higher. A combination, I think, of mains sidebands and interference from the DC supply. Somewhere on my workbench are the parts for a new 48V DC supply with much better isolation. I think this is actually a record distance for carrier detection without stacking. -- Paul Nicholson --