Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=4 Fuz1=4 Fuz2=4 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v6B6dmpj010132 for ; Tue, 11 Jul 2017 08:39:50 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dUofw-0001p1-4k for rs_out_1@blacksheep.org; Tue, 11 Jul 2017 07:29:36 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dUofu-0001os-AL for rsgb_lf_group@blacksheep.org; Tue, 11 Jul 2017 07:29:34 +0100 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 1dUofp-0006oH-10 for rsgb_lf_group@blacksheep.org; Tue, 11 Jul 2017 07:29:32 +0100 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:To:References:Reply-To:Subject:Sender: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=SLMqDTuXAkt9uJTdgy+eeqrSrZ6O2aMr+EDTKEmmKfc=; b=byvxfOihIYhG5ln2d2IkdIKQ6c AcQKsLc99UNQo8jyo4lYRKwm2Qwk0a6tiv4xYRuJ/HqO2ewI1ZTb7o83sABA67AhLzJ7AuuOSwOU0 ZcisrrgHhQoMq/geYLCFLuAb4xlry+0U72jVowOL7nb0E1OeKQxt2GaMCywXHWMoTMjU=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:49790 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 1dUofm-0001Tc-Jx for rsgb_lf_group@blacksheep.org; Tue, 11 Jul 2017 07:29:26 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 39EF94001B4 for ; Tue, 11 Jul 2017 06:29:24 +0000 (UTC) References: <594D2630.3000709@posteo.de> <15cd91cc8cc-d71-1057d@webprd-a66.mail.aol.com> <59512E45.6090701@posteo.de> <4dcecb3a-be19-ff99-866e-10c16762cacf@abelian.org> <1b13ce6b-d15a-973f-d6a5-3ef120314fd9@abelian.org> To: rsgb_lf_group@blacksheep.org From: Paul Nicholson Message-ID: <99a07f87-1dad-d96d-9079-8bf1e04cb1a0@abelian.org> Date: Tue, 11 Jul 2017 06:29:24 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <1b13ce6b-d15a-973f-d6a5-3ef120314fd9@abelian.org> 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-Scan-Signature: bb61bee384896e075004ae5ec954ddd2 Subject: Re: LF: Neo6M vs Neo7M Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit 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: 12212 Overnight run, http://abelian.org/vlf/tmp/170711a.gif and here is the mean absolute phase difference plotted over a range of time intervals, http://abelian.org/vlf/tmp/170711b.gif This shows the average difference between two phase measurements taken some interval apart. Looks like beyond about 25 seconds, it is about 0.14 degrees at 9765.625 Hz. It is unlikely to get any worse than this at longer intervals, being GPS locked. For a LO at say 130 kHz, it would be about 2 degrees. Good enough for coherent reception at LF I think. Amazing value for £17.00 and takes about 10 minutes to install and set up. -- Paul Nicholson --