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: : mailn 1480; 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+deb8u2) with ESMTP id v6PHarnr023840 for ; Tue, 25 Jul 2017 19:36:54 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1da3gU-0000PC-Kh for rs_out_1@blacksheep.org; Tue, 25 Jul 2017 18:31:50 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1da3gS-0000P3-KK for rsgb_lf_group@blacksheep.org; Tue, 25 Jul 2017 18:31:48 +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 1da3gP-00049h-OH for rsgb_lf_group@blacksheep.org; Tue, 25 Jul 2017 18:31:47 +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: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=wfcyjikiHA40046qidsym6o6yHslK2UMc/sY1U23Q1s=; b=IPgdxT/LbbWofv+2O9qTRpeR/m ORViIrt/pu6E4g7hI20Qy9k5gGa/pXDUCyrbUPPfARvYB1gemQoUZp8pOXIZ036EP7MC1AOe2J7kP pHIYGjJdttoQS6OAcYS1Wdf+prRUbd4lSfymh2K2lPrLOKhbWcMxX134aAHXYEg0e5DE=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:43538 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 1da3gM-0001hf-Gl for rsgb_lf_group@blacksheep.org; Tue, 25 Jul 2017 18:31:42 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id A7C3840023A for ; Tue, 25 Jul 2017 17:31:41 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: From: Paul Nicholson Message-ID: Date: Tue, 25 Jul 2017 17:31:41 +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: 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: 4d4a9e8f68fb15c54898568240f542c5 Subject: Re: LF: LF EbNaut Content-Type: text/plain; charset=utf-8; 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: 12294 Very nice Domenico. It is always fascinating to see a message come out of the noise. In fact it would still have 90% chance of decoding if it was 4dB weaker, and 45% if 5dB weaker. Much to be done at LF with coherent signalling. Here, just testing a new VLF E-field receiver/antenna with improved performance. Its response extends to 137 kHz and has noise floor 6nV/m in 1Hz at that frequency. -- Paul Nicholson --