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 x379C5mI029718 for ; Sun, 7 Apr 2019 11:12:14 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1hD3lA-0000re-2j for rs_out_1@blacksheep.org; Sun, 07 Apr 2019 10:06:40 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1hD3l7-0000rV-1k for rsgb_lf_group@blacksheep.org; Sun, 07 Apr 2019 10:06:37 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1hD3l5-0001x7-AC for rsgb_lf_group@blacksheep.org; Sun, 07 Apr 2019 10:06:35 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id E06362400E6 for ; Sun, 7 Apr 2019 11:06:33 +0200 (CEST) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1554627993; bh=/b98nsuJ/X+bYvDo+h7/sg2qGWHzd1RPorKJyjeaAcg=; h=Date:From:To:Subject:From; b=DwsmKC5DE0xY/CTyDL3O/RpxQd4g/B2t2Yx3unPt8zb1dYLpjwiitqA0WPPRrUNjs 1f4U84UB2C3xGpXd7WB58F+daGuZ60ZvHLdAIP1yZC9vbbWbl14X028x7DzzRFnacF HhDK6Db4/3f9Cwy8hBYaSq0WhxEHWdUHkFY4kY/WymhXGQUiVH/0q+qR+smvf7Arff /3O7bGpOlFkK+UIKbYDuUm1cwRbi5XtdcT89V6IIAzC42wNgc1kVCX+vtUsVSu1XHA B1iLxEFg64Zc3eI+kTBumQNCzNUkiEqwR+NaQwGjOyRgCzLnOAgYg00SDuBG38eLqk CvAhDP/D8J3XA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 44cSN92S2Xz9rxD for ; Sun, 7 Apr 2019 11:06:33 +0200 (CEST) Message-ID: <5CA9BD98.2030002@posteo.de> Date: Sun, 07 Apr 2019 11:06:32 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <1652663722.1033558.1554575549616.ref@mail.yahoo.com> <1652663722.1033558.1554575549616@mail.yahoo.com> <5CA90E98.2070707@posteo.de> <8c46744b-f60a-ca91-f60f-97a2f5f7b11f@abelian.org> <5CA931D4.6050908@posteo.de> <83eece37-ae11-b2fd-917c-ad29c350695b@abelian.org> In-Reply-To: <83eece37-ae11-b2fd-917c-ad29c350695b@abelian.org> X-Spam-Score: -2.3 (--) 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: Am 07.04.2019 07:17, schrieb Paul Nicholson: > > Perhaps also the longest ground loop antenna used for > amateur transmission? You never know. I can imagine that a few more people used similar antennas, but most likely not in combination with coherent signalling and modern modes such as EbNaut, and with so much power and opti [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.66 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-Scan-Signature: 5c1f37c04fc013ebbc2288fd3791d043 Subject: Re: ULF: EbNaut message transmitted from ground loop 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=0.0 required=5.0 tests=none 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 Am 07.04.2019 07:17, schrieb Paul Nicholson: > > Perhaps also the longest ground loop antenna used for > amateur transmission? You never know. I can imagine that a few more people used similar antennas, but most likely not in combination with coherent signalling and modern modes such as EbNaut, and with so much power and optimised efficiency. Some people may have done local tests (< 5 km) in CW or use audio (music, voice) to cross some 100m, partly with metallic underground infrastructure (water pipes...) to support propagation. I bet there has not been anything beyond 20 km distance, and not at all something international. An OM (OT!) of my radio club told stories of his early radio experiments. He had a friend in some 100m distance and they lay out a small hidden wire into they ground between their QTHs, using the earth as the back 'wire'. They communicated over that wire which is nice :-) But first you need someone who's interested to do something like that. Nowadays you may need some more wire to find the next QSO partner :-) 73, Stefan