Return-Path: X-Spam-DCC: paranoid 104; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u3RIsxLd030974 for ; Wed, 27 Apr 2016 20:54:59 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1avUYg-0002ia-LG for rs_out_1@blacksheep.org; Wed, 27 Apr 2016 19:51:34 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1avUYg-0002iR-CU for rsgb_lf_group@blacksheep.org; Wed, 27 Apr 2016 19:51:34 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1avUYe-00043E-Sn for rsgb_lf_group@blacksheep.org; Wed, 27 Apr 2016 19:51:33 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id E1B9620C5D for ; Wed, 27 Apr 2016 20:51:31 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3qw8FH5wFkz5vN9 for ; Wed, 27 Apr 2016 20:51:31 +0200 (CEST) Message-ID: <57210A33.3030503@posteo.de> Date: Wed, 27 Apr 2016 20:51:31 +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: <571CF2AD.9030207@posteo.de> <571D2966.5080104@posteo.de> <571D3034.8020204@mbsks.franken.de> <571D31EE.9030106@posteo.de> <571DD4DE.3080703@abelian.org> <571E54B9.9010208@posteo.de> <571E5C16.2090102@mbsks.franken.de> <571E5F26.1080605@mbsks.franken.de> <571E92A0.3000608@posteo.de> <571E98A7.5070503@posteo.de> <571F87A2.7000700@abelian.org> <571FC3E8.1000706@posteo.de> <5720D81D.6020609@abelian.org> <5720E958.2010104@posteo.de> <5720F2DB.3030704@freenet.de> <5720FC67.7040001@abelian.org> In-Reply-To: <5720FC67.7040001@abelian.org> X-Scan-Signature: 59677119386dcf9f1872cb454dc1331d Subject: Re: VLF: A single turn RX loop for VLF 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 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7884 Hello Paul, Am 27.04.2016 19:52, schrieb Paul Nicholson: > You may also > find a lower thermal noise floor with few turns and > a transformer, compared with the same loop area and > many turns. Yes and i can imagine that there can be phase instabilities in the received signals if a multi turn loop is used, because the wind can move (bend) the loop a bit and so the internal capacity and hence the resonance is slightly changing. With this copper tube it is all quite stable. No need to buy a 'commercial' antenna, just some basic stuff / components are needed. 73, Stefan