Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh01.r1000.mx.aol.com (Internet Inbound) with ESMTP id C23C5380001A9; Sat, 15 Oct 2011 12:45:25 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RF7L2-00006h-Kk for rs_out_1@blacksheep.org; Sat, 15 Oct 2011 17:43:56 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RF7L1-00006Y-U6 for rsgb_lf_group@blacksheep.org; Sat, 15 Oct 2011 17:43:55 +0100 Received: from filter02.i-online.fr ([195.200.78.9]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RF7L0-0008QL-8d for rsgb_lf_group@blacksheep.org; Sat, 15 Oct 2011 17:43:55 +0100 Received: from smtp.qtxt.dns-iol.com ([195.200.78.13]) by filter02.i-online.fr (IceWarp 10.2.2) with ESMTP (SSL) id YAG26624 for ; Sat, 15 Oct 2011 18:43:24 +0200 Received: (qmail 19915 invoked by uid 507); 15 Oct 2011 18:43:41 +0200 Received: from unknown (HELO ?192.168.1.101?) (john.rabson@numeo.fr@217.67.155.178) by smtp.qtxt.dns-iol.com with SMTP; 15 Oct 2011 18:43:41 +0200 Mime-Version: 1.0 (Apple Message framework v1084) From: John Rabson In-Reply-To: <4E997913.8090104@iup.uni-heidelberg.de> Date: Sat, 15 Oct 2011 18:43:46 +0200 Message-Id: <9D54B5BB-28A1-409E-8D5E-BB6DDF91B856@numeo.fr> References: <4E956D89.6080102@iup.uni-heidelberg.de> <4E97032B.30905@iup.uni-heidelberg.de> <4E997913.8090104@iup.uni-heidelberg.de> To: rsgb_lf_group@blacksheep.org X-Mailer: Apple Mail (2.1084) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=iso-8859-1 Subject: Re: LF: noise on VK and earth dipole tests Content-Transfer-Encoding: quoted-printable 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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:460913056:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60d54e99b8a50010 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none On 15 Oct 2011, at 14:14CEST, Stefan Sch=E4fer wrote: > Hello Dimitris, >=20 > I think the 450 Ohm you get is mostly caused by the earth electrode = resistance. So if you spend e.g. 2 instead of one earth rod, maybe you = can get a 3 dB improvement? The more the better up to 6 or 7 rods. =46rom cave radio tests we find that the earth rods need to be spaced by = 2 or more times their depth. John F5VLF