Return-Path: Received: from mtain-me03.r1000.mx.aol.com (mtain-me03.r1000.mx.aol.com [172.29.96.139]) by air-df03.mail.aol.com (v127_r1.1) with ESMTP id MAILINDF034-5eed4bacff99249; Fri, 26 Mar 2010 14:40:25 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-me03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1778A38000086; Fri, 26 Mar 2010 14:40:12 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NvEQR-0007lU-Qw for rs_out_1@blacksheep.org; Fri, 26 Mar 2010 18:38:31 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NvEQR-0007lL-FG for rsgb_lf_group@blacksheep.org; Fri, 26 Mar 2010 18:38:31 +0000 Received: from smtp101.sbc.mail.re3.yahoo.com ([66.196.96.84]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1NvEQP-0000Dg-DA for rsgb_lf_group@blacksheep.org; Fri, 26 Mar 2010 18:38:31 +0000 Received: (qmail 16397 invoked from network); 26 Mar 2010 18:38:21 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=snet.net; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Reply-To:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:In-Reply-To:Importance:X-MIMEOLE; b=FsUQygK2LgJBc63W1zV/kQr523ifh9zfKg5fGN7N7APTzSsEaxa1GqicfeGmnAi7daSV8bu0IrGHg+Z1lDhdsF9hfxkN1cApd6AF8QuuOTeYAgFC5lEjY36Y7h7+X8HNjPXZ0RkI5MwlVhg69R2XKXEP0v/D+pA8rvtMFGXfRqg= ; Received: from MAINDESK (paulc@76.192.4.59 with login) by smtp101.sbc.mail.re3.yahoo.com with SMTP; 26 Mar 2010 11:38:20 -0700 PDT X-Yahoo-SMTP: .XXmOBOswBCkuxW404eTLsnd.RdCQPge3WAF X-YMail-OSG: F.Zb6hgVM1kPXBtbgy_4ZywXUILFc3Xc__Y1k9ZDj_FWc_AUzoLus.a0V3ZnZCkBfHbbO.h4aFD8dzb_3DxLeEGcpSyFSF54YCTiv3KzFdGaRViUbGWzoiIIaJDG2GIwv91frxtHzF5Gl2Mu4tkxKkqr4O08BnbiU4PXmkNrZ97UTfSLdBz.q0dMIBbmY3WQRz7g_2_iaybQF3KnCZvvf6va5vlt53C4hyy_kHZ9MJkIwRl_HE_OVN99wfsEoeO8keztgaNLqdoaHRK5tJRV0M0HBYAo4OxSzLqRNOF5g.1ZZgWd3EaSm90CvdWyt5IJJTh3jbUYbqte3rgZDOAa46eAFnKO3_wuEBonTS2jX.Lc4XSzrGLcqk7PpG7pNR.vJcvFHEZT X-Yahoo-Newman-Property: ymail-3 From: "Paul A. Cianciolo" To: Date: Fri, 26 Mar 2010 14:38:22 -0400 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: <4BAC6F82.5020300@abelian.org> Importance: Normal X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 DomainKey-Status: good (testing) X-Spam-Score: 0.9 (/) X-Spam-Report: autolearn=disabled,DNS_FROM_RFC_WHOIS=0.879,UNPARSEABLE_RELAY=0.001 Subject: LF: Question about ground impedance at 8.97 KHZ Stefan. Content-Type: text/plain; charset="utf-8" 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-sid: 3039ac1d608b4bacff8c1039 X-AOL-IP: 193.82.116.20 Hello All, Below is a quote from the Stefan's web page concerning his latest "Dre= amers Band" DX contact Congratulations again Stefan. >From this information alone is it possible to calculate or know the an= tenna system impedance. "100m Vertical wire antenna, coil/antenna voltage was abt 15kV rms, av= erage antenna current about 480mA, giving up to 1,7mW ERP. Applied pow= er was up to 250W." Pertaining to the coil "Technical and mechanical data: L=3D553mH, Q=3D= 82, R(DC)=3D283 Ohm; 0,4mm diameter enameled copper wire, about 1200= turns! Average diameter 0,55m, height abt 0,5m. So, about 2000m wire!= :-)" I have built a small impedance bridge that operates at 10 KHZ and show= s my sloping 170' wire as 70K Ohms. I can also see approx 500 PF that= can be nulled out using the bridge? Can the 70K value possibly be correct? (3) 6' ground rods about 6'= apart are the ground... plus the electrical ground of the house. I am hoping to attempt a local transmission on 9KHZ=20 Any information would be helpful. Thank you Paul W1VLF