Return-Path: Received: (qmail 46581 invoked from network); 17 Jul 2004 21:23:21 -0000 Received: from unknown (HELO ptb-spamcore01.plus.net) (192.168.71.1) by ptb-mailstore01.plus.net with SMTP; 17 Jul 2004 21:23:21 -0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore01.plus.net with esmtp (Exim 4.32; FreeBSD) id 1Blwg1-000MMN-QA for dave@picks.force9.co.uk; Sat, 17 Jul 2004 22:25:01 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BlweN-0001bb-Ne for dave@picks.force9.co.uk; Sat, 17 Jul 2004 21:23:19 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Blwe4-0000mH-Uy for rs_out_1@blacksheep.org; Sat, 17 Jul 2004 22:23:00 +0100 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Blwe4-0000m8-KM for rsgb_lf_group@blacksheep.org; Sat, 17 Jul 2004 22:23:00 +0100 Received: from imo-m23.mx.aol.com ([64.12.137.4]) by relay.thorcom.net with esmtp (Exim 4.34) id 1Blwe1-0006nc-7L for rsgb_lf_group@blacksheep.org; Sat, 17 Jul 2004 22:23:00 +0100 Received: from WarmSpgs@aol.com by imo-m23.mx.aol.com (mail_out_v37_r2.6.) id l.1f1.2576d366 (3842) for ; Sat, 17 Jul 2004 17:22:48 -0400 (EDT) From: WarmSpgs@aol.com Message-ID: <1f1.2576d366.2e2af2a7@aol.com> Date: Sat, 17 Jul 2004 17:22:47 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: AOL 4.0 for Windows 95 sub 120 X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=no,NO_REAL_NAME=0.285 Subject: Re: LF: Re: Re: RE: Feeding grounded tower on 136KHz Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) > Actually it may not be such a daft train of thought. Disconnect tower > grounding strap(s) - there should be at least one (inteded to "arrest" > lightning ?) > and check to see if tower really is "earthed" via foundations. Cannot endorse this idea! The tower *will* be earthed enough via its foundation(s) to cause significant loss to the radiated signal in any case, given the high RF voltages present on a resonated short antenna, but it will no longer be earthed well enough to provide a decent path for lightning currents. Apart from blasting one's rig to little charred pieces, and very possibly toasting the operator to a cinder, a lightning strike of sufficient peak current can fracture the foundation and allow the tower to fall.