Return-Path: Received: from rly-mb06.mx.aol.com (rly-mb06.mail.aol.com [172.21.131.164]) by air-mb03.mail.aol.com (v125.7) with ESMTP id MAILINMB033-d0f4aa4d1cd189; Mon, 07 Sep 2009 05:26:55 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mb06.mx.aol.com (v125.7) with ESMTP id MAILRELAYINMB063-d0f4aa4d1cd189; Mon, 07 Sep 2009 05:26:38 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MkaTg-00027q-Pd for rs_out_1@blacksheep.org; Mon, 07 Sep 2009 10:25:36 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MkaTg-00027h-D6 for rsgb_lf_group@blacksheep.org; Mon, 07 Sep 2009 10:25:36 +0100 Received: from sighthound.demon.co.uk ([80.177.174.126]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MkaTY-0002vL-5O for rsgb_lf_group@blacksheep.org; Mon, 07 Sep 2009 10:25:30 +0100 Received: from [10.218.2.200] (saluki-vpn.twatt.home [10.218.2.200]) by deerhound.twatt.home (Postfix) with ESMTP id 071E43B507 for ; Mon, 7 Sep 2009 09:25:24 +0000 (UTC) Message-ID: <4AA4D150.9050402@sighthound.demon.co.uk> Date: Mon, 07 Sep 2009 09:24:32 +0000 From: John P-G User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <004601ca2f94$35f51580$0201a8c0@home> In-Reply-To: <004601ca2f94$35f51580$0201a8c0@home> X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: ??? Content-Type: text/plain; charset=ISO-8859-1; 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 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Chris wrote: > ....and how does 'Jacking up' the antenna increase the ERP? > Chris, G4AYT. Chris,LF, Presumably by increasing the height one increases the capacity and the the radiation resistance and thus the ERP will rise for a given TX power and antenna current? One probably also reduces the loss resistance too, due to needing less loading L, so the current might also increase, leading to yet more ERP for a fixed TX power. John GM4SLV