X-GM-THRID: 1216474328156915870 X-Gmail-Labels: rsgb lf X-Gmail-Received: a53cb55f0ee30e4b95e1948e989b48dcb147bab2 Delivered-To: daveyxm@gmail.com Received: by 10.78.185.17 with SMTP id i17cs136773huf; Fri, 6 Oct 2006 04:38:13 -0700 (PDT) Received: by 10.67.100.12 with SMTP id c12mr3111175ugm; Fri, 06 Oct 2006 04:38:13 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id e23si2077066ugd.2006.10.06.04.38.12; Fri, 06 Oct 2006 04:38:13 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1GVnwr-0000zC-6u for rs_out_1@blacksheep.org; Fri, 06 Oct 2006 12:33:01 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1GVnwq-0000z3-SF for rsgb_lf_group@blacksheep.org; Fri, 06 Oct 2006 12:33:00 +0100 Received: from mxsf08.cluster1.charter.net ([209.225.28.208]) by relay1.thorcom.net with esmtp (Exim 4.62) (envelope-from ) id 1GVnwn-00028a-3W for rsgb_lf_group@blacksheep.org; Fri, 06 Oct 2006 12:33:00 +0100 Received: from mxip03a.cluster1.charter.net (mxip03a.cluster1.charter.net [209.225.28.133]) by mxsf08.cluster1.charter.net (8.12.11.20060308/8.12.11) with ESMTP id k96BWh0O027501 for ; Fri, 6 Oct 2006 07:32:48 -0400 Received: from 24-177-53-244.dhcp.oxfr.ma.charter.com (HELO [127.0.0.1]) ([24.177.53.244]) by mxip03a.cluster1.charter.net with ESMTP; 06 Oct 2006 07:32:44 -0400 X-IronPort-AV: i="4.09,272,1157342400"; d="scan'208"; a="789456024:sNHT22284520" Message-ID: <4526310D.3010902@w1tag.com> Date: Fri, 06 Oct 2006 11:33:49 +0100 From: John Andrews User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000701c6e8f1$aff10b10$6801a8c0@Radio> <00c901c6e919$dd77ada0$e9ce28c3@captbrian> In-Reply-To: <00c901c6e919$dd77ada0$e9ce28c3@captbrian> X-Spam-Score: -0.5 (/) X-Spam-Report: autolearn=disabled,AWL=-0.484 Subject: Re: LF: Re: erp ierp VY1JA 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 Status: O X-Status: X-Keywords: X-UID: 4034 Bryan, As others have pointed out, the "I" is for isotropic, a theoretical radiator that sends the same signal in all directions. A 3-D model of the radiation pattern would be a sphere. The far field of a dipole has no signal off the ends, and hence has gain in the favoured direction (at right angles to the dipole). The 3-D model would be a donut (without chocolate frosting). John A. captbrian wrote: > What is I in IERP ?