Return-Path: Received: from rly-mh10.mx.aol.com (rly-mh10.mail.aol.com [172.21.166.146]) by air-mh03.mail.aol.com (v121_r4.6) with ESMTP id MAILINMH031-c004946d3823b5; Mon, 15 Dec 2008 17:00:43 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mh10.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMH108-c004946d3823b5; Mon, 15 Dec 2008 17:00:36 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LCLUC-0008Dv-D9 for rs_out_1@blacksheep.org; Mon, 15 Dec 2008 22:00:20 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LCLUB-0008Dm-V1 for rsgb_lf_group@blacksheep.org; Mon, 15 Dec 2008 22:00:19 +0000 Received: from cavuit02.kulnet.kuleuven.be ([134.58.240.44]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LCLUA-0002fp-WF for rsgb_lf_group@blacksheep.org; Mon, 15 Dec 2008 22:00:19 +0000 Received: from smtps02.kuleuven.be (smtpshost02.kulnet.kuleuven.be [134.58.240.75]) by cavuit02.kulnet.kuleuven.be (Postfix) with ESMTP id EA3F551C011 for ; Mon, 15 Dec 2008 23:00:06 +0100 (CET) Received: from smtps02.kuleuven.be (localhost [127.0.0.1]) by smtps02.kuleuven.be (Postfix) with ESMTP id 7D5F5F3863 for ; Mon, 15 Dec 2008 23:00:06 +0100 (CET) Received: from webmail2.cc.kuleuven.ac.be (webmail2.cc.kuleuven.ac.be [134.58.242.4]) by smtps02.kuleuven.be (Postfix) with ESMTP id 73B67F3862 for ; Mon, 15 Dec 2008 23:00:06 +0100 (CET) Received: by webmail2.cc.kuleuven.ac.be (Postfix, from userid 65534) id BB9B25ADE; Mon, 15 Dec 2008 23:00:06 +0100 (CET) Received: from 66.167-240-81.adsl-dyn.isp.belgacom.be (66.167-240-81.adsl-dyn.isp.belgacom.be [81.240.167.66]) by webmail4.kuleuven.be (Horde MIME library) with HTTP; Mon, 15 Dec 2008 23:00:06 +0100 Message-ID: <20081215230006.xpw1rjwmj7cw40co@webmail4.kuleuven.be> Date: Mon, 15 Dec 2008 23:00:06 +0100 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: rsgb_lf_group@blacksheep.org References: <002901c95e97$87b3f400$0301a8c0@mal769a60aa920> <004001c95ea5$b34c32e0$8d01a8c0@JAYDELL> <006601c95ea8$c07ffde0$0301a8c0@mal769a60aa920> <57a24ca70812150800w249cb152wf212a2566f607fb0@mail.gmail.com> <009001c95ed1$feba2e40$0301a8c0@mal769a60aa920> <20081215164355.8DCA5F3862@smtps02.kuleuven.be> <00b201c95ee2$813c91e0$0301a8c0@mal769a60aa920> <20081215214048.ycybajir85s84kcw@webmail4.kuleuven.be> <20081215214925.6ea23758@lurcher.twatt.local> In-Reply-To: <20081215214925.6ea23758@lurcher.twatt.local> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Internet Messaging Program (IMP) H3 (4.1.2) X-Originating-IP: 81.240.167.66 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: Re: 500/137 XBAND QSO Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes"; 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) John, >> > 1/4 wave inv L at over 100 ft high. > >> The radiation resistance of this antenna must be about 5 Ohm, with a >> loss resistance of 20 Ohm the efficiency is 25%. > > So I guess a TX power no greater than 4W would be sufficient to meet > the 1W ERP limit? If you take the gain of a marconi antenna over a dipole into account 2.2W would do the job. 73, Rik ON7YD Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm