Return-Path: Received: from mtain-df11.r1000.mx.aol.com (mtain-df11.r1000.mx.aol.com [172.29.64.223]) by air-dc05.mail.aol.com (v126.13) with ESMTP id MAILINDC053-86514b58e6db61; Thu, 21 Jan 2010 18:44:27 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-df11.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6500538000090; Thu, 21 Jan 2010 18:44:25 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NY6gE-0000Fq-EJ for rs_out_1@blacksheep.org; Thu, 21 Jan 2010 23:43:14 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NY6gD-0000Fa-Uw for rsgb_lf_group@blacksheep.org; Thu, 21 Jan 2010 23:43:13 +0000 Received: from lnx500.hrz.tu-darmstadt.de ([130.83.156.225]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NY6gB-0001BH-IV for rsgb_lf_group@blacksheep.org; Thu, 21 Jan 2010 23:43:13 +0000 Received: from FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de (File-Server-HST.hst.e-technik.tu-darmstadt.de [130.83.212.129]) by lnx500.hrz.tu-darmstadt.de (8.14.2/8.14.2/HRZ/PMX) with SMTP id o0LNh80d003542 for ; Fri, 22 Jan 2010 00:43:09 +0100 (envelope-from schaefer@hst.tu-darmstadt.de) Received: from [127.0.0.1] (helo=File-Server-HST.hst.e-technik.tu-darmstadt.de) by FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de with AVK MailGateway; for ; Fri, 22 Jan 2010 00:43:08 +0100 Content-class: urn:content-classes:message MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Fri, 22 Jan 2010 00:39:04 +0100 Message-ID: <38A51B74B884D74083D7950AD0DD85E82A1AA1@File-Server-HST.hst.e-technik.tu-darmstadt.de> X-MS-Has-Attach: X-MS-TNEF-Correlator: <38A51B74B884D74083D7950AD0DD85E82A1AA1@File-Server-HST.hst.e-technik.tu-darmstadt.de> Thread-Topic: ERP<>EMRP Thread-Index: Acqa0Fq5w+pUi4DKSW+jf170wx7dfQAIo/tE References: <9afca2641001210904h7d2b276dv503b55075ce9313@mail.gmail.com><007501ca9acc$e78e29a0$0301a8c0@your91hoehfy9g> From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= To: X-AVK-Virus-Check: AVB 19.692;21.01.2010 X-PMX-TU: seen v0.99a by 5.5.8.383112, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.1.21.232720 X-PMX-SPAMCHECK: outgoing mail X-Karma: unknown: X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=disabled,SUBJ_ALL_CAPS=1.166 Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01CA9AF3.7C226F07" Subject: LF: ERP<>EMRP X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=SUBJ_ALL_CAPS 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-VSS-INFO: 5400.1158/53768 X-AOL-VSS-CODE: Scan Clean x-aol-sid: 3039ac1d40df4b58e6d96a0d X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) ------_=_NextPart_001_01CA9AF3.7C226F07 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Andy,=20 =20 Isn't it, the ERP is I^2*Rrad*1,83, if we assume a vertical antenna? =20 73, Stefan ________________________________ Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Andy Talbot Gesendet: Do 21.01.2010 20:27 An: rsgb_lf_group@blacksheep.org Betreff: Re: LF: Re: M0BMU - any chance of some new ERP estimates please? So go on: argue against the Rrad (an exact figure derived from basic elec= tromag theory) and Rloss (easily measurable, called Ohms law) way of getti= ng antenna efficiency. =20 =20 Or ERP =3D I^2 . Rrad where I is measurable. =20 Only uncertainty in any of these techniques is the effective height of the= antenna used to get Rrad, but absolute worst case, can only ever lead to= 6dB error. The difference between no top hat and an infinite top hat Andy www.g4jnt.com =20 ------_=_NextPart_001_01CA9AF3.7C226F07 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: base64 eJ8+IgkXAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEgAEADgAAAExGOiBFUlA8PkVNUlAAgQMB BYADAA4AAADaBwEAFgAAACcABAAFACgBASCAAwAOAAAA2gcBABYAAAArAAgABQAwAQEJgAEAIQAA AEEyNDFEODg4MDVEQjM2NDlCNDgwRjMyRDhCRUY0Nzc4ADEHAQOQBgAwDwAAOAAAAAMANgAAAAAA QAA5AJ9zqerymsoBHgA9AAEAAAAFAAAATEY6IAAAAAACAUcAAQAAADIAAABjPURFO2E9IDtwPUhT VDtsPUZJTEUtU0VSVkVSLUgtMTAwMTIxMjM0MzA4Wi0xNzgyAAAAHgBJAAEAAABBAAAAUmU6IExG OiBSZTogTTBCTVUgLSBhbnkgY2hhbmNlIG9mIHNvbWUgbmV3IEVSUCBlc3RpbWF0ZXMgcGxlYXNl PwAAAABAAE4AgGF+zc+aygEeAFoAAQAAACMAAABvd25lci1yc2diX2xmX2dyb3VwQGJsYWNrc2hl ZXAub3JnAAACAVsAAQAAAGMAAAAAAAAAgSsfpL6jEBmdbgDdAQ9UAgAAAABvd25lci1yc2diX2xm X2dyb3VwQGJsYWNrc2hlZXAub3JnAFNNVFAAb3duZXItcnNnYl9sZl9ncm91cEBibGFja3NoZWVw 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