Return-Path: Received: from rly-dd04.mx.aol.com (rly-dd04.mail.aol.com [172.19.141.151]) by air-dd04.mail.aol.com (v121_r4.4) with ESMTP id MAILINDD044-b72497cc9a0200; Sun, 25 Jan 2009 15:20:56 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dd04.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDD044-b72497cc9a0200; Sun, 25 Jan 2009 15:20:49 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LRBT2-0005Cv-Jh for rs_out_1@blacksheep.org; Sun, 25 Jan 2009 20:20:28 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LRBT2-0005Cm-6a for rsgb_lf_group@blacksheep.org; Sun, 25 Jan 2009 20:20:28 +0000 Received: from smtp-out-3.talktalk.net ([62.24.128.233] helo=smtp.talktalk.net) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LRBT1-0004ez-F7 for rsgb_lf_group@blacksheep.org; Sun, 25 Jan 2009 20:20:28 +0000 X-Path: TTSMTP X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApsEAFZYfElOlMYB/2dsb2JhbACEV8U1hUs Received: from unknown (HELO mal769a60aa920) ([78.148.198.1]) by smtp.talktalk.net with SMTP; 25 Jan 2009 20:20:21 +0000 Message-ID: <01fe01c97f2a$5914f730$0301a8c0@mal769a60aa920> From: "mal hamilton" To: References: <20090125092908.0aec06a4@lurcher> <002001c97f0a$cf16fac0$ae01a8c0@youry0mkaz8jaq> <20090125165335.47fc3399@lurcher> <7690F13DCE5D44BA8A5AA126607E7979@JimPC> <20090125180430.1d63e1c7@lurcher> <6449616DC58940A19C537A59F53828DA@AGB> <00d201c97f20$bd909520$6401a8c0@asus> <00d301c97f22$87d998d0$6401a8c0@asus> <20090125194232.05798210@lurcher> Date: Sun, 25 Jan 2009 20:20:21 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: WSPR 503.5 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original 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 In a MAN'S world its ERP that counts, it is more meaningful for LF/MF and it complies with the licence criteria. g3kev ----- Original Message ----- From: "Andy Talbot" To: Sent: Sunday, January 25, 2009 7:58 PM Subject: Re: LF: Re: WSPR 503.5 >I disagree - ERP is the licenced figure, and its what really matters > in the propagation tests. > > WSPR only allows a few values, with several dB between them, and it > really should be possible to get an estimat of antenna efficiency to > that sort of value. Rloss / calculated Rrad is easy enough to > measure. > > Andy G4JNT > www.g4jnt.com > > > > 2009/1/25 John P-G : >> On Sun, 25 Jan 2009 19:24:23 -0000 >> "Gary - G4WGT" wrote: >> >>> >>> When I make the calculation I will insert the correct figure. >>> >> Hello Gary, LF, >> >> I'm getting a fairly reliable signal from you, with just enough QSB to >> dip under the decoding margin from time to time. >> >> As to power reporting, I see that most people on LF/MF are attempting >> to estimate ERP, and use this figure in the beacon data. >> >> There was much discussion on the WSPR forum on the merits or otherwise >> of this approach, in the HF sphere at least. >> >> It might be easier if we adopted the same approach as is recommended >> for HF use - to report the actual TX power, not ERP. >> >> I see your last beacon is reporting 3dBm! Wow... that really is "flea >> power". Of course 2mW ERP from a small antenna won't go as far as 2mW >> ERP from a large one. >> >> Cheers, >> >> John >> GM4SLV >> >> > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.13/1914 - Release Date: 1/24/2009 8:40 PM