Return-Path: Received: from mtain-dl05.r1000.mx.aol.com (mtain-dl05.r1000.mx.aol.com [172.29.74.211]) by air-dd08.mail.aol.com (v129.4) with ESMTP id MAILINDD084-86b04d2ca43d122; Tue, 11 Jan 2011 13:41:01 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 07AC0380000C7; Tue, 11 Jan 2011 13:40:59 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Pcj8a-00025w-Kz for rs_out_1@blacksheep.org; Tue, 11 Jan 2011 18:40:08 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Pcj8a-00025n-25 for rsgb_lf_group@blacksheep.org; Tue, 11 Jan 2011 18:40:08 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Pcj8W-0001Pn-8A for rsgb_lf_group@blacksheep.org; Tue, 11 Jan 2011 18:40:08 +0000 Received: by iyj21 with SMTP id 21so19626111iyj.16 for ; Tue, 11 Jan 2011 10:39:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=EC0h/c5Jz2mqHCuH5EDKNMXla7lCv9lLtXptRwoEgFE=; b=WYX43LZuG5dkQ5LaN9g+M1Zva2Frmvb5E//4viMqU4TSyMnmAyKeuNmjRlolbmJqQF As4reiLtncDalSzrQJdUuUTbkBq5tMoqTwukTE0vxfD1jwJ3eajHj/FP5BUE7Pe/nZxz mrHmohaHYO1Fl0HBIyk7GrHpj+/yWsqAQBgvE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=WSxrz+99dzDWB19i8kupH4JUAY2CnESHFT4lRNKL/4ybwcXlRgGsdqyEs5O0OBczqA Y+jqXwvKImSAj1r7lvWy7gg6RfR3d9qO6FZnzmkWOXZ1Jll6VEnES1LKv5DoFtXxKyFH 7Fobnz56TfUfH9F2eJf5ou9/FU5nUqSMq1g9U= MIME-Version: 1.0 Received: by 10.231.199.10 with SMTP id eq10mr30331031ibb.112.1294771198071; Tue, 11 Jan 2011 10:39:58 -0800 (PST) Received: by 10.231.200.211 with HTTP; Tue, 11 Jan 2011 10:39:58 -0800 (PST) In-Reply-To: References: Date: Tue, 11 Jan 2011 18:39:58 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126 Subject: Re: LF: Re: Increased ERP on 137.5kHz - WSPR reports please Content-Type: multipart/alternative; boundary=90e6ba4fc4c6539575049996692d X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_FONTCOLOR_UNSAFE, HTML_MESSAGE,HTML_TAG_EXISTS_TBODY 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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d013.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d4ad34d2ca43b425e X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --90e6ba4fc4c6539575049996692d Content-Type: text/plain; charset=ISO-8859-1 What antenna current are you getting? - OR - What is the total resonant input resistance of the vertical + ground system (before any matching network) .and the RF power being delivered into this, Either of these will allow a reasonable estimate of ERP Andy www.g4jnt.com On 11 January 2011 18:26, Roger Lapthorn wrote: > So much for the theory then.... > > The signal level at G6ALB in the next village (3km although WSPR shows it > as 0km) is some 10dB *down* on my loop antenna. Not sure if I got my sums > wrong or there is some unexplained loss. The RX system at G6ALB is > unchanged. > > 73s > Roger G3XBM > > On 11 January 2011 17:32, Roger Lapthorn wrote: > >> Dear All, >> >> Today I rigged up and matched a simple, small, Marconi vertical on 136kHz >> instead of the vertical loop. Based on measurements of antenna current and >> some reasonable assumptions of effective height, I now believe I have around >> 200uW ERP on the band - heck this is *high* power for me! >> >> From now until late this evening I will run the WSPR beacon (136kHz USB >> dial) in the hope that a few more people will be able to copy the QRPp >> signal. Please have a go and let me have any reports. >> >> 73s and good luck >> >> Roger G3XBM >> >> -- >> g3xbm-qrp.blogspot.com/ >> www.g3xbm.co.uk >> www.youtube.com/user/g3xbm >> G3XBM GQRP 1678 ISWL G11088 >> > > > > -- > g3xbm-qrp.blogspot.com/ > www.g3xbm.co.uk > www.youtube.com/user/g3xbm > G3XBM GQRP 1678 ISWL G11088 > > > > > > --90e6ba4fc4c6539575049996692d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
What antenna current are you getting?
=A0- OR -
What is the total resonant input resistance of the vertical + ground= system (before any matching network) .and the RF power being delivered in= to this,
=A0
Either of =A0these will allow a reasonable estimate of ERP
=A0
Andy
=A0


=A0
On 11 January 2011 18:26, Roger Lapthorn <rogerlapthorn@= gmail.com> wrote:
So much for the theory then...= .

The signal level at G6ALB in the next village (3km although WSPR= shows it as 0km) is some 10dB down on my loop antenna. Not sure if= I got my sums wrong or there is some unexplained loss. The RX system at= G6ALB is unchanged.

73s
Roger G3XBM

On 11 January 2011 17:= 32, Roger Lapthorn <rogerlapthorn@gmail.com> wrote:<= br>
Dear All,

= Today I rigged up and matched a simple, small, Marconi vertical on 136kHz= instead of the vertical loop. Based on measurements of antenna current an= d some reasonable assumptions of effective height, I now believe I have ar= ound 200uW ERP on the band - heck this is high power for me!

From now until late this evening I will run the WSPR beacon (136kHz US= B dial) in the hope that a few more people will be able to copy the QRPp= signal. Please have a go and let me have any reports.

73s and good= luck

Roger G3XBM

--
g3xbm-qrp.blogspot.= com/
www.g3xb= m.co.uk
www.youtub= e.com/user/g3xbm
= G3XBM=A0=A0 GQRP 1678=A0=A0=A0 ISWL G11088



--
g3= xbm-qrp.blogspot.com/
www.g3xbm.co.uk
www.youtube.com/user/g3xbm
G3XBM=A0=A0 GQRP 167= 8=A0=A0=A0 ISWL G11088
3D""
=A0 =A0
=A0
=3D"" =A0 =3D"" =A0 =A0 =A0
=A0
=A0
--90e6ba4fc4c6539575049996692d--