Return-Path: Received: from mtain-mg11.r1000.mx.aol.com (mtain-mg11.r1000.mx.aol.com [172.29.96.211]) by air-da06.mail.aol.com (v129.4) with ESMTP id MAILINDA064-86664d2ca50ef7; Tue, 11 Jan 2011 13:44:30 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg11.r1000.mx.aol.com (Internet Inbound) with ESMTP id B8275380000F4; Tue, 11 Jan 2011 13:44:28 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PcjBv-0002CD-D4 for rs_out_1@blacksheep.org; Tue, 11 Jan 2011 18:43:35 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PcjBu-0002C4-NL for rsgb_lf_group@blacksheep.org; Tue, 11 Jan 2011 18:43:34 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PcjBs-0001TW-0t for rsgb_lf_group@blacksheep.org; Tue, 11 Jan 2011 18:43:34 +0000 Received: by iyj21 with SMTP id 21so19629010iyj.16 for ; Tue, 11 Jan 2011 10:43:26 -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=OM0l6Mx264NlPhm0D13ZO0tziKUg4oI+HvUYC8Rp1FI=; b=tosfUzwD3NvxlPYsmZvuIhRVkyHXAsvpEXxhijpEulihJPgSXsCkVqztuFsTdhnaRv WShHsA9z/fxVZCoNnjdMbh6Zq+p+ASOVXaDpfO44t+U2HvBV2HbPDV3fbb/2OfN80RVG YAcNnaTiT/qtsTa3jpHAG32AOSp/3fa1/4CLI= 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=fCn1NRtRnQn80V9CbUbvWV8sE95dhv6ZIUqRPyIMuRQ/UW7mNwBLGsfo1ChaOQ3Msx vtfEmsRZ/JOjpFC3tesubjb91KBqE+NQXnAnz7luLVa2JAGzCR5GtbT7u1U5P9+EDkAd lzfvULgyBsMsWkUsRjZigqSU6WL6L05rDaAxY= MIME-Version: 1.0 Received: by 10.42.178.8 with SMTP id bk8mr6141979icb.99.1294771404537; Tue, 11 Jan 2011 10:43:24 -0800 (PST) Received: by 10.42.241.133 with HTTP; Tue, 11 Jan 2011 10:43:24 -0800 (PST) In-Reply-To: References: Date: Tue, 11 Jan 2011 18:43:24 +0000 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=disabled,HTML_IMAGE_RATIO_02=0.192,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=90e6ba6e8f54a200d8049996757b X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_60_70, 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-d024.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60d34d2ca50c07d0 X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --90e6ba6e8f54a200d8049996757b Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 0.18A and an assumed Heffective of 3m Andy. 73s Roger G3XBM On 11 January 2011 18:39, Andy Talbot wrote: > What antenna current are you getting? > - OR - > What is the total resonant input resistance of the vertical + ground sys= tem > (before any matching network) .and the RF power being delivered into thi= s, > > 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 su= ms >> 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 wrot= e: >> >>> Dear All, >>> >>> Today I rigged up and matched a simple, small, Marconi vertical on 136= kHz >>> 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 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.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 >> >> >> = >> > > --=20 g3xbm-qrp.blogspot.com/ www.g3xbm.co.uk www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 <#> <#> <#> <#> --90e6ba6e8f54a200d8049996757b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 0.18A and an assumed Heffective of 3m Andy.

73s
Roger G3XBM
<= br>
On 11 January 2011= 18:39, Andy Talbot <andy.g4jnt@gmail.com> wrote:
What anten= na 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 antenn= a. 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:=
Dear All,
Today I rigged up and matched a simple, small, Marconi vertical on 136kH= z 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 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
<= /table>
3D""
=
=A0 =A0
=A0
3D"" =A0 3D"" =A0 =A0 =A0
=
=A0
=A0



--
g3xbm-qrp.blogspot.com/=
www.g3xbm.co.= uk
www.youtub= e.com/user/g3xbm
<= /a>G3XBM=A0=A0 GQRP 1678=A0=A0=A0 ISWL G11088
= 3D""
=20 =20
=A0 =A0
=20
=A0
3D"" =A0 3D"" =A0 =A0 =A0
=20
=A0
=A0
=20 =20 =20
=20 =20 =20 = =20
= =20
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=20
--90e6ba6e8f54a200d8049996757b--