Return-Path: Received: from mtain-me02.r1000.mx.aol.com (mtain-me02.r1000.mx.aol.com [172.29.96.138]) by air-dc02.mail.aol.com (v129.4) with ESMTP id MAILINDC021-85fe4d2ca7463a3; Tue, 11 Jan 2011 13:53:58 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6A2C4380000B4; Tue, 11 Jan 2011 13:53:56 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PcjLI-0002L0-9g for rs_out_1@blacksheep.org; Tue, 11 Jan 2011 18:53:16 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PcjLH-0002Kq-NZ for rsgb_lf_group@blacksheep.org; Tue, 11 Jan 2011 18:53:15 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PcjLF-0001Xk-HF for rsgb_lf_group@blacksheep.org; Tue, 11 Jan 2011 18:53:15 +0000 Received: from ix.urz.uni-heidelberg.de (cyrus-portal.urz.uni-heidelberg.de [129.206.100.176]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p0BIrCdu027443 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 11 Jan 2011 19:53:12 +0100 Received: from extmail.urz.uni-heidelberg.de (extmail.urz.uni-heidelberg.de [129.206.100.140]) by ix.urz.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p0BIrB9I014347 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 11 Jan 2011 19:53:11 +0100 Received: from [129.206.196.91] (vpn091a.rzuser.uni-heidelberg.de [129.206.196.91]) by extmail.urz.uni-heidelberg.de (8.13.4/8.13.1) with ESMTP id p0BIrAt4018498 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 11 Jan 2011 19:53:11 +0100 Message-ID: <4D2CA71C.5070808@iup.uni-heidelberg.de> Date: Tue, 11 Jan 2011 19:53:16 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: In-Reply-To: X-Spam-Score: 1.7 (+) X-Spam-Report: autolearn=disabled,HTML_IMAGE_RATIO_02=0.192,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Re: Increased ERP on 137.5kHz - WSPR reports please Content-Type: multipart/alternative; boundary="------------090103060207070704040208" 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-sid: 3039ac1d608a4d2ca7445add X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --------------090103060207070704040208 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Roger, Maybe there was a kind of "utilities assisted earth mode" on the loop at 3 km distance, as you call it? How high is the antenna and where is is placed? I hope its on the roof of the house :-) If its near a wet tree and just 3m long, it may be worse than the loop. How do you measure the resonance? If you measure the antenna current, how high is it? I think you are on the right way to make your signal detectable in higher distances! Good luck! 73, Stefan/DK7FC Am 11.01.2011 19:26, schrieb Roger Lapthorn: > 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 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --------------090103060207070704040208 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Roger,

Maybe there was a kind of  "utilities assisted earth mode" on the loop at 3 km distance, as you call it? How high is the antenna and where is is placed? I hope its on the roof of the house :-) If its near a wet tree and just 3m long, it may be worse than the loop. How do you measure the resonance? If you measure the antenna current, how high is it?
I think you are on the right way to make your signal detectable in higher distances! Good luck!

73, Stefan/DK7FC

Am 11.01.2011 19:26, schrieb Roger Lapthorn:
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:
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
--------------090103060207070704040208--