Return-Path: Received: from mtain-dd11.r1000.mx.aol.com (mtain-dd11.r1000.mx.aol.com [172.29.64.151]) by air-di08.mail.aol.com (v129.4) with ESMTP id MAILINDI081-eb664c193369348; Wed, 16 Jun 2010 16:26:17 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dd11.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9FDC2380000EE; Wed, 16 Jun 2010 16:26:15 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OOzAU-0005Jy-Fo for rs_out_1@blacksheep.org; Wed, 16 Jun 2010 21:25:02 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OOzAU-0005Jp-1T for rsgb_lf_group@blacksheep.org; Wed, 16 Jun 2010 21:25:02 +0100 Received: from mail-bw0-f43.google.com ([209.85.214.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OOzAR-0007vZ-AB for rsgb_lf_group@blacksheep.org; Wed, 16 Jun 2010 21:25:02 +0100 Received: by bwz19 with SMTP id 19so3532762bwz.16 for ; Wed, 16 Jun 2010 13:24:58 -0700 (PDT) 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=bcMpBFGRhmrpwYMe/xOtjpwap7aPK6Lwr6RLjWRfamo=; b=f7boOA2UG0Ca/Y7dJ1Qc2BtiBY8n0XYoPCLBQt0Nc5kmXq5LjvqZugVRiTyX74iR2o kkcc+7mPsTYkkCDd0yAu76/YzJB+Z1l5aKew+c9+7F2BlrXyLWsImVgS3D1tDl+pzDMA /jTUrxrTaCKoqzZwQlLEDOupasXB3QydysT2I= 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=h6/vGWjJlf6ZWTZbLGyDzBp/g1020IVVLn70o+KglLkx0c0PuxGTiVz8ItD+JFlpOj 6P3BE8CGgO6FYJN/2HvgBU56ck6kLgcg4FpUvEQX9qy3mkC8lRCtIaMXkyaL6XDHJCmj h/wLzsdtc9DrO8xRxK1NcREbJ+tMo5V+bYDUs= MIME-Version: 1.0 Received: by 10.204.137.216 with SMTP id x24mr6864631bkt.168.1276719897373; Wed, 16 Jun 2010 13:24:57 -0700 (PDT) Received: by 10.204.100.69 with HTTP; Wed, 16 Jun 2010 13:24:57 -0700 (PDT) In-Reply-To: References: Date: Wed, 16 Jun 2010 21:24:57 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Who needs antennas! - success with ground electrodes on 500kHz Content-Type: multipart/alternative; boundary=00151747b360f5eba804892b8330 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=HTML_20_30, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE 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-m271.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40974c19336738cb X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --00151747b360f5eba804892b8330 Content-Type: text/plain; charset=ISO-8859-1 Currently G3XIZ is running at +7dB S/N here on WSPR on the earth electrodes. My feeling is that on RX this is as good as my vertical was! TX not bad at all either..... Roger G3XBM On 16 June 2010 20:10, Roger Lapthorn wrote: > Well, I'm amazed. > > This evening I connected my 500kHz transverter straight to the two > connections of my sub-9kHz grounded electrodes and TXed WSPR. No attempt was > made to match anything on the assumption that the two electrodes system > looked not too far from 50 ohms resistive as measured between 1-9kHz.. Pout > from the IRF510 is around 5W. What happened? * > > Three people copied me* - M0BMU, G7NKS and M0JXM with reports between -21 > and -28dB S/N. The wire to the furtherest ground rod is at most 20m long and > most of the way it is 1.5m above ground. Once again, this must be acting as > a pretty effective loop mostly within the ground. Screen grab of the WSPR > log attached. > > So, if you live on clunchy chalk soils like me then don't worry too much > about big antennas, :-) > > 73s > Roger G3XBM > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > G3XBM GQRP 1678 ISWL G11088 > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 --00151747b360f5eba804892b8330 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Currently G3XIZ is running at +7dB S/N here on WSPR on the earth electrode= s. My feeling is that on RX this is as good as my vertical was! TX not bad= at all either.....

Roger G3XBM


On 16 June 2010 20:10, Roger Lapthorn <rogerlapthorn@gmail.com> wrote:=
Well, I'm amazed.

This evening I connected my 500kHz transvert= er straight to the two connections of my sub-9kHz grounded electrodes and= TXed WSPR. No attempt was made to match anything on the assumption that= the two electrodes system looked not too far from 50 ohms resistive as me= asured between 1-9kHz.. Pout from the IRF510 is around 5W. What happened?=

Three people copied me - M0BMU, G7NKS and M0JXM with reports betwe= en -21 and -28dB S/N. The wire to the furtherest ground rod is at most 20m= long and most of the way it is 1.5m above ground. Once again, this must= be acting as a pretty effective loop mostly within the ground.=A0 Screen= grab of the WSPR log attached.

So, if you live on clunchy chalk soils like me then don't worry to= o much about big antennas, :-)

73s
Roger G3XBM
=
--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.u= k
h= ttp://www.youtube.com/user/g3xbm
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0= ISWL G11088



--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
--00151747b360f5eba804892b8330--