Return-Path: Received: from mtain-di02.r1000.mx.aol.com (mtain-di02.r1000.mx.aol.com [172.29.64.6]) by air-dd01.mail.aol.com (v129.4) with ESMTP id MAILINDD011-86074c17e9143c5; Tue, 15 Jun 2010 16:56:52 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-di02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 54134380000B8; Tue, 15 Jun 2010 16:56:51 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OOdAw-0003LP-Bo for rs_out_1@blacksheep.org; Tue, 15 Jun 2010 21:56:02 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OOdAv-0003LG-UB for rsgb_lf_group@blacksheep.org; Tue, 15 Jun 2010 21:56:01 +0100 Received: from out1.ip04ir2.opaltelecom.net ([62.24.128.240]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OOdAs-0006Br-Fu for rsgb_lf_group@blacksheep.org; Tue, 15 Jun 2010 21:56:01 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AmQFAPuFF0xcHKZe/2dsb2JhbACBQ5EYjB9xwVaFGgQ X-IronPort-AV: E=Sophos;i="4.53,422,1272841200"; d="scan'208,217";a="294494603" Received: from unknown (HELO laptopcore2) ([92.28.166.94]) by out1.ip04ir2.opaltelecom.net with ESMTP; 15 Jun 2010 21:55:52 +0100 From: "g3zjo" To: Date: Tue, 15 Jun 2010 21:55:51 +0100 Message-ID: <000401cb0ccd$244a4ff0$0202a8c0@laptopcore2> MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2616 In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: RE: Ground electrode antenna on 500kHz RX (and TX?) Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01CB0CD5.861128F0" 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_50_60, HTML_FONTCOLOR_UNKNOWN,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-sid: 3039ac1d40064c17e9130499 X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0005_01CB0CD5.861128F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Very nice Roger, I checked my spread sheet, it is the same signal strength -26dB, as you received me on your Spiral Top Loaded antenna. Eddie G3ZJO IO82ng -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Roger Lapthorn Sent: 15 June 2010 21:24 To: rsgb_lf_group@blacksheep.org Subject: LF: Ground electrode antenna on 500kHz RX (and TX?) This evening I tried listening with my 20m spaced ground electrode pair "antenna" on 500kHz WSPR. To my surprise it received G3ZJO and G7NKS at -26dB S/N. I'm tempted to try this on TX on 500kHz and see if anyone can receive me. On sub-9kHz it looks close to 50 ohms resistive but not sure what it looks like on 500kHz. This was the first time I've listened/looked on 500kHz for several weeks. 73s Roger G3XBM -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 ------=_NextPart_000_0005_01CB0CD5.861128F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Very nice Roger= , I checked my spread sheet, it is the same signal strength -26dB, as you received me on you= r Spiral Top Loaded antenna.

Eddie G3Z= JO IO82ng

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksh= eep.org] On Behalf Of R= oger Lapthorn
Sent: 15 June 2010 21:2= 4
To: rsgb_lf_group@black= sheep.org
Subject: LF: Ground ele= ctrode antenna on 500kHz RX (and TX?)

This evening I= tried listening with my 20m spaced ground electrode pair "antenna"= on 500kHz WSPR. To my surprise it received G3ZJO and G7NKS at -26dB S/N.&= nbsp; I'm tempted to try this on TX on 500kHz and see if anyone can receive me.= On sub-9kHz it looks close to 50 ohms resistive but not sure what it look= s like on 500kHz.

This was the first time I've listened/looked on 500kHz for several wee= ks.

73s
Roger G3XBM

--
http://g3xbm-qrp.blogspot.c= om/
http://www.g3xbm.co.uk
http://www.youtube.com/u= ser/g3xbm
G3XBM GQRP 1678 ISWL G11088

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