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[86.14.226.229]) by mx.google.com with ESMTPS id 18sm48822586bkv.0.2013.01.09.06.54.34 (version=SSLv3 cipher=OTHER); Wed, 09 Jan 2013 06:54:35 -0800 (PST) From: Roger Lapthorn X-Mailer: iPod Mail (10A523) Message-Id: <3401C753-302E-4621-9137-45B9A216D17F@gmail.com> Date: Wed, 9 Jan 2013 14:54:29 +0000 To: "rsgb_lf_group@blacksheep.org" , rsgb_lf_group@yahoogroups.co.uk Mime-Version: 1.0 (1.0) X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Ok, so as the final instalment of this test I have now got the wires from the earth rods coming to the transverter just resting on the wet grass (what was elevated by 1.5m is now zero). It seems to work best just feeding the transverter straight into the rods without matching suggesting low reactance and near 50 ohms. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.214.46 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rogerlapthorn[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 5c1f37c04fc013ebbc2288fd3791d043 Subject: LF: Earth electrode antenna with wire at zero height (WSPR 472kHz) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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: mtain-dd05.r1000.mx.aol.com ; domain : gmail.com DKIM : fail x-aol-sid: 3039ac1d409150ed85283758 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Ok, so as the final instalment of this test I have now got the wires from th= e earth rods coming to the transverter just resting on the wet grass (what w= as elevated by 1.5m is now zero). It seems to work best just feeding the tra= nsverter straight into the rods without matching suggesting low reactance an= d near 50 ohms.=20 I'm still getting decent reports! So, it confirms the "loop in the ground" t= heory, or it is acting as some bizarre E field antenna.=20 Will again leave it running overnight to get a decent number of spots but al= ready I think we have an answer.=20 What I can try next - is this ever going to end!? - is elevate the loop part= "in the air" to much greater height (about 9m to match the top of the Marc= oni I just took down) and see how much improvement I get. More in the air im= plies greater loop area so more signal. Just how much will indicate how much= of the loop's effective area is in the soil/rock.=20 WSPR spots please folks.=20 73s Roger G3XBM=20=