Return-Path: Received: from mtain-dg03.r1000.mx.aol.com (mtain-dg03.r1000.mx.aol.com [172.29.65.11]) by air-di06.mail.aol.com (v129.4) with ESMTP id MAILINDI062-eacb4d0793273e7; Tue, 14 Dec 2010 10:54:15 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5FA87380001B7; Tue, 14 Dec 2010 10:54:13 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PSXBR-00073f-5f for rs_out_1@blacksheep.org; Tue, 14 Dec 2010 15:52:57 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PSXBQ-00073W-Nr for rsgb_lf_group@blacksheep.org; Tue, 14 Dec 2010 15:52:56 +0000 Received: from out1.ip09ir2.opaltelecom.net ([62.24.128.245]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PSXBO-0004bE-49 for rsgb_lf_group@blacksheep.org; Tue, 14 Dec 2010 15:52:56 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgsFAG4hB01Ok8SD/2dsb2JhbACRWgOSMXjCEYVKBI4r X-IronPort-AV: E=Sophos;i="4.59,342,1288569600"; d="scan'208,217";a="460540532" Received: from unknown (HELO xphd97xgq27nyf) ([78.147.196.131]) by out1.ip09ir2.opaltelecom.net with SMTP; 14 Dec 2010 15:52:48 +0000 Message-ID: <003801cb9ba6$f1974450$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: "rsgb" Date: Tue, 14 Dec 2010 15:52:17 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Earth Mode Content-Type: multipart/alternative; boundary="----=_NextPart_000_0035_01CB9BA6.E21F2740" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,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: 3039ac1d410b4d0793255a76 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_0035_01CB9BA6.E21F2740 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable LF Although I am not intending to follow this persuit I am curious. The confusion arises over the layout of the wires and is not made clea= r by anyone using the system as far as I know. Two wires get a mention. Are they laid out across the ground like a di= pole, random length and the far end earthed by an earth rod driven int= o the ground. or do the wires run in parallel and what distance apart and are the wires insulated, at the feed point how close are the wires, is= a transformer used to match the amplifier of around 8 Ohms output to= the wires and what impedence are the wires. are the wires lying on the ground or slightly elevated ? also there is reference to buried pipes, elec wires etc enhancing the propa= gation properties of the signal but since this would be specific to th= e particular location=20 it cannot be relied upon as a statistic for a serious study how the ea= rth mode works As well as above there is a power consideration when trying to determi= n how far the signal would be received. >From information that I have the distance covered would be short, howe= ver if in some cases the wires were slightly elevated above ground eve= n by a metre this could be considered an elevated antenna. Could someone clarify all these ambiguites=20 I await some info de g3kev ------=_NextPart_000_0035_01CB9BA6.E21F2740 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
LF
Although I am not intending to follow= this persuit=20 I am curious.
The confusion arises over the layout= of the wires=20 and is not made clear by anyone using the system as far as I=20 know.
Two wires get a mention. Are they lai= d out across=20 the ground like a dipole, random length and the far end earthed by an= earth rod=20 driven into the ground.
or
do the wires run in parallel and what= distance=20 apart
and
are the wires insulated, at the feed= point how=20 close are the wires, is a transformer used to match the amplifier of= around 8=20 Ohms output to the wires and what impedence are the wires.
are the wires lying on the ground or= slightly=20 elevated ?
also
there is reference to buried pipes,= elec wires etc=20 enhancing the propagation properties of the signal but since this woul= d be=20 specific to the particular location
it cannot be relied upon as a statist= ic for a=20 serious study how the earth mode works
As well as above there is a power con= sideration=20 when trying to determin how far the signal would be received.
From information that I have the dist= ance covered=20 would be short, however if in some cases the wires were slightly eleva= ted above=20 ground even by a metre this could be considered an elevated=20 antenna.
Could someone clarify all these ambig= uites=20
 
I await some info
de g3kev
 
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