Return-Path: Received: from mtain-mj06.r1000.mx.aol.com (mtain-mj06.r1000.mail.aol.com [172.21.164.90]) by air-mf05.mail.aol.com (v129.4) with ESMTP id MAILINMF054-8bec4c62e1d3a7; Wed, 11 Aug 2010 13:45:55 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mj06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 35477380000AD; Wed, 11 Aug 2010 13:45:53 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OjFMB-0002kk-G9 for rs_out_1@blacksheep.org; Wed, 11 Aug 2010 18:44:51 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OjFMB-0002kb-1d for rsgb_lf_group@blacksheep.org; Wed, 11 Aug 2010 18:44:51 +0100 Received: from mail-bw0-f43.google.com ([209.85.214.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OjFM9-0003eG-JK for rsgb_lf_group@blacksheep.org; Wed, 11 Aug 2010 18:44:50 +0100 Received: by bwz11 with SMTP id 11so363362bwz.16 for ; Wed, 11 Aug 2010 10:44:48 -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=SNFqUOdBYhvqv4hwbULikpXZbBKY5oDImRIJD26Cwv0=; b=MqvcVv2qhCSqQEfysTY6pFXp1fPXMepSi5FOIMMdgkAnU5W7YZaRU4M2NOFaqvEJB8 xjH+bYfUQCGBTSEDwaSJgQ8KYrq9c1qpwoQu7120nlv4qWYk4NjgrSQd+V1woj1GMRuB vwAU9MWAKh42hjZswBr/zs1BntTrEQKuY+tuc= 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=mPFu5lLvL9kstfQWyNTIPeBhwxda6dGm5SPpHRfFBavoUxBFuYcyjGDtucCSoYNrSn UYhq4EEOqYBKjcSKZpV3yzCgumdxVJ2wChcYK4LJr8ZaOwrhf9fkj5+hDvm4x4LrHLiN ijosZAqbfSuG+tcu9KgLV0CbUMbAyID4Sd+9U= MIME-Version: 1.0 Received: by 10.204.73.211 with SMTP id r19mr5480517bkj.131.1281548688241; Wed, 11 Aug 2010 10:44:48 -0700 (PDT) Received: by 10.204.194.69 with HTTP; Wed, 11 Aug 2010 10:44:48 -0700 (PDT) In-Reply-To: <002001cb397a$055bd990$0401a8c0@xphd97xgq27nyf> References: <002001cb397a$055bd990$0401a8c0@xphd97xgq27nyf> Date: Wed, 11 Aug 2010 18:44:48 +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: ERP DISTANCE ETC Content-Type: multipart/alternative; boundary=0016e6dd9946533606048d8fced0 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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m257.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039400c89ac4c62e1d15d8f X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --0016e6dd9946533606048d8fced0 Content-Type: text/plain; charset=ISO-8859-1 Mal, Thanks again for the great encouragement. Would you prefer we just watched TV instead and gave up the hobby? Here, I've *no interest* in running high power on *any* band, rather I want to see what I can achieve with low power, simple rigs and simple antennas. If this results in my best DX being only 20-30km then so be it. As for your comment on earth antennas, I beg to differ. There is still a *great deal* to be explored and understood in this area on all bands from sub-9kHz to at least 500kHz. 73s Roger G3XBM On 11 August 2010 18:24, mal hamilton wrote: > Lots of figures appearing on here at present are guesswork and > misleading. This has happened in the past trying to guess who was running > what power, then the conclusion was + or - 6 to 10 dB wich is nonsense ie > could be !W or 4W or !W or 10W. For those complaining about no room for > large antennas, use the best elevated antenna you can get up and run several > K/Watts to achieve the required ERP. > Earth antennas have also been tested in the past are only useful for Cave > radio communications, the wheel keeps being reinvented here on LF. > G3KEV > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 --0016e6dd9946533606048d8fced0 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mal,

Thanks again for the great encouragement. Would you prefer we= just watched TV instead and gave up the hobby?

Here, I've n= o interest in running high power on any band, rather I want to= see what I can achieve with low power, simple rigs and simple antennas.= If this results in my best DX being only 20-30km then so be it.

As for your comment on earth antennas, I beg to differ. There is still= a great deal to be explored and understood in this area on all ban= ds from sub-9kHz to at least 500kHz.

73s
Roger G3XBM





On 11 August 2010 18:24, mal hamilt= on <g3kevmal= @talktalk.net> wrote:
Lots of figures appearing on here at= present are=20 guesswork and misleading. This has happened in the past trying to guess wh= o was=20 running what power, then the conclusion was + or - 6 to 10 dB wich is nons= ense=20 ie could=A0be !W or 4W or !W or 10W. For those complaining about no room= for=20 large antennas, use the best elevated antenna you can get up and run sever= al=20 K/Watts to achieve the required ERP.
Earth antennas have also been tested= in the past=20 are only useful for Cave radio communications, the wheel keeps being reinv= ented=20 here on LF.
G3KEV
=A0



--
http://g3xbm-qrp.blogspot.com/<= br>http://www.g3xbm.c= o.uk
http://www= .youtube.com/user/g3xbm
G3XBM=A0=A0 GQRP 1678=A0=A0=A0 ISWL G11088<= br> --0016e6dd9946533606048d8fced0--