Return-Path: Received: from mtain-dj05.r1000.mx.aol.com (mtain-dj05.r1000.mail.aol.com [172.19.187.141]) by air-mb08.mail.aol.com (v129.4) with ESMTP id MAILINMB084-a8064bec4b3fb7; Thu, 13 May 2010 14:55:59 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dj05.r1000.mx.aol.com (Internet Inbound) with ESMTP id A7FF5380000FD; Thu, 13 May 2010 14:55:57 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OCdYh-0007wU-Vx for rs_out_1@blacksheep.org; Thu, 13 May 2010 19:54:59 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OCdYh-0007wL-HX for rsgb_lf_group@blacksheep.org; Thu, 13 May 2010 19:54:59 +0100 Received: from mail-fx0-f43.google.com ([209.85.161.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OCdYe-0003CD-HP for rsgb_lf_group@blacksheep.org; Thu, 13 May 2010 19:54:59 +0100 Received: by fxm14 with SMTP id 14so1598500fxm.16 for ; Thu, 13 May 2010 11:54:50 -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=pEKEhnz94NvfsXG5mdZlZIV2fpaDEE+2L7zY/QXOFJw=; b=kNjUdIuDheiDQqetbhDyuLjF5np1HS1Tj/NHQrn/0a2mdmZoTu19HYKMA+kculSADQ fjjg6NOgBOLPq2CGpDVA+BwlrZz6QAnGip5naM3mUh+vJuICXBcza0ptgLY3WPzpGMiD vpMmeflz+dhRbQQ3NyOgtroklTtn4r3yEjNJo= 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=kyjXfcC7gbAXCvieU1IUnP5VJQoXms0y+ifBEFV411ywptEDx42AUQZAL1AOvzcR8F 3rlE/A8OVFySe4K9iOff7aOBRaK3llLVJwUzYJFI5N5K8HfmiWE94AyIdyaqigun/WOA 2QxQLdWVPT498kMpT+FgFbRlFMUkEwsmda1rA= MIME-Version: 1.0 Received: by 10.204.47.98 with SMTP id m34mr41349bkf.35.1273776890349; Thu, 13 May 2010 11:54:50 -0700 (PDT) Received: by 10.204.58.204 with HTTP; Thu, 13 May 2010 11:54:50 -0700 (PDT) In-Reply-To: <000a01caf2cb$bffbbef0$0401a8c0@xphd97xgq27nyf> References: <000a01caf2cb$bffbbef0$0401a8c0@xphd97xgq27nyf> Date: Thu, 13 May 2010 19:54:50 +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: MET Office Content-Type: multipart/alternative; boundary=0016e6dd8b861288a504867e4b20 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-d223.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039cdbc9d0a4bec4b3d2eff X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --0016e6dd8b861288a504867e4b20 Content-Type: text/plain; charset=ISO-8859-1 Mal, As M0BMU has demonstrated, a simple loop and preamp into a PC based VLF receiver such as SpectrumLab is able to receive stations as distant as DK7FC as long as the external noise floor around 8.97kHz is low enough. Like many, I'm experimenting with such ideas with the intention of being able to listen/look for DX signals from people able to run decent TX powers and erect large TX antennas, not a luxury here in my tiny plot sadly. Nonetheless I intend to see what is possible despite my severe limitations. DX reports for me may be a few miles at best, but I hope to be able to give reports to others at considerable range. For M0BMU's loop-preamp see my sub-9kHz webpage: http://sites.google.com/site/g3xbmqrp/Home/10khz 73s and hope to hear/see you on sub-9kHz in the autumn Mal! Roger G3XBM On 13 May 2010 19:40, mal hamilton wrote: > Another hurdle the met office !!!! this time. How about another freq like > 16 kHz. I cannot see how a few micro watts erp is going to effect the met > office thunder and lightening Mega watt programme. > No one so far has responded to my message about RX capabilities on 9 kHz ie > a suitable RX and proper antennas, a requirement for long haul > communications. > hundreds of miles not yards > mal/g3kev > > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 --0016e6dd8b861288a504867e4b20 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mal,

As M0BMU has demonstrated, a simple loop and preamp into a PC= based VLF receiver such as SpectrumLab is able to receive stations as dis= tant as DK7FC as long as the external noise floor around 8.97kHz=A0 is low= enough.=A0

Like many, I'm experimenting with such ideas with the intention of= being able to listen/look for DX signals from people able to run decent= TX powers and erect large TX antennas, not a luxury here in my tiny plot= sadly. Nonetheless I intend to see what is possible despite my severe lim= itations. DX reports for me may be a few miles at best, but I hope to be= able to give reports to others at considerable range.

For M0BMU's loop-preamp see my sub-9kHz webpage:
http://sites.google.com/sit= e/g3xbmqrp/Home/10khz

73s and hope to hear/see you on sub-9kHz= in the autumn Mal!

Roger G3XBM



On 13 May 2010= 19:40, mal hamilton <g3kevmal@talktalk.net> wrote:
Another hurdle the met office !!!! th= is time. How=20 about another freq like 16 kHz. I cannot see how a few micro watts erp is= going=20 to effect the met office thunder and lightening Mega watt=20 programme.
No one so far has responded to my mes= sage about RX=20 capabilities on 9 kHz ie a suitable RX and proper antennas, =A0a requireme= nt=20 for long haul communications.
hundreds of miles not yards
mal/g3kev
=A0
=A0



--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
--0016e6dd8b861288a504867e4b20--