Return-Path: Received: from mtain-mb10.r1000.mx.aol.com (mtain-mb10.r1000.mx.aol.com [172.29.96.30]) by air-mb03.mail.aol.com (v129.4) with ESMTP id MAILINMB032-a21d4cbb3f8133d; Sun, 17 Oct 2010 14:25:05 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mb10.r1000.mx.aol.com (Internet Inbound) with ESMTP id 0CDF638000109; Sun, 17 Oct 2010 14:25:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P7Xsv-0008MM-Jd for rs_out_1@blacksheep.org; Sun, 17 Oct 2010 19:23:05 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P7Xsv-0008MD-4Q for rsgb_lf_group@blacksheep.org; Sun, 17 Oct 2010 19:23:05 +0100 Received: from 113-mo2-8.acn.waw.pl ([62.121.95.113] helo=paranoid.lipkowski.org) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P7Xss-0002te-Q1 for rsgb_lf_group@blacksheep.org; Sun, 17 Oct 2010 19:23:05 +0100 Received: from paranoid.lipkowski.org (localhost [127.0.0.1]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id o9HIMxjD009236 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 17 Oct 2010 20:22:59 +0200 Received: from localhost (sq5bpf@localhost) by paranoid.lipkowski.org (8.13.7/8.13.6/Submit) with ESMTP id o9HIMxjR009233 for ; Sun, 17 Oct 2010 20:22:59 +0200 X-Authentication-Warning: paranoid.lipkowski.org: sq5bpf owned process doing -bs Date: Sun, 17 Oct 2010 20:22:59 +0200 (CEST) From: Jacek Lipkowski To: rsgb_lf_group@blacksheep.org In-Reply-To: <001101cb6e02$e26c7620$0401a8c0@xphd97xgq27nyf> Message-ID: References: <8CD38567F4B0C6A-1C1C-116D@webmail-m021.sysops.aol.com> <2C4BE56C4BAB4EB984EBC865A2BBC338@Black> <4CBAE155.6030500@freenet.de> <84762FB94EEB4248987AE5E44EBD03A8@JimPC> <001101cb6e02$e26c7620$0401a8c0@xphd97xgq27nyf> MIME-Version: 1.0 X-Spam-Score-sq5bpf: -2.601 () BAYES_00,SPF_HELO_PASS,SPF_PASS X-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: VLF: Re: Detections of 5 microwatt transmission Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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-sid: 3039ac1d601e4cbb3f7e1fa5 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) On Sun, 17 Oct 2010, mal hamilton wrote: > This looks like a lot of trouble for no real practical purpose, other than > maybe get a glimpse of a carrier an odd time on 8970 Kcs > The possibility of a real time QSO on this band over any distance looks > remote. In all it seems a lot of effort for little reward. Mal, take a look at Stefan's signal at 904km: http://www.lipkowski.org/~sq5bpf/dk7fc_20101002/ the shorter lower frequency dash is abt 720s long, a 120s dash would still be detactable. so DFCW120 is practical at 904km distance. DFCW 120 is considered a practical QSO mode by many. btw Mal, maybe you should try your luck in transmitting with your big antennas. get a stable frequency generator, put up a carrier, and give us a chance. you might be surprised at the results. VY 73 Jacek / SQ5BPF