Delivered-To: daveyxm@virginmedia.com Received: by 10.50.142.105 with SMTP id rv9csp354354igb; Wed, 25 Jun 2014 10:12:40 -0700 (PDT) X-Received: by 10.180.72.176 with SMTP id e16mr43200717wiv.44.1403716359466; Wed, 25 Jun 2014 10:12:39 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id ep8si28455995wib.76.2014.06.25.10.12.24 for ; Wed, 25 Jun 2014 10:12:25 -0700 (PDT) Received-SPF: none (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WzqGA-0001Ww-3H for rs_out_1@blacksheep.org; Wed, 25 Jun 2014 17:41:22 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WzqG9-0001Wn-Rf for rsgb_lf_group@blacksheep.org; Wed, 25 Jun 2014 17:41:21 +0100 Received: from nina.ucs.mun.ca ([134.153.232.76]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.82) (envelope-from ) id 1WzqG8-0008AK-2e for rsgb_lf_group@blacksheep.org; Wed, 25 Jun 2014 17:41:20 +0100 Received: from plato.ucs.mun.ca (plato.ucs.mun.ca [134.153.232.153]) by nina.ucs.mun.ca (8.13.1/8.13.1) with ESMTP id s5PGfItF024959 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 25 Jun 2014 14:11:18 -0230 Date: Wed, 25 Jun 2014 14:11:18 -0230 (NDT) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: "rsgb_lf_group@blacksheep.org" In-Reply-To: Message-ID: References: <1403433467.29408.YahooMailBasic@web173001.mail.ir2.yahoo.com> <1WyhZD-2GWXa40@fwd29.t-online.de> MIME-Version: 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: Thanks for the suggestion, Roger. This seems like the best option until a very long piece of wire is found. Your VLF web page is an excellent source if info. Many thanks! Joe VO1NA On Mon, 23 Jun 2014, Roger Lapthorn wrote: [...] 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 [134.153.232.76 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 046f068074e745d5c60ca47deee9b503 Subject: Re: LF: VLF in Canada 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=0.3 required=5.0 tests=NO_REAL_NAME, TO_ADDRESS_EQ_REAL 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 Thanks for the suggestion, Roger. This seems like the best option until a very long piece of wire is found. Your VLF web page is an excellent source if info. Many thanks! Joe VO1NA On Mon, 23 Jun 2014, Roger Lapthorn wrote: > Joe, > > Alternatives are a large TX loop or even a large earth-electrode antenna. > You'll need some high voltage caps but no large coils to wind. > > 73s > Roger G3XBM > > > On 23 June 2014 20:33, wrote: > >> Dear Group, >> >> I tried again to get an LOA for VLF. This time, the response from >> Industry Canada was favourable: 10 mW 8.0-8.3 kHz. Yesterday, after a few >> slight rf burns, and thanks to PA0RDT's miniwhip design and DL4YHF's >> Spectrum Lab and advice, VLF sigs on 8.277 kHz were heard at 200m from the >> 100m wire aerial. This was a reception outside my back yard! 10 watts from >> an 1970's keyboard amp (volume control set on 3) were stepped up with an >> xfmr to a lossy 500 ohm tuning coil peaked with a ferrite rod for maximum >> squeal at L=0.35 H. >> >> Is it possible for someone who is not especially enthralled by winding >> a mile of 0.7mm wire to use an iron core to make a VLF tuning coil? >> >> 73 >> Joe VO1NA >> >> >