Return-Path: X-Spam-DCC: paranoid 1169; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, NO_REAL_NAME autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id t34Ma4fC021153 for ; Sun, 5 Apr 2015 00:36:04 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YeWdK-0002my-AQ for rs_out_1@blacksheep.org; Sat, 04 Apr 2015 23:33:42 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YeWdK-0002mp-2m for rsgb_lf_group@blacksheep.org; Sat, 04 Apr 2015 23:33:42 +0100 Received: from nina.ucs.mun.ca ([134.153.232.76]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.85) (envelope-from ) id 1YeWdH-0000aV-Hs for rsgb_lf_group@blacksheep.org; Sat, 04 Apr 2015 23:33:40 +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 t34MXamG015388 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 4 Apr 2015 20:03:36 -0230 Date: Sat, 4 Apr 2015 20:03:36 -0230 (NDT) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: <552009D2.3070105@gmail.com> Message-ID: References: <551F1D67.8050609@gmail.com> <552009D2.3070105@gmail.com> MIME-Version: 1.0 X-Scan-Signature: 0b2d339ae1d48966556dfb6ad64e2bce Subject: LF: VLF in Canada Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 2881 Dear Group, Last summer, my VLF CW signals were copied outside my back yard. Today, using a Marconi XH-100 with a SRA-8 mixer & AD9850/Arduino LO and a National LF-10 preselector, the sigs could be clearly heard outside my town with a 20 metre wire aerial strung between the car and a road sign. For TX, the 100m wire (~15 m high) was coupled with 425 mH to a variac (2:1) in series with a 5:1 ferrite xfmr to the keyboard amp with the volume control set to 5 (about 30 watts). This is DX record on 8.277 kHz for this station -- 1.25 km! I wonder how far away it could be copied with QRSS? Any TA attempt will have to wait until a higher Q tuning coil appears. The DC resistance of the current one is almost 1k and I think it has much series capacitance. It gets warm and emits an stench of ozone when in use. 73 Joe VO1NA