Return-Path: X-Spam-DCC: paranoid 1233; Body=3 Fuz1=3 Fuz2=3 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 t28LCkTt019530 for ; Sun, 8 Mar 2015 22:12:46 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YUiSl-0006eX-RI for rs_out_1@blacksheep.org; Sun, 08 Mar 2015 21:10:15 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YUiSl-0006eO-J0 for rsgb_lf_group@blacksheep.org; Sun, 08 Mar 2015 21:10:15 +0000 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 1YUiSj-0001HA-JT for rsgb_lf_group@blacksheep.org; Sun, 08 Mar 2015 21:10:14 +0000 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 t28LA91O009232 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 8 Mar 2015 18:40:09 -0230 Date: Sun, 8 Mar 2015 18:40:09 -0230 (NDT) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: <93648AB660E745AF88A0881B781A767A@GaryAsus> Message-ID: References: <54FB40AE.6050005@gmail.com> <54FC1D83.14118.3F6233D@roelof.ndb.demon.nl> <20150308145327.00002770@tut.by> <000801d059ac$2ede9350$6401a8c0@JAYDELL> <020601d059b7$baa7f100$2ff7d300$@de> <1752D502E6794028B7FA418F464619C8@GaryAsus> <93648AB660E745AF88A0881B781A767A@GaryAsus> MIME-Version: 1.0 X-Scan-Signature: b77892ad90d0261eaf071f4f6cf31464 Subject: Re: LF: Re: LF 137777 & VLF 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: 2594 Hi Gary, Roelof, Group, Your grabber is used a lot here, Gary. Thanks for keeping it going and congrats on the daytime reception. And as of 2108 Roelof's grabber is showing clear sigs. Thanks! >From 1922 to 2007 utc the LF TX took a break for the VLF TX on 8277 Hz. Yesterday an old XR2206 was discovered in the shack and it seemed this might make a nice LO for a DC RX. A 4066 was used as a mixer and an LM386 as the audio stage. The PA0RDT MW fed the mixer. A crude design for sure, not even a diplexer to follow the mixer so the 8730 Hz LO was qite loud in the speaker. It was a lovely sunny but cold day so I put the contraption against my ear held the MW above my head with the other hand and began walking. The VLF CW beacon could be clearly heard at 0.5 km but disappeared at 0.7 km. There were all sorts of strange noises heard including the Alphas For TX, about 10 watts were fed to a 1:4 xfmr and tuned to the 100m wire (15m mean height) with about 0.35 H of very lossy inductance. DL4YHF Spectrum Lab in the DC RX mode was used in earlier experiments but it seems the computer makes much QRM. For todays test, I took the computer battery pack to power the RX and left the noisy part the shack. This the best VLF DX so far from here. It is hoped to get a few km of wire for an improved tuning coil. 73 Joe VO1NA