Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD 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 t4FBRgNY006714 for ; Fri, 15 May 2015 13:27:42 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YtDjY-0001Cn-VF for rs_out_1@blacksheep.org; Fri, 15 May 2015 12:24:52 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YtDjY-0001Ce-HL for rsgb_lf_group@blacksheep.org; Fri, 15 May 2015 12:24:52 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.85) (envelope-from ) id 1YtDjW-0001vT-S8 for rsgb_lf_group@blacksheep.org; Fri, 15 May 2015 12:24:51 +0100 Received: from crusoe.iup.uni-heidelberg.de (crusoe.iup.uni-heidelberg.de [129.206.22.248]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id t4FBOntZ020305 for ; Fri, 15 May 2015 13:24:49 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by crusoe.iup.uni-heidelberg.de (Postfix) with ESMTP id 96656E01EB for ; Fri, 15 May 2015 13:24:49 +0200 (CEST) Message-ID: <5555D781.5060804@posteo.de> Date: Fri, 15 May 2015 13:24:49 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <5553C81D.8000606@posteo.de> <5553C9E1.6060406@posteo.de> <55548F04.8060204@posteo.de> <55551D0D.8080905@posteo.de> <55552377.70808@posteo.de> In-Reply-To: X-Scan-Signature: 64a43ebf6189d3fbac7adf77f3718769 Subject: Re: VLF: Joe on DX Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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: 3121 Hi Joe, Am 15.05.2015 04:04, schrieb jcraig@mun.ca: > Hi Stefan, > > 30 watts from an audio amp is stepped up with a 1:4 ferrite xfmr. > One end of the secondary is grounded, the other goes to 2 pie > coils wound with 3 strands of 0.08mm wire, L~450 mH R(DC)=437 Can you send me/us a picture of the coil arrangement? > > The 100m wire is about 12 m average height and the aerial current > is about 20mA, with a large uncertainty. 5 km is the best DX, > with about 10dB S/N at 3.3km. 10 dB in which bandwidth or mode? Is it CW or QRSS-3 or QRSS-120? > > I recall Markus or you posted the maths for erp vs natural noise > on 8 kHz. A reminder would be most helpful! It must have been Markus :-) > > The 10k race was most gratifying even if I couldn't catch my > pretty little physiotherapist! If i understand you correctly then i know what you mean and i can agree. A few days ago i bough a climbing gear! I bought it so i can now safely climb into my trees to mount another solar module (50Wp to south-west / 230 deg) there. It is for rising the availability of my remote receiver setup... Great fun and a good sport! 73, Stefan/DK7FC > > 73 & TNX > Joe VO1NA > > On Fri, 15 May 2015, DK7FC wrote: > >> R Joe, thanks. >> >> Now, what is your setup on VLF? Are you using a 100m wire which you >> are using for LF/MF as well? >> >> What is the effective height and what is the antenna current? How do >> you couple the TX to the wire and what is the output power? >> >> 73, Stefan >> >> Am 15.05.2015 00:29, schrieb jcraig@mun.ca: >>> [...] >>> >>> Your VLF probe design works well -- but sadly the 36km photons >>> remain elusive. >>> >>> 73 >>> Joe VO1NA >> >> >