Return-Path: Received: from mtain-me06.r1000.mx.aol.com (mtain-me06.r1000.mx.aol.com [172.29.96.142]) by air-mc08.mail.aol.com (v129.4) with ESMTP id MAILINMC083-a98d4be8641387; Mon, 10 May 2010 15:52:51 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-me06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 2499D380000E3; Mon, 10 May 2010 15:52:50 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OBZ1E-000148-HS for rs_out_1@blacksheep.org; Mon, 10 May 2010 20:52:00 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OBZ1E-00013z-5P for rsgb_lf_group@blacksheep.org; Mon, 10 May 2010 20:52:00 +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 1OBZ1B-0001wn-LN for rsgb_lf_group@blacksheep.org; Mon, 10 May 2010 20:52:00 +0100 Received: from paranoid.lipkowski.org (localhost [127.0.0.1]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id o4AJpuTR019643 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 10 May 2010 21:51:56 +0200 Received: from localhost (sq5bpf@localhost) by paranoid.lipkowski.org (8.13.7/8.13.6/Submit) with ESMTP id o4AJpujn019640 for ; Mon, 10 May 2010 21:51:56 +0200 X-Authentication-Warning: paranoid.lipkowski.org: sq5bpf owned process doing -bs Date: Mon, 10 May 2010 21:51:56 +0200 (CEST) From: Jacek Lipkowski To: rsgb_lf_group@blacksheep.org In-Reply-To: <4BE855F1.9050909@iup.uni-heidelberg.de> Message-ID: References: <4BE855F1.9050909@iup.uni-heidelberg.de> 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: LF: RE: 8,97 kHz active antenna circuit and pictures Content-Type: MULTIPART/MIXED; BOUNDARY="17435139-1771119820-1273521116=:9022" 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: S x-aol-sid: 3039ac1d608e4be864127f5d X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --17435139-1771119820-1273521116=:9022 Content-Type: TEXT/PLAIN; charset=iso-8859-2; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Mon, 10 May 2010, Stefan Sch=E4fer wrote: > PS: I have built a small TX antenna at my new home QTH in Heidelberg. Wi= th a=20 > TV transformer and my 300W PA (running at 15W DC input) i apply about 2k= V rms=20 > on a 10m horizontal wire, about 3m above gnd. The distance to the grabbe= r=20 > here is 1,1km. Hopefully i can see something, at least in DFCW-600... i've tried a tv transformer with a 40m horizontal longwire and abt 3W=20 input. the signal can clearly be seen on a mobile receiver 1.3km away from= =20 the antenna: http://acid.ch.pw.edu.pl/~sq5bpf/ham/vlf/sq5bpf_vlf_test_20100406.jpg so you will surely receive it with a better rx (the receiver here is a=20 crude bf245 active antenna + lowpass). since then i've improved the=20 distance by some 300m. i didn't post it to the list, because i hoped to optimize the setup, hope= =20 to be able to run higher power. VY 73 Jacek / SQ5BPF --17435139-1771119820-1273521116=:9022--