Return-Path: Received: from mtain-de01.r1000.mx.aol.com (mtain-de01.r1000.mx.aol.com [172.29.64.201]) by air-da05.mail.aol.com (v129.4) with ESMTP id MAILINDA054-86654cc42a8763; Sun, 24 Oct 2010 08:45:59 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de01.r1000.mx.aol.com (Internet Inbound) with ESMTP id CB0AC380000BC; Sun, 24 Oct 2010 08:45:57 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P9zwB-0001jH-TK for rs_out_1@blacksheep.org; Sun, 24 Oct 2010 13:44:35 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P9zwB-0001j6-Gz for rsgb_lf_group@blacksheep.org; Sun, 24 Oct 2010 13:44:35 +0100 Received: from mout8.freenet.de ([195.4.92.98]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P9zw9-0005Qt-Q6 for rsgb_lf_group@blacksheep.org; Sun, 24 Oct 2010 13:44:35 +0100 Received: from [195.4.92.15] (helo=5.mx.freenet.de) by mout8.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.72 #3) id 1P9zw8-0004IH-M5 for rsgb_lf_group@blacksheep.org; Sun, 24 Oct 2010 14:44:32 +0200 Received: from blfd-5d8238d3.pool.mediaways.net ([93.130.56.211]:1948 helo=[192.168.0.101]) by 5.mx.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1:CAMELLIA256-SHA:256) (port 465) (Exim 4.72 #3) id 1P9zw8-0006QE-Cb for rsgb_lf_group@blacksheep.org; Sun, 24 Oct 2010 14:44:32 +0200 Message-ID: <4CC42A2E.4060304@freenet.de> Date: Sun, 24 Oct 2010 14:44:30 +0200 From: wolf_dl4yhf User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.11) Gecko/20101013 Thunderbird/3.1.5 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <8d9f30f282fd4048b72494b7fc121998@kabelmail.de> <4CC30CDA.1040005@freenet.de> <4CC41ED7.5090900@iup.uni-heidelberg.de> In-Reply-To: <4CC41ED7.5090900@iup.uni-heidelberg.de> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: DK7FC's 8th VLF kite experiment Content-Type: text/plain; charset=windows-1252; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 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: G x-aol-sid: 3039ac1d40c94cc42a851460 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Content-Transfer-Encoding: quoted-printable X-Mailer: Unknown (No Version) Hi Stefan, You wrote: > > I have been 5 dB stronger than the Alpha stn on 11904 Hz at your=20 location ;-) > No, not really stronger than the Alpha's. Because the resonant loop=20 antenna has favourized 'your' frequency, and attenuated the HF stuff. The antenna itself is a slotted aluminum tube bent to a ring (=3Dgrounded= =20 shield), tube filled with 0.6 mm enamelled copper wire salvaged from=20 TV's degaussing coils. Inductance about 45 mH, resonated with 4.7 nF + 1= =20 nF + the FET's gate capacity. The loop is tapped with an 2SK369 "audio"=20 JFET, phantom-fed through the coax. I didn't measure the antenna's=20 FET-loaded Q yet. Anyway, despite that, the SNR comparison is impressive ! 73, Wolf DL4YHF (p.s. also nice reception of SAQ here, just a bit of QRN) Am 24.10.2010 13:56, schrieb Stefan Sch=E4fer: > Hello Wolf, > > I have been 5 dB stronger than the Alpha stn on 11904 Hz at your=20 > location ;-) Have you thought that this will be possible? ;-) > > 73, Stefan > > Am 23.10.2010 18:27, schrieb wolf_dl4yhf: >> Stefan's 8970 Hz signal SNR was over 20 dB with 200 uHz effective=20 >> receiver bandwidth, observed at DF0WD (rural area) with a small,=20 >> resonant, active loop antenna hanging in a tree. >> >> Screenshot here: >> >> http://www.qsl.net/dl4yhf/grabber/2010_10_23_dk7fc_at_df0wd_200uHz_FFT.= jpg=20 >> >> >> >> 73, >> Wolf DL4YHF. > > >