Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 51B9E38000098; Thu, 13 Sep 2012 07:30:08 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TC7bS-00033J-Cq for rs_out_1@blacksheep.org; Thu, 13 Sep 2012 12:29:02 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TC7bR-00033A-ST for rsgb_lf_group@blacksheep.org; Thu, 13 Sep 2012 12:29:01 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1TC7bP-0007Jf-Nx for rsgb_lf_group@blacksheep.org; Thu, 13 Sep 2012 12:29:00 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id q8DBSwuR002894 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 13 Sep 2012 13:28:58 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id q8DBSw6F027930 for ; Thu, 13 Sep 2012 13:28:58 +0200 Message-ID: <5051C2B6.8080303@iup.uni-heidelberg.de> Date: Thu, 13 Sep 2012 13:25:42 +0200 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= 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: <5050EA23.1040802@iup.uni-heidelberg.de> <62B8952382DF4DB294DF41CA351C4188@Notebook> In-Reply-To: <62B8952382DF4DB294DF41CA351C4188@Notebook> X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id q8DBSwuR002894 X-Spam-Score: -2.8 (--) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Ah yes, Thomas was faster, damn ;-) Another image from the experimental setup, using source followers https://dl.dropbox.com/u/19882028/MF/Mechanical_filter_with_source-followers.JPG The results have been very good last night! [...] Content analysis details: (-2.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [129.206.210.211 listed in list.dnswl.org] -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 1bc6486c2865e7dc2ff7578e6d7fc226 Subject: Re: LF: Re: RE: MF tonite Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable 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: 3039ac1d40d65051c3bf7f54 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Ah yes, Thomas was faster, damn ;-) Another image from the experimental setup, using source followers=20 https://dl.dropbox.com/u/19882028/MF/Mechanical_filter_with_source-follow= ers.JPG The results have been very good last night! 73, Stefan/DK7FC Am 13.09.2012 13:12, schrieb Thomas Rosenkranz: > Hy Ken, > > the name of the mechanical filter is FZ02=20 > http://www.oppermann-electronic.de/html/hf-spezialbauteile.html > > http://dm4tr.bplaced.net/index.php?section=3DReceiver > > 73 > Thomas DM4TR > > > ----- Original Message ----- From: "Ken" > To: > Sent: Thursday, September 13, 2012 10:28 AM > Subject: LF: RE: MF tonite > > > Hi Stefan. > What mechanical filter are you using?. > 73. > Ken > M0KHW > > -----Original Message----- > From: owner-rsgb_lf_group@blacksheep.org > [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Stefan Sch=E4f= er > Sent: 12 September 2012 21:02 > To: rsgb_lf_group@blacksheep.org > Subject: LF: MF tonite > > Christian, > > Are you QRV tonite? I would like to see or better hear the difference o= f > my RX performance when using my band filter i was testing in the=20 > afternoon. > > It is the mechanical filter which uses source followers at the input an= d > output, to provide a constant accurate impedance matching to keep the > passband ripple as low as possible. The afternoons tests have been very > promising, see https://dl.dropbox.com/u/19882028/MF/MF%20Filter.png > This is the frequency response: > https://dl.dropbox.com/u/19882028/MF/473%20kHz%20ZF%20Filter%2040%20dB.= png=20 > > > There should be a much better image rejection now and so maybe a few > more dB SNR... Unfortunately the filter does not cover the 502 kHz > region. But this problem will be gone in some months... > > Will be on 472.5 kHz soon. > > 73, Stefan/DK7FC > > Am 12.09.2012 21:01, schrieb C. Groeger: >> Thanks, mal for these wise words! >> Df5qg (Homebrew& CW) >> >> Christian Groeger >> >> mal hamilton schrieb: >> >> >>> Never replace the MORSE KEY, you do at your peril !! >>> Other modes come and go but MORSE lives on >>> All Radio Operators know this. >>> >>> G3KEV >>> >>> > >