Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w7NCXfot011343 for ; Thu, 23 Aug 2018 14:33:42 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fsoiA-0005v9-SI for rs_out_1@blacksheep.org; Thu, 23 Aug 2018 13:27:38 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fsohu-0005v0-FR for rsgb_lf_group@blacksheep.org; Thu, 23 Aug 2018 13:27:22 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fsohs-0004UO-BM for rsgb_lf_group@blacksheep.org; Thu, 23 Aug 2018 13:27:21 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 6CB9F20F14 for ; Thu, 23 Aug 2018 14:27:19 +0200 (CEST) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1535027239; bh=IRViZ0iAnkNQ4lLZlMpToE0rAM41VIBod4aVw6sUVUE=; h=Date:From:To:Subject:From; b=rOcUK0cqEIXolmf0JDU21nEMwV5Ks8S8Dqsx3AkSnoXLdFS0Hshl28ik9TKDwCLcG N2rZ9a8TvF9B43ZJMQ84EiXseacch+HEM79Y7+UQeidQJMByJ59EfqyXWb3GaWvbFC sy932Z/RVj5GauVDxP5nppmqwW3/ZtXjBzxHF9oWubieT/Hwtt73ZslgOrsCK2sGvt RkGmFRGIKA1jf1MCV+sUogrh2ySLHWI0iFlj4cg11LCiTbunUKuy/VmhIs7POl64Rv svTPDzNT8IrN0O5a5kLQF1IY99jRQ0FDrMgxjfz9ijM/a247W6qIWMS04vmlas6o+8 IHDoHoEbdCKyw== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 41x3ZZ6LL2z9rxF for ; Thu, 23 Aug 2018 14:27:18 +0200 (CEST) Message-ID: <5B7EA826.5000906@posteo.de> Date: Thu, 23 Aug 2018 14:27:18 +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: <1613303827.20180823120801@gmail.com> <5B7E9BB0.7000307@posteo.de> In-Reply-To: <5B7E9BB0.7000307@posteo.de> X-Spam-Score: -2.5 (--) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Ehm sorry, rather add 400 pF. I just calculated (150/137)^2 ~ 1.2, i.e. you need 1.2 times more C, or 2.4 nF. 73, Stefan [...] Content analysis details: (-2.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.66 listed in list.dnswl.org] -0.2 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [185.67.36.66 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 4e3b1488273adbbe9757d6bdd5adf219 Subject: Re: LF: Anyone good with Elsie? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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 Ehm sorry, rather add 400 pF. I just calculated (150/137)^2 ~ 1.2, i.e. you need 1.2 times more C, or 2.4 nF. 73, Stefan Am 23.08.2018 13:34, schrieb DK7FC: > Hi Chris, > > Add some C across the other Cs. If you have 2 nF currently and the > frequency is at 150 kHz, then try to add 200 pF. Just try it out, > forget the simulations. > > 73, Stefan > > Am 23.08.2018 13:08, schrieb Chris Wilson: >> >> Hello LF'ers >> >> Is anyone able and willing to advise on my band pass RX filter design >> please? I have made a band pass filter for 137kHz reception and >> checked it with my SDR in real time. It is shifted a little high and I >> am wondering what I need to change to pull it a bit lower? Any >> practical advice or component values welcome. Adjustability would be >> nice! Thanks >> >> Filter design is at http://www.chriswilson.tv/lf-circuit.jpg >> >> Real world results at : http://www.chriswilson.tv/passband.jpg >> >> ELSIE plot at : http://www.chriswilson.tv/lf-plot.jpg >