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 w7NCZZfK011351 for ; Thu, 23 Aug 2018 14:35:37 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fsolh-0005x2-GI for rs_out_1@blacksheep.org; Thu, 23 Aug 2018 13:31:17 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fsolh-0005wp-60 for rsgb_lf_group@blacksheep.org; Thu, 23 Aug 2018 13:31:17 +0100 Received: from mail-ed1-x535.google.com ([2a00:1450:4864:20::535]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fsole-0004VD-Dr for rsgb_lf_group@blacksheep.org; Thu, 23 Aug 2018 13:31:16 +0100 Received: by mail-ed1-x535.google.com with SMTP id f38-v6so3479980edd.8 for ; Thu, 23 Aug 2018 05:31:14 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=oCwM+KJEXDMrkVOVaU6DEkbS2+T6J0IHp97GAJPsoWA=; b=SVXtmXiw1hcPwCFtxK5INb5UFU4m9NcedtsnsY/e6h9iQ8SzKZDn2eMtJvPHp7UBgW veS3GEKiu+lgfMNUvkIIIl5vt4POzUg01U7+P+557gcw9n0YYK9EOsDR4+RSW+yqslnz v0ugYnjVKBClsHIqU8dO6MiZqyhYUH2p8D5YBWN0Xj/wVieoc8VSNGVCSrYp3geul3V/ VuPqx1c4CTQzxnZPWFh231dBo0UVfDHLd/d8zwL1l9+Jo52OqQaaso6SPVVS2QiiWas0 VbuIobVDV5gXP4q42NXTaA9gvx6x2ybS3G5iqwz5ZDRMZIqCZoSjRSyI1nvXdwz7kkqG AOTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=oCwM+KJEXDMrkVOVaU6DEkbS2+T6J0IHp97GAJPsoWA=; b=R6MiGFI5o9mT8uoSILgk5FZWHXWz62HLFoNyINgaMg1YtWg9qzgCxwndg5z26KjihB 4mAXaorIhT9w6JA1qgi9St1Um7qk4TTZf9jpx5yUYsmj9KLuqgtEZojIdhBj9fAaep9Q K+nS2p8fW0SLExx7Eg/hIHbUhq878Od53sH86+nsZYLw+Kg7Zsnn37e+1W7YKESfyj/D mXsKxIXxhmt9uqQJ11CzyiIWY3dO+Yu0Myb63PELPBfNSYLdtKXw54k4lt7PRdABpM+m qGzKrTEkRlmhG8gxaBc+g45OMVnJv9UYT/VrPw9l0IO21TzUEKk+bXvV2uhUUfa6ezsc 7hMg== X-Gm-Message-State: AOUpUlHNRefppmfWdDQUTbefzBCRXgIq94SfcQkJDMP3CKQyPYbmLln5 T+P12kBB71qZCvIJ/4yzwvDs9x8/nd8XK4SV5VO5yg== X-Google-Smtp-Source: AA+uWPxY7f2crfiw9mUdmLV8UR6Tcx/t+VczeSFRlKiu9y45X+A2ni+q2OsWHC5k9NDTUoZfSmWdFdQZRLjKgHXZFyI= X-Received: by 2002:a50:8612:: with SMTP id o18-v6mr22516436edo.111.1535027472667; Thu, 23 Aug 2018 05:31:12 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a50:9626:0:0:0:0:0 with HTTP; Thu, 23 Aug 2018 05:31:12 -0700 (PDT) In-Reply-To: <1613303827.20180823120801@gmail.com> References: <1613303827.20180823120801@gmail.com> From: Andy Talbot Date: Thu, 23 Aug 2018 13:31:12 +0100 Message-ID: To: LineOne X-Spam-Score: 1.0 (+) 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: The caps are likely to be close to their proper value ], which leaves the values of the inductors. You have E12 preferred values so guess you're using ready made L components. They may be specified at a different frequency, a different mounting etc. all of which affect their value. If you can't adjust the inductance, frig the caps, as Stefan suggested. [...] Content analysis details: (1.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:535 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (andy.g4jnt[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 1.0 FREEMAIL_REPLY From and body contain different freemails X-Scan-Signature: 69d86b33142413363dd56bd312139bf4 Subject: Re: LF: Anyone good with Elsie? Content-Type: multipart/alternative; boundary="0000000000003a98170574196f80" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE 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 --0000000000003a98170574196f80 Content-Type: text/plain; charset="UTF-8" The caps are likely to be close to their proper value ], which leaves the values of the inductors. You have E12 preferred values so guess you're using ready made L components. They may be specified at a different frequency, a different mounting etc. all of which affect their value. If you can't adjust the inductance, frig the caps, as Stefan suggested. I checked the design using ADDE - got the same frequency response plot Andy www.g4jnt.com On 23 August 2018 at 12:08, Chris Wilson wrote: > > > 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 > -- > Best regards, > Chris mailto:dead.fets@gmail.com > > > --0000000000003a98170574196f80 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
The caps are likely to be close to their proper value ], w= hich leaves the values of the inductors.
You have E12 preferred values = so guess you're using ready made L components.

They may be specified at a different frequency, a different mounting etc. = all of which affect their value.=C2=A0 =C2=A0If you can't adjust the in= ductance, frig the caps, as Stefan suggested.

I ch= ecked the design using ADDE - got the same frequency response plot=C2=A0


On 23 August 2018 at 12:08, Chris Wilson <dead.fets@gmail.com> wrote:
http://www.chriswilson.tv/lf-circui= t.jpg

Real world results at : http://www.chriswilson.tv/passban= d.jpg

ELSIE plot at : http://www.chriswilson.tv/lf-plot.jpg<= br> --
Best regards,
=C2=A0Chris=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 mailto:d= ead.fets@gmail.com



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