Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.5 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_SORBS_SPAM,SPF_PASS,T_HK_NAME_DR,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v74DcoQg011085 for ; Fri, 4 Aug 2017 15:38:51 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ddckm-0007XK-6S for rs_out_1@blacksheep.org; Fri, 04 Aug 2017 14:35:00 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ddckk-0007XB-MF for rsgb_lf_group@blacksheep.org; Fri, 04 Aug 2017 14:34:58 +0100 Received: from mailout10.t-online.de ([194.25.134.21]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1ddckg-0003UQ-Ak for rsgb_lf_group@blacksheep.org; Fri, 04 Aug 2017 14:34:57 +0100 Received: from fwd40.aul.t-online.de (fwd40.aul.t-online.de [172.20.26.139]) by mailout10.t-online.de (Postfix) with SMTP id 9575E41C3942 for ; Fri, 4 Aug 2017 15:34:53 +0200 (CEST) Received: from [192.168.1.4] (Eky9aBZUrhVRJCbXjl5aTGfB1k3zD4uQURrUgeqElENP3ivgExYD6WiMqFjlxRggGF@[31.212.58.226]) by fwd40.t-online.de with (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384 encrypted) esmtp id 1ddckZ-1R3N0i0; Fri, 4 Aug 2017 15:34:47 +0200 From: "Dr. Wolf Ostwald" To: rsgb_lf_group@blacksheep.org References: <791401561.20170803151834@gmail.com> <9eb8f313-3b17-9da7-7e3e-3d77b2137080@t-online.de> Message-ID: Date: Fri, 4 Aug 2017 15:34:49 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <9eb8f313-3b17-9da7-7e3e-3d77b2137080@t-online.de> X-ID: Eky9aBZUrhVRJCbXjl5aTGfB1k3zD4uQURrUgeqElENP3ivgExYD6WiMqFjlxRggGF X-TOI-MSGID: b2498a6e-3124-49e5-bc61-2573832e068d X-Scan-Signature: 6aac716dc074d63ee3780b79bbe46b5d Subject: Re: LF: RE: LPF for a valve based (tube based) LF amp? Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.75 Status: O X-Status: X-Keywords: X-UID: 12320 hi ! I found an online calculator that allows to set the Q and the impedance for a tank circuit. http://people.physics.anu.edu.au/~dxt103/calculators/pi_tank.php most others are only giving a resonance equation. Which is bull for the given application. 73 de wolf df2py