Return-Path: X-Spam-DCC: paranoid 1170; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,SUBJ_RE_NUM autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tA2Estdj020783 for ; Mon, 2 Nov 2015 15:54:55 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZtGS7-0007A5-4J for rs_out_1@blacksheep.org; Mon, 02 Nov 2015 14:51:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZtGS6-00079w-SU for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 14:51:18 +0000 Received: from smarthost01b.mail.zen.net.uk ([212.23.1.3]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZtGR3-0001VD-LV for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 14:51:17 +0000 Received: from [82.70.254.222] (helo=OfficeWin7.lan) by smarthost01b.mail.zen.net.uk with esmtp (Exim 4.80) (envelope-from ) id 1ZtGQr-000Bau-Pz for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 14:50:01 +0000 Date: Mon, 2 Nov 2015 14:50:01 +0000 From: Chris Wilson Organization: Gatesgarth Developments X-Priority: 3 (Normal) Message-ID: <1687369812.20151102145001@chriswilson.tv> To: Andy Talbot In-Reply-To: References: <1887849276.20151030143118@chriswilson.tv> <5633D56C.20659.23BE4D8@mike.dennison.ntlworld.com> <316685691.20151031121552@chriswilson.tv> <56375E6E.24975.AD8B5E@mike.dennison.ntlworld.com> <1778466353.20151102134246@chriswilson.tv> MIME-Version: 1.0 X-Originating-smarthost01b-IP: [82.70.254.222] X-Scan-Signature: f38d515a9cad1e977fcfe251941a8120 Subject: Re[6]: LF: Zmag of 45.6 Ohms OK, or should I try for better? Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit 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 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4788 Hello Andy, Monday, November 2, 2015 OK, many thanks Andy, I reckon it should be ok for my purposes then, I'll wind one when I get an hour, much appreciated. > Ae is specified as 211mm^2 for that size core,  > So,  at 137kHz Mike's 16 turns with a Bmax of 0.1Tesla means : > V = 4.44.F.N.A.B =  205 Vrms > In a 50 ohm system this equates to 840 Watts > Andy  G4JNT -- Best regards, Chris mailto:chris@chriswilson.tv