Envelope-to: dave@picks.force9.co.uk Delivery-date: Tue, 25 Oct 2005 00:07:14 +0100 Received: by ptb-mxcore16.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1EUBPN-0006II-T9 for dave@picks.force9.co.uk; Tue, 25 Oct 2005 00:07:14 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore16.plus.net with esmtp (PlusNet MXCore v2.00) id 1EUBPN-0006IA-Mf for dave@picks.force9.co.uk; Tue, 25 Oct 2005 00:07:13 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1EUBP9-0004pi-EM for rs_out_1@blacksheep.org; Tue, 25 Oct 2005 00:06:59 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1EUBP9-0004pZ-1O for rsgb_lf_group@blacksheep.org; Tue, 25 Oct 2005 00:06:59 +0100 Received: from smtp-out1.hurontel.on.ca ([216.46.129.246]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1EUCOG-0001jQ-JJ for rsgb_lf_group@blacksheep.org; Tue, 25 Oct 2005 01:10:09 +0100 Received: from mail.hurontel.on.ca (mail.hurontel.on.ca [216.46.129.11]) by smtp-out1.hurontel.on.ca (8.13.1/8.13.1) with ESMTP id j9ON09bM011916 for ; Mon, 24 Oct 2005 19:00:10 -0400 Received: from server (dial-177.hurontel.on.ca [216.46.128.177]) by mail.hurontel.on.ca (8.12.10+Sun/8.12.10) with SMTP id j9ON3lhN029560 for ; Mon, 24 Oct 2005 19:03:48 -0400 (EDT) Message-ID: <016a01c5d8e6$8baee5e0$54ecfea9@server> From: "J. B. Weazle McCreath" To: rsgb_lf_group@blacksheep.org References: <1811814855.20051024154952@sibru.ru> <000201c5d8e8$6574e8a0$5611f4cc@p1i5f0> Date: Mon, 24 Oct 2005 23:01:49 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Subject: LF: Toroid winding question Content-Type: text/plain; charset=iso-8859-1; format=flowed 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Hello LFers, How critical is the spacing between the windings and the core material when winding a toroidal transformer? I have a core taken from a television flyback transformer that I'd like to experiment with using different winding techniques. To simplify things, I was thinking of putting the windings onto bobbins that could quickly be slipped on and off of the core. Would I be OK with using a bobbin with 1/8 inch (3 mm) wall thickness or should I look for something with a thinner wall? Any and all comments welcome. 73, J.B., VE3EAR - VE3WZL Solar and wind powered EN93dr