Return-Path: Received: from rly-md01.mx.aol.com (rly-md01.mail.aol.com [172.20.29.139]) by air-md05.mail.aol.com (v124.15) with ESMTP id MAILINMD054-8e34a5cf5672ee; Tue, 14 Jul 2009 17:15:25 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md01.mx.aol.com (v124.15) with ESMTP id MAILRELAYINMD013-8e34a5cf5672ee; Tue, 14 Jul 2009 17:15:20 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MQpKG-0003zL-DK for rs_out_1@blacksheep.org; Tue, 14 Jul 2009 22:14:12 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MQpKF-0003zC-I9 for rsgb_lf_group@blacksheep.org; Tue, 14 Jul 2009 22:14:11 +0100 Received: from fish2.hurontel.on.ca ([216.46.129.163]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MQpKB-0001Ii-TK for rsgb_lf_group@blacksheep.org; Tue, 14 Jul 2009 22:14:10 +0100 Received: from weazle (pppoe.dyn-216.46.157.96.hurontel.on.ca [216.46.157.96]) by fish2.hurontel.on.ca (Spam Firewall) with SMTP id 5BB5F983442 for ; Tue, 14 Jul 2009 17:13:59 -0400 (EDT) Received: from weazle (pppoe.dyn-216.46.157.96.hurontel.on.ca [216.46.157.96]) by fish2.hurontel.on.ca with SMTP id 01rBcsUR46dsGEw3 for ; Tue, 14 Jul 2009 17:13:59 -0400 (EDT) Message-ID: <000701ca04c8$00eec9e0$0b01a8c0@weazle> From: "J. B. Weazle McCreath" To: References: <1EDB89E6D3E24E008B4897CFE896A09F@lindavideo> Date: Tue, 14 Jul 2009 22:13:50 +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 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: Microwave oven transformers Content-Type: text/plain; charset="iso-8859-1" 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 X-AOL-IP: 193.82.116.20 Hi Ken, LFers, I've used four M.O.T.'s immersed in oil to achieve close to 9 KV to power one of my Tesla coils. I had to be sure that the phasing of the windings was right so that they added up. Of course the two on the ends where operating with their cores at 2 K.V., hence the need for the oil bath. In your case, connect the two cores together and possibly to earth, and then measure the voltage between the two high voltage leads to determine the correct phasing for the primaries. Regarding the magnetic shunts, they are easily removed with a drift punch and a few gentle hammer taps. DON'T DING THE WINDINGS! Depending on your actual usage, the type of filter you use after the rectifiers will help with the regulation. You can use a choke input configuration as shown in any ARRL Handbook. Good luck! 73, J.B., VE3EAR - VE3WZL Solar and wind powered Lowfer " EAR" 188.830 EN93dr http://www.hurontel.on.ca/~weazle