Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Wed, 9 Sep 2020 21:52:42 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 08A4glkU027960; Thu, 10 Sep 2020 00:45:32 -0400 Received: from outgoing-exchange-5.mit.edu (OUTGOING-EXCHANGE-5.MIT.EDU [18.9.28.59]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 08A4gHCG027828 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Thu, 10 Sep 2020 00:42:33 -0400 Received: from oc11exedge1.exchange.mit.edu (OC11EXEDGE1.EXCHANGE.MIT.EDU [18.9.3.17]) by outgoing-exchange-5.mit.edu (8.14.7/8.12.4) with ESMTP id 08A4gGhP008694 for ; Thu, 10 Sep 2020 00:42:17 -0400 Received: from w92expo16.exchange.mit.edu (18.7.74.70) by oc11exedge1.exchange.mit.edu (18.9.3.17) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Thu, 10 Sep 2020 00:42:15 -0400 Received: from oc11exhyb2.exchange.mit.edu (18.9.1.98) by w92expo16.exchange.mit.edu (18.7.74.70) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Thu, 10 Sep 2020 00:42:16 -0400 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.176) by oc11exhyb2.exchange.mit.edu (18.9.1.98) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Thu, 10 Sep 2020 00:42:16 -0400 Received: from DM5PR07CA0168.namprd07.prod.outlook.com (2603:10b6:3:ee::34) by BYAPR01MB3798.prod.exchangelabs.com (2603:10b6:a02:90::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16; Thu, 10 Sep 2020 04:42:15 +0000 Received: from DM3NAM03FT014.eop-NAM03.prod.protection.outlook.com (2603:10b6:3:ee:cafe::ed) by DM5PR07CA0168.outlook.office365.com (2603:10b6:3:ee::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16 via Frontend Transport; Thu, 10 Sep 2020 04:42:14 +0000 Received: from mail-ej1-f46.google.com (209.85.218.46) by DM3NAM03FT014.mail.protection.outlook.com (10.152.82.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16 via Frontend Transport; Thu, 10 Sep 2020 04:42:14 +0000 Received: by mail-ej1-f46.google.com with SMTP id q13so6696452ejo.9 for ; Wed, 09 Sep 2020 21:42:14 -0700 (PDT) From: Ryan O'Connor To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Wed, 9 Sep 2020 21:42:01 -0700 Subject: Re: [EE] Microwave Oven Transformers Thread-Topic: [EE] Microwave Oven Transformers Thread-Index: AdaHLjfscxxiUTBtT0mmavTwkl56ag== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.218.46 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.218.46; helo=mail-ej1-f46.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=W7Ct1gSSlOcp0lB4ccf5Lr25CE1Qb8stJlRWkhwX7Q8=; b=D6p1hUrp5VCalFH2nKiP1fKSQLPSuQQtJm0gBuVMGYnmlDT4YPC/uIUvoW7ZsUIOUU FrPIeb6qXTYaABRixfpZ399NjnwnxzrtSHXu4Z6E06jxs6hqOG1rtumrdFrdP5T47kMO rLmxjhm128lNNTkt/UTSu8d2dYpDt1fLwj98F8RiPkzAhKvheSsooQp9/D4HYjgCA/PE f8ZnAZzZO8ozkl24RYwSDNLeMT50qHUM0x3IcicVoNe0kjx99Y0J0OCe5ST8Weh35i+J r2AIhWg/4w6gIjuDkcDH8zT3brxc+IlFAD/NtrrWArOksYeXVY80Is0xJnMlvWc67Wd4 71lA== authentication-results: spf=pass (sender IP is 209.85.218.46) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com; mit.edu; dmarc=pass action=none header.from=gmail.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a17:906:d182:: with SMTP id c2mr6796535ejz.378.1599712933471; Wed, 09 Sep 2020 21:42:13 -0700 (PDT) x-topics: [EE] x-content-filtered-by: Mailman/MimeDel 2.1.6 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 That's not many turns. What are you going to use it for? On Thu, 10 Sep 2020 at 16:35, Bob Blick wrote: > Quick update. Here's the almost finished inductor made from a microwave > oven transformer. Right now with a gap of about 0.5 mm the inductance is > about 1 millihenry. I will probably double to 1 mm which should lower the > inductance by about 30 or 40 percent. Although I could weld it together a= s > it was originally, I will just use the clamp as shown. The top plate is t= wo > pieces of wine barrel hoop butt welded together. > > Final number of turns is 25. Wire is 4 pieces of #12 AWG copper wire > wrapped in more than 20 meters of 20mm wide polyimide tape. > > Hand and cat to show scale. > > Bob-- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .