Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w3A1kUYE023937 for ; Tue, 10 Apr 2018 03:46:33 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1f5iEI-00067A-Vu for rs_out_1@blacksheep.org; Tue, 10 Apr 2018 02:37:50 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1f5iEH-000671-Ti for rsgb_lf_group@blacksheep.org; Tue, 10 Apr 2018 02:37:49 +0100 Received: from mout.perfora.net ([74.208.4.196]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1f5iEE-0000vc-TE for rsgb_lf_group@blacksheep.org; Tue, 10 Apr 2018 02:37:48 +0100 Received: from [192.168.1.127] ([72.224.254.201]) by mrelay.perfora.net (mreueus003 [74.208.5.2]) with ESMTPA (Nemesis) id 0LhuU8-1ekQAI14i2-00nDgr for ; Tue, 10 Apr 2018 03:37:40 +0200 To: rsgb_lf_group@blacksheep.org References: <162a4797468-1db9-bdf2@webjas-vae168.srv.aolmail.net> <1UQROqZht1.1c1VdzC0S69@optiplex980-pc> <3a0c0669-018b-13a7-b56b-dd3f63fab464@n1bug.com> <197556217.20180409124931@gmail.com> <37574432-b72e-f2d1-0e85-af19dd970817@n1bug.com> <4D19B3707137430CBE04857FBA5C80B1@gnat> <1b882ae9-fede-3ec4-256e-9b068d3acf99@n1bug.com> <1539CCA16B9A4092972CB000BE4C440A@DELL4> <7606DCC26D954BD1AE881D54F9F2894A@DELL4> From: N1BUG Openpgp: preference=signencrypt Autocrypt: addr=paul@n1bug.com; prefer-encrypt=mutual; keydata= xsFNBFqj1+0BEACggWlaH8oG/AiXSUG3CeQwZ1NrVEP4U7YsA9N9XEffjCDEsnTjHF2BJSgS 2AicyomkmTGvghEHxrNFfFw07jwgJl97ae/VtNxpERPSE98mb4sPOMpJbwddioMazMDXwhKA wpg5fse+Ru8OrIT04KK919xL/pZuAP6pY6d2kVoizjJOfS71pHpiU6N6q3d9cl+w7d2LKhAE a3A1ZgDquPvn0WQlrN8K5D66xVrwTRhf1b5H4Ozl8/mMJzCeLG1ZIsDB3Pu2flwE81P8dCJA y1azwgY8pTEshVk4em/se9uRiZaDJr/qUSCf6hrV7AGa8g1jpAQDmdGpDNYMqyDqXen4jNi1 8kNFVu1BMl2vjaI8skw/YPxIxlk/0ROHYhN6SuoDq1mt4AW4FryNa7k3A8dM8Bt7udBoTv0i uw4j9R/bmh2vl/QaHRUhDco0xn2z6geWvXkKqha++vzXDrEKUuqgB85SDZPs5W/phs9p0pz1 xA61d1gn8FQJtpou5dQuAucqMo8eKQY5LUcbC+MH5pebH+M2wIuDCBmFPJHQDSPNepeaxJ4o G/HU1hrpzlgLiTTSKR8DcwtMQwYywnCTlm8MgL4jXuPzoGyKDMYyKIjC51G+3AAOJ6oXJAGR g0ehhCPtmnCGBaRlUIoUSpbgc4B+onqFKZmDiVm9CRNJhKIWrQARAQABzRZOMUJVRyA8cGF1 bEBuMWJ1Zy5jb20+wsF9BBMBCAAnBQJao9ftAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMB Ah4BAheAAAoJECRS/J8srRGjPBsQAIh+Haz9gqrQJ0OlMI5xmQ0A5nsVWcatWF/Ea4mucNjL 4n4jmW+Z4Ukn3OVss55chWwrOVMRNWU2d2zRc92ZF7yJhLCoJFV870bZfxNYwdJ3GEBLIu6/ anmQYX0oXFx8UBsx5K6egNqbeflPA7zrLiQkWrz6JApECdiA1rHDjyJdS7PDxBCG9cKgr/5b r4Rn/JlUl9pRPnxlSwHXsV+J6JtFYtWI69MWIVD7Y7OY1wO9+684uOnzeDANzeIwpBDcSm6p 0D5u0b1hfPl2TD0ozVs6P0NvxkMbimXUhRR1QD0FvydyxmZTLAo+XZDGR8GqWYrYrauoRZ1h 3m23+bNT2T4AuoFnWekpsZu+sxIf0LKPtEZCa51O65jZ810ROpXg9Lx71gEoQD+kbjO69+kq 9r7wjytDq/jyhpOGrGYV6kgcQrISY86t9YvkA9Of2HDzZLih3GwecW6fkeV1AO5w4RteE9nL zIs2siGw2YqavF6LpTH71Db7cUYyZWn5hkKpwfpLNnPEuqgZACovpH1WUHx+KMqqIL4rMVCH GcSLqnH2KF4cEDb6OeTbwuLfpGlN+I3j24eQnB2uz5rDa7/IBjsClLl8S/wdDTP8IikBGixX 06v3k06tk/OF4UsfJ0cY/ASGP5+kjT4ASMZAIikwVMpKi5A5be77vecKNYlJQ2a6zsFNBFqj 1+0BEACaujZXo3F17v7QTnub4DjjYvm+nr8J0uU5pPc1UMEz9eWjmtmITm15fx1hPKNtVW+I VlT+DG+ShNnYmO2M4CFBoc7PwkAOc70aDxfHz20kotvj1HhXG7oBiqPkN3TK4C7qWV1HUEPA V960qPdhsoCqmtkvNwj39w1T0ZR5qwwaqDogs9UwBib7zseQ3OXHG32xYYCMcxM35hgXGkkz R7wFL4ZnAPOeFb8LnWtZcrGpwXdsYkXuCxm+A+u9KlFY+w3ZCzZt1F9Ie+/PSZnFIUtbXt2i mfc+VkRwOLz5BDAeWuDL09TN81+gbrR3kXlymDcCbuduO/yHOQK085qzE3LuImdy+JNb7oDf 1C/hvpRvtB02vVy33rzIXT8644SJzFY/mw/W39/BgHKCoL1FrBbfgf0UoIFw5M752i7jQwmv j5yFfnVAXIPpCuusMwWMGVpZcGV7QxJxh0HBEhYgOo9v3zKwzNIPm9V/LA67u/rj4a/MlCE0 mpd6IHaePE1vXDaboPZHZdhAziru5/Jd7KQI0k+HmM/HRANPRNDZ4UeBpgj9PzS6hDN5GHlZ fRUbI8JAg9wSaQtEn0bjyaR7lw0yngZTvvjT1Qqt5zGwm1IAall2STes5xK0aS7p+UJJMVbf ydZ5VOnocvUkwYxbiqoyuVtGxi4tpWW9CRstYXMkAwARAQABwsFlBBgBCAAPBQJao9ftAhsM BQkJZgGAAAoJECRS/J8srRGjTDMP/18q7uhac/naxoFsOqhgXIlvaPgu6GX7s/QOh+bcSV1F y50lxo51P/C95H2TVME/CtCjk2xWQcNjWtXloMEsZpl7T3qWgJHvyZYkDtgh3M6UNY+zb08U K9E2+rR0AZ6zdMKio7Z1xA9BtbUpSZpvy2NgjoYVqo35NllUWMZJq0u+88PvE5WeCIqLipNI EZmUcG9UwolQbPkrRc42ReL+bFbuXGXDA5GbQ0RudXbugI8iUwaw3ftaKElIZtuHW0hw1VrU 9tVHsxKyEoKgNNT1hr+dgRmvCHmA87Pi4R5cMV0ZkLVOYfPX1motedag7HmSNPi2PkYLts4z kyvPEJe2IvaPvjvK1ShRWWgje3uytrhfwyjUZcIuA76RWEfBbwT2Mbrn9O7LvrYtbTiTlsLo Zdk2uocuefBvPd2oI7mTn5eLy/VDy2JVnlb9vpZZhriXI4KtCcP6mYyuPxlxqj/30Kn1fU5b C4EpnKy6hW1CHM42DbwzT+ChjBpFbX9bfwT4qn6d42+T4mN5wkmfnBRHfcn8Wf1ezRSK3Ome Esa3ZDssj23CZHe11uec6Ln14qoB7JyRT9qM3Q99tzvAlmWFM3GrSsG94g4JponQjQWHmr8B eMYezwJHzSI7zWElJpzs/OuohstTYfYTy16FygUOEinc1K4ywjEklgRpXRtjKvqc Message-ID: <6832cf3c-a6e3-7b11-79dd-95f42cd9bcee@n1bug.com> Date: Mon, 9 Apr 2018 21:37:37 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <7606DCC26D954BD1AE881D54F9F2894A@DELL4> Content-Language: en-US X-Provags-ID: V03:K1:cV2d1BVgEXHvPAXeH68lntoAdqnZMftbfcYIHrXtDbnv8oe83Jq 8AoNW4fw73KQdMR5nIfVNc1khKgYyIGjwO251Ift7Yx/g5g57ZFd6ckGePE+Zu2DDQ+vW0H Sux+KZLGUIzdJ1UE7l8Y4n8pnU/AOZWNUKkefdAlaeNhMlyjh9hzD+GGEXVecEHma4zNbEv QcqwsRKmCeGii2qeHJX+A== X-UI-Out-Filterresults: notjunk:1;V01:K0:dRcboASEzww=:iev9kII+mX1WkBrKX79DBo 0PCZC95eyReRAzjYACsspkTIci9gEDH1e0JQWcSkD1vZG4EA7yzVWju0EDl0x1iAOQfedISRx nzMKEqKlSsyN4YmLb7zKN6ykNVFwRZYWfdIAzvJ1RdnWof66v/rUEwB2kCVv8/VII7s4aCYB3 HmnjHntRb/26uDM3gegTLM0P2kPRgknJ4kIDhyblsjNzuDn1srL37WFIt9Z61uFU/Cjff5aAW l/NmGMnOG18pNoElt9KhJVend8sZX5lV8+rIrBpfe9fD9O7jzDUgW24d3Z5igAcm0t8XJcpCL fCzFmPTRDbNEKIFmDEBfhEVbtMAGMt/wv+QM77zgkQKiBujXoKdBrnpCFEPHM/OKa+tfRQI8e smpXozjhy+C9VCM9ipbXE2jn8rHhxSigEL6h+3LY0teZRrV7Ny4nJO/gf/KHmjLEA9ZcKDgdV Xc/+DzP9eoOiEdIUF5w3jjtXBUdFddLVLM+pZZEj7qxRypm7DUHHuWmNb2q+BsA0ByZKrnzDi 6So2s2T80Cl1oDiz1JB/IAB0M6kHzKr6qr/QO34+pG1jE7J+g7UByDFZfmXiMighMfJ6+xs9C dtzVAk/I3R/t3b327TXGChARrtzEhA5BSfwTWuQm1/b+t5d4GicYLWioR8+wMpCGupS2POexN MticSK0v0ik96uY1nyD/Bm1phdDfcRZq1wRInXCBYkhrPc6/aE/ySq0CQDvg0rxMYuWCND+Tr WvDYopcHUCByvIG3bga8nkoM8A5arwVbjaLl5W485cOS1MeLV0+4c+uSVdE= X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: The core is 78 material. I tried again with different wire. The winding is somewhat tighter on the core but definitely not what I was hoping for. Clearly I am not bringing required skills to the table on constructing this. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- X-Scan-Signature: 6ffbd2c9950b634d6cc91f9565b01a8b Subject: Re: LF: W1VD amp help - more waveforms Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit 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 The core is 78 material. I tried again with different wire. The winding is somewhat tighter on the core but definitely not what I was hoping for. Clearly I am not bringing required skills to the table on constructing this. Drain waveforms became somewhat asymmetrical with one phase having a somewhat different shape from the other but peak voltage was similar... 65V on one side, 63V on the other with 13VDC supply. I'm sure this was a bad idea but out of curiosity I tried adding another 500 pf in parallel with the 1500 pf snubber cap on one side only. Power output and efficiency did not change but peak voltage on that side dropped a couple of volts. I then increased that side to a total of 3000 pf. Power output and efficiency has still not changed at all but peak voltage on that side is down to 50V and it stops ringing significantly sooner than the other side. Does this suggest anything other than insanity of the builder? Paul On 04/09/2018 05:29 PM, jrusgrove@comcast.net wrote: > Paul > > Maybe try some 14 or 16 gauge lamp cord ... it's pretty pliable and can be wound tight against the > core. That's what I used in the 500 watt deck. Put a piece of wet paper towel around the insulation > when soldering to prevent 'melt back'. > > Is your core 77 or 78 material? > > On your driver board ... are there reasonably wide traces ... especially from the 12 volt power > supply to the IR2110? Peak currents can be high driving the gate C. Is the 12 volt supply reasonably > stout? > > Jay W1VD