Return-Path: Received: from mtain-de09.r1000.mx.aol.com (mtain-de09.r1000.mx.aol.com [172.29.64.209]) by air-md09.mail.aol.com (v129.4) with ESMTP id MAILINMD093-8b964c03d27932d; Mon, 31 May 2010 11:15:05 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-de09.r1000.mx.aol.com (Internet Inbound) with ESMTP id 56E51380000AC; Mon, 31 May 2010 11:15:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OJ6gj-0002HF-UP for rs_out_1@blacksheep.org; Mon, 31 May 2010 16:14:01 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OJ6gj-0002H6-Ix for rsgb_lf_group@blacksheep.org; Mon, 31 May 2010 16:14:01 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OJ6gi-0007wY-M6 for rsgb_lf_group@blacksheep.org; Mon, 31 May 2010 16:14:01 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id o4VFDdG8008414 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 31 May 2010 17:13:39 +0200 Received: from [129.206.29.99] (pc99.iup.uni-heidelberg.de [129.206.29.99]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id o4VFDxqg028057 for ; Mon, 31 May 2010 17:13:59 +0200 Message-ID: <4C03D21E.4090902@iup.uni-heidelberg.de> Date: Mon, 31 May 2010 17:13:34 +0200 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <20100530.082855.1608.1.riese-k3djc@juno.com> <4C02783D.9020502@gmx.com> <4C0326F4.5050609@gmx.com> <4C03CD6E.9020906@iup.uni-heidelberg.de> <4C03CF6B.5040909@gmx.com> In-Reply-To: <4C03CF6B.5040909@gmx.com> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: 8.97kc - TV transformer info needed Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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-global-disposition: G x-aol-sid: 3039ac1d40d14c03d27665ee X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Hi Mike, Just count the number of turns you used and multiply the number by 0.65. This is the new number of turns. Or, remove 35% of the turns ;-) 73, Stefan Am 31.05.2010 17:02, schrieb Mike.WE0H: > Hi Stefan, > > How many turns should I wind for a primary side? 8 to 10 maybe? > I was using a 48.4 milli-henry primary winding with the secondary at > 4.2 henry. There are many primary windings on this transformer but > this 48.4 milli-henry winding gave me the highest output voltage on > the secondary. 300v p-p with only .7v p-p input. > > Mike > WE0H > > > > Stefan S wrote: >> Mike, >> >> Try to use just 65 % of the turns of your primary winding and i bet >> the optimum will be on 9 kHz! :-) >> >> 73, Stefan