Return-Path: Received: from rly-mf07.mx.aol.com (rly-mf07.mail.aol.com [172.20.29.177]) by air-mf10.mail.aol.com (v121_r4.4) with ESMTP id MAILINMF103-9704925b04867; Thu, 20 Nov 2008 13:45:39 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mf07.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMF076-9704925b04867; Thu, 20 Nov 2008 13:45:30 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1L3EW9-0008T6-Fn for rs_out_1@blacksheep.org; Thu, 20 Nov 2008 18:44:41 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1L3EW8-0008Sx-5q for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2008 18:44:40 +0000 Received: from smtpout06-04.prod.mesa1.secureserver.net ([64.202.165.227] helo=smtpout06.prod.mesa1.secureserver.net) by relay3.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1L3EW6-00064J-Fb for rsgb_lf_group@blacksheep.org; Thu, 20 Nov 2008 18:44:40 +0000 Received: (qmail 31489 invoked from network); 20 Nov 2008 18:38:19 -0000 Received: from unknown (64.206.3.50) by smtpout06-04.prod.mesa1.secureserver.net (64.202.165.227) with ESMTP; 20 Nov 2008 18:38:17 -0000 Message-ID: <4925AF3A.3060900@w1tag.com> Date: Thu, 20 Nov 2008 13:40:58 -0500 From: John Andrews User-Agent: Thunderbird 2.0.0.18 (Windows/20081105) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <19730.192.87.3.13.1227198607.squirrel@webmail.xs4all.nl> In-Reply-To: <19730.192.87.3.13.1227198607.squirrel@webmail.xs4all.nl> X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: 3C85/90 Toroids 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-IP: 193.82.116.20 X-Mailer: Unknown (No Version) W1VD and I have used Micrometals iron powder type 2 cores in low pass filters at 137 and 505 kHz. I had trouble with heating on type 3 cores, but the greater number of turns needed for the type 2 fixed the issue. Here's a link to Jay's setup: http://www.w1vd.com/LPF.html John Andrews, W1TAG