Return-Path: Received: (qmail 19530 invoked from network); 11 Jun 2002 13:52:25 -0000 X-Priority: 3 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 11 Jun 2002 13:52:25 -0000 X-MSMail-Priority: Normal Received: (qmail 10640 invoked from network); 11 Jun 2002 13:51:53 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 11 Jun 2002 13:51:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17Hm0h-0008In-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 11 Jun 2002 14:48:35 +0100 Received: from imo-r09.mx.aol.com ([152.163.225.105]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17Hm0g-0008Ie-00 for rsgb_lf_group@blacksheep.org; Tue, 11 Jun 2002 14:48:34 +0100 Received: from G0MRF@aol.com by imo-r09.mx.aol.com (mail_out_v32.5.) id l.11c.12686467 (3999) for ; Tue, 11 Jun 2002 09:47:58 -0400 (EDT) From: G0MRF@aol.com Message-ID: <11c.12686467.2a37598e@aol.com> Date: Tue, 11 Jun 2002 09:47:58 EDT Subject: LF: Core efficiency To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows UK sub 10512 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit In a message dated 6/11/02 2:09:19 PM GMT Daylight Time, g4jnt@thersgb.net writes:

Thought it felt a bit dubious, but I hadn't got the core loss information
available so couldn't justify the feeling. Anyway, isn't 2 mix - the red
coloured one - the wrong material for this frequency ? I thought that was
meant for the 2 - 20 MHz region.

I tried the -3 material which is the next material up from the -2 with slightly higher permeability. Even with fewer turns of larger diameter wire, the losses were 50% up on the T225-2.

73

David GOMRF