Return-Path: Received: (qmail 99233 invoked from network); 24 Jan 2004 19:45:53 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 24 Jan 2004 19:45:53 -0000 Received: (qmail 70506 invoked from network); 24 Jan 2004 19:45:53 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 24 Jan 2004 19:45:52 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim) id 1AkTj5-000IEG-Rr for dave@picks.force9.co.uk; Sat, 24 Jan 2004 19:45:51 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AkTil-00012k-Dd for rs_out@blacksheep.org; Sat, 24 Jan 2004 19:45:31 +0000 Received: from [213.40.2.14] (helo=gourd.sout.netline.net.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1AkTik-00012R-Hd for rsgb_lf_group@blacksheep.org; Sat, 24 Jan 2004 19:45:30 +0000 Received: from [213.40.201.76] (helo=taylormade) by gourd.sout.netline.net.uk with smtp (Exim 4.24) id 1AkTiF-0007NW-4c for rsgb_lf_group@blacksheep.org; Sat, 24 Jan 2004 19:44:59 +0000 From: "G4WGT - Gary" To: rsgb_lf_group@blacksheep.org Date: Sat, 24 Jan 2004 19:45:14 -0000 Message-ID: MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal In-reply-to: <000d01c3e212$ba8e9120$73338751@rogersservices> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: RE: 137 kHz project......Handy cost-saving tip Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit

Hi Jim & LF,

I am using a core from a VGA computer monitor scanning coil yoke for the core in my LF antenna matching transformer wound with 2.5 mm mains wire with 10 turns primary & 20 turns secondary (tapped every other turn from turn 10), for matching to the loading coil & antenna & seems to work ok .

Gary - G4WGT

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of James Moritz
Sent: 24 January 2004 00:40
To: rsgb_lf_group@blacksheep.org
Subject: LF: 137 kHz project......Handy cost-saving tip

Dear Dick, LF Group,

Thinking of cheap sources of ferrite, I have used the cores from old computer monitor line output transformers for some time for supression purposes - but the type of ferrite they are made from is very similar to the 3C8/3C85/3C90 grades often used on LF PA circuits.

Cheers, Jim Moritz

73 de M0BMU