Return-Path: Received: (qmail 62867 invoked from network); 31 Jan 2004 12:16:21 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore01.plus.net with SMTP; 31 Jan 2004 12:16:21 -0000 Received: (qmail 19383 invoked from network); 31 Jan 2004 12:16:20 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Priority: 3 X-MSMail-Priority: Normal X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 31 Jan 2004 12:16:19 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1Amu2t-0004vE-Iv for dave@picks.force9.co.uk; Sat, 31 Jan 2004 12:16:19 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Amu2I-0005Zm-Ua for rs_out@blacksheep.org; Sat, 31 Jan 2004 12:15:42 +0000 Received: from [64.12.136.163] (helo=imo-m08.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1Amu2I-0005Za-8L for rsgb_lf_group@blacksheep.org; Sat, 31 Jan 2004 12:15:42 +0000 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m08.mx.aol.com (mail_out_v36_r4.12.) id l.f6.360ff7d1 (26116) for ; Sat, 31 Jan 2004 07:15:07 -0500 (EST) From: G0MRF@aol.com Message-ID: Date: Sat, 31 Jan 2004 07:15:07 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 Subject: Re: LF: My G0MRF 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=0.7 required=5.0 tests=HTML_MESSAGE,HTML_TAG_BALANCE_HTML,NO_REAL_NAME 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 In a message dated 1/31/04 12:04:33 PM GMT Standard Time, dj9dw@t-online.de writes:

Hi group,
some might remember my flee for help, as I had bad ringing on T2, high
current and low output. Now I figured, that there was an overlapping in
switchtime. SPSUs use to have abt 48%  dutycycle on each half. I had over
50% on-time on the FETs. By cutting off the schottkys, I managed to get that
thing running. Not yet measured ultimate power, but at 200W in I get
somewhat over 160W out.
What did that teach me? Never trust nobody, not even a schematic, hi.

Thanks to those who tried to help and 73 to all of you, Peter, dj9dw.






Self training of the licensee......as it says in the licence.

Well done Peter.

David