Return-Path: Received: from rly-ma03.mx.aol.com (rly-ma03.mail.aol.com [172.20.116.47]) by air-ma06.mail.aol.com (v126.13) with ESMTP id MAILINMA062-89b4b0c3cd270; Tue, 24 Nov 2009 15:07:02 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma03.mx.aol.com (v125.7) with ESMTP id MAILRELAYINMA035-89b4b0c3cd270; Tue, 24 Nov 2009 15:06:44 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ND1e2-00077q-Hq for rs_out_1@blacksheep.org; Tue, 24 Nov 2009 20:05:50 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ND1e2-00077f-5R for rsgb_lf_group@blacksheep.org; Tue, 24 Nov 2009 20:05:50 +0000 Received: from mail-fx0-f215.google.com ([209.85.220.215]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1ND1e1-0003h1-I5 for rsgb_lf_group@blacksheep.org; Tue, 24 Nov 2009 20:05:50 +0000 Received: by fxm7 with SMTP id 7so7277829fxm.29 for ; Tue, 24 Nov 2009 12:05:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=lzM7tvGrgMqoDcUQWmug+iO528mqgyJIs5app0MZBac=; b=vMPfpOEQTZyvKMsDLBH/9YHnj+wh5FtjFRYvd9IY9IWOcGqz6RJonxYkPUoIT1glxV R77TnWHF+wDWVv7raTjiqf9b0oTv/XzPMKWtioznIDF5xDNYiuZUHHLZo1Yu6rlxerHX zR9s0hchWJ8w0dAAzYsSxcNyjakiCrogWY0nI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=bAvshwdr9LnwdxGDAFSbCZD4xpRLKpo6Z+04+ChnE3FdKbpUsOjZ2tyfPIbte1amSb X9UVn1EUbYoHcDSrsAZxwNiP7tlT87Es6+IzHTkT216HXtnWqQg7Alk6KKLCRYxvzpct uplbpQhArxRCqaFm/ZmnSSOhR0mDLv1PZDjWo= MIME-Version: 1.0 Received: by 10.239.139.211 with SMTP id u19mr707608hbu.97.1259093142895; Tue, 24 Nov 2009 12:05:42 -0800 (PST) In-Reply-To: References: <9afca2640911241140j230515e9kcbcaffd3911ccb82@mail.gmail.com> Date: Tue, 24 Nov 2009 20:05:42 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: IRF510 500kHz PA stability issues - advice please Content-Type: text/plain; charset=ISO-8859-1 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-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d231.1 ; domain : googlemail.com DKIM : pass X-Mailer: Unknown (No Version) Correction:- The IRF540 is also 100V rated, but a lot lower Rds on 0.05 ohms rather than 0.5 ohms for the IRF510. That may well contribute to overheating and damage on mismatch. > open and short circuits and seemed very robust; but I did use the > meatier and more robust higher voltage IRF540. Doesn't the IRF510 only > have a 100V rating? > > Andy > www.g4jnt.com > > This email has been scanned for damaging side-effects by the health > and safety police >