Return-Path: Received: from mtain-dc12.r1000.mx.aol.com (mtain-dc12.r1000.mx.aol.com [172.29.64.140]) by air-db10.mail.aol.com (v129.4) with ESMTP id MAILINDB104-869e4c9631ab38e; Sun, 19 Sep 2010 11:52:11 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dc12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1759838000D0D; Sun, 19 Sep 2010 11:52:09 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OxM9s-0001FN-Qz for rs_out_1@blacksheep.org; Sun, 19 Sep 2010 16:50:28 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OxM9i-0001FE-G1 for rsgb_lf_group@blacksheep.org; Sun, 19 Sep 2010 16:50:18 +0100 Received: from smtp.qtxt.dns-iol.com ([195.200.78.13]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OxM9g-0004oF-QW for rsgb_lf_group@blacksheep.org; Sun, 19 Sep 2010 16:50:19 +0100 Received: (qmail 367 invoked by uid 507); 19 Sep 2010 17:49:56 +0200 Received: from unknown (HELO ?192.168.1.101?) (john.rabson@numeo.fr@217.67.155.178) by smtp.qtxt.dns-iol.com with SMTP; 19 Sep 2010 17:49:56 +0200 From: John Rabson Mime-Version: 1.0 (Apple Message framework v1081) Date: Sun, 19 Sep 2010 17:56:12 +0200 In-Reply-To: <012701cb5808$dec312a0$0217aac0@desktop> To: rsgb_lf_group@blacksheep.org References: <011f01cb5807$eda94560$0217aac0@desktop> <012701cb5808$dec312a0$0217aac0@desktop> Message-Id: <183B7546-2DAF-40C2-8CAC-114FFFF53C58@numeo.fr> X-Mailer: Apple Mail (2.1081) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary=Apple-Mail-8--485588864 Subject: Re: LF: RE: G7NKS on QRSS 137.7 and also disaster recvoery X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_70_80, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE 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-global-disposition: G x-aol-sid: 3039ac1d408c4c9631a90e73 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --Apple-Mail-8--485588864 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Jim, What is the waveform of the current drawn from the PSU? In my experience= some designs of stabiliser don't like large fast variations in load. 73 John F5VLF On 19 Sep 2010, at 16:42CEST, James Cowburn wrote: > It appears I spoke too soon! Two more pa transistors and a cap all= charred! Sorry Chris!! > =20 > It seems the supposedly regulated PSU wasn=92t and the excursion from 24= v to 30v was too much > =20 > QRT on 137 then > =20 > Best 73s and see you on 500 wspr > =20 > Jim --Apple-Mail-8--485588864 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Jim,

What is the waveform of the current drawn fr= om the PSU?  In my experience some designs of stabiliser don't like= large fast variations in load.

73
John= F5VLF

On 19 Sep 2010, at 16:42CEST, James Cowburn= wrote:

It appears I spoke too soon!     Two more= pa transistors and a cap all charred!   Sorry Chris!!
 
It seems the supposedly regulated PSU wasn=92t and the excursi= on from 24v to 30v was too much
 <= /div>
QRT on 137 then<= o:p>
<= span lang=3D"EN-GB" style=3D"font-size: 10pt; font-family: Arial; color:= navy; "> 
Best 73s and see you on 500 wspr=
&nb= sp;
<= span lang=3D"EN-GB" style=3D"font-size: 10pt; font-family: Arial; color:= navy; ">Jim

=3D --Apple-Mail-8--485588864--