Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id vARJVQ8l022099 for ; Mon, 27 Nov 2017 20:31:28 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eJP3H-0004eH-R3 for rs_out_1@blacksheep.org; Mon, 27 Nov 2017 19:26:47 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eJP3H-0004e8-D4 for rsgb_lf_group@blacksheep.org; Mon, 27 Nov 2017 19:26:47 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eJP3E-0004I3-Nf for rsgb_lf_group@blacksheep.org; Mon, 27 Nov 2017 19:26:46 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Sl7EiAzmufL5MKonRP7/w4UAMNa4X99Bd7xlQsBsX2o=; b=B/mkMchmrKZjFJxReCZvgSsj4L Ss4SHjcJBwAKFedC67ZTS4lbLgGpfhVrmFDOA6V94LXjxR3rDP2/5F3u+v0MejaUMIr61/SHFE+iw +SOep7xSiTgcYhTtkJhycZ3wDrGcnQSYcm1Cx4s+eOEaxg2chAE1yXey1oLDBWwljhGo=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:45334 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eJP3E-0002dB-Dv for rsgb_lf_group@blacksheep.org; Mon, 27 Nov 2017 19:26:44 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id D215E4008FC for ; Mon, 27 Nov 2017 19:26:43 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org> <00f901d36646$feda4e60$fc8eeb20$@comcast.net> From: Paul Nicholson Message-ID: <085dd850-9c10-16a0-70ef-fb2de079ffb8@abelian.org> Date: Mon, 27 Nov 2017 19:26:43 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <00f901d36646$feda4e60$fc8eeb20$@comcast.net> Content-Language: en-US X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Jim wrote: > Considerably reducing DC-DC converter output filter > capacitance and/or load current can almost always solve > the problem of erratic power supply startup related to > high source resistance, [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 5c1f37c04fc013ebbc2288fd3791d043 Subject: Re: LF: RE: Todmorden receiver Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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 Jim wrote: > Considerably reducing DC-DC converter output filter > capacitance and/or load current can almost always solve > the problem of erratic power supply startup related to > high source resistance, When I checked the data sheet for the IP1215S isolating DC-DC converter I spotted that it said max 47uF load capacitance - and I had 100uF hanging on each rail. Hopefully that's the answer. For some reason I can't reproduce the start-up problem in the office even though I've got slightly higher cable resistance. I like these XP power IP series converters, good isolation and they have a large input voltage range. -- Paul Nicholson --