Return-Path: <owner-rsgb_lf_group@blacksheep.org> X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,SUBJ_RE_NUM autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tALL3Uqo013388 for <sq5bpf@lipkowski.org>; Sat, 21 Nov 2015 22:03:30 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a0FDN-0003nl-Em for rs_out_1@blacksheep.org; Sat, 21 Nov 2015 20:56:57 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a0FDN-0003nc-6O for rsgb_lf_group@blacksheep.org; Sat, 21 Nov 2015 20:56:57 +0000 Received: from smarthost01b.mail.zen.net.uk ([212.23.1.3]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from <chris@chriswilson.tv>) id 1a0FCJ-0008Cy-1A for rsgb_lf_group@blacksheep.org; Sat, 21 Nov 2015 20:56:56 +0000 Received: from [82.70.254.222] (helo=OfficeWin7.lan) by smarthost01b.mail.zen.net.uk with esmtp (Exim 4.80) (envelope-from <chris@chriswilson.tv>) id 1a0FC3-000CSP-9g for rsgb_lf_group@blacksheep.org; Sat, 21 Nov 2015 20:55:35 +0000 Date: Sat, 21 Nov 2015 20:55:34 +0000 From: Chris Wilson <chris@chriswilson.tv> Organization: Gatesgarth Developments X-Priority: 3 (Normal) Message-ID: <22063751.20151121205534@chriswilson.tv> To: DK7FC <rsgb_lf_group@blacksheep.org> In-Reply-To: <5650BCC4.2010404@posteo.de> References: <1981852865.20151017122027@chriswilson.tv> <1530BFEB-9BC2-4CA2-A7A3-338629A98202@me.com> <308511169.20151029202607@chriswilson.tv> <56328B1F.2080901@posteo.de> <299444874.20151120223657@chriswilson.tv> <5650BCC4.2010404@posteo.de> MIME-Version: 1.0 X-Originating-smarthost01b-IP: [82.70.254.222] X-Scan-Signature: b77892ad90d0261eaf071f4f6cf31464 Subject: Re[2]: LF: Automatic variometer circuit Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5242 Hello DK7FC, Saturday, November 21, 2015 I'll run it off a separate supply then, thanks Stefan, or maybe off an accumulator, I have loads of lightweight race car gel batteries that get changed solely on age, but are still fine for none critical purposes. Thanks for the reply! > Hi Chris, > I took a separate floating power supply to build this circuit, a simple > transformer (10VA), a bridge rectifier, electrolyt capacitors, voltage > regulators, you know, the traditional stuff :-) You could decouple the > ground of the phase meter to the coax screen by a large C. But i think > is is worth to build a separate power supply. I personally prefer to > spend a few parts more just to avoid eventual EMC problems at high power > levels, you know... > 73, Stefan -- Best regards, Chris 2E0ILY mailto:chris@chriswilson.tv