Return-Path: Received: (qmail 9783 invoked from network); 15 Nov 2002 16:18:01 -0000 Content-Transfer-Encoding: 8bit Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 15 Nov 2002 16:18:01 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 17513 invoked from network); 15 Nov 2002 13:26:18 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 15 Nov 2002 13:26:17 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18CgTW-0006KC-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 15 Nov 2002 13:25:34 +0000 Received: from [212.164.44.2] (helo=astral.omskcity.com) by post.thorcom.com with esmtp (Exim 4.10) id 18CgTV-0006Jv-00 for rsgb_lf_group@blacksheep.org; Fri, 15 Nov 2002 13:25:33 +0000 Received: from fitec.omskcity.com (mu06.dialup2.infomsk.ru [212.164.44.118]) by astral.omskcity.com (8.9.3/8.9.3) with SMTP id TAA3dd4f4d54cab for ; Fri, 15 Nov 2002 19:21:25 +0600 (OS) Date: Fri, 15 Nov 2002 19:21:14 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org In-reply-to: <001501c28c9b$eda10ed0$0700000a@parissn2> Message-ID: MIME-Version: 1.0 Subject: Re: LF: Re: Calibrating LF Current Meters Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Status: No, hits=-1.6 required=5.0tests=DATE_IN_FUTURE_03_06,EMAIL_ATTRIBUTION,IN_REP_TO, QUOTED_EMAIL_TEXT,SPAM_PHRASE_02_03,USER_AGENT_PINEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Hi, Group. On Fri, 15 Nov 2002, Stewart Nelson wrote: > 3. Put a suitable light bulb in series. Measure the brightness > with a light meter, then see how much DC or mains frequency > current it takes to produce the same brightness. More easy way: take two identical light bulb one in RF another in DC simultaniously. And You do not need light meter, You can see directly when brightness is the same. But this is right only if skin effect in bulb filament is not strong (pentation depth is much grater then filament diameter). On 136 kHz it should be OK. 73 de RA9MB/Alex http://www.qsl.net/ra9mb