Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, PLING_QUERY,RATWARE_GECKO_BUILD,SPF_PASS 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 u4G93uMM032665 for ; Mon, 16 May 2016 11:03:56 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1b2EKK-0002Cq-RA for rs_out_1@blacksheep.org; Mon, 16 May 2016 09:56:36 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1b2EKK-0002Ch-Hl for rsgb_lf_group@blacksheep.org; Mon, 16 May 2016 09:56:36 +0100 Received: from smtp-out01.xworks.net ([31.25.48.13]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1b2EKJ-0002wH-0g for rsgb_lf_group@blacksheep.org; Mon, 16 May 2016 09:56:35 +0100 Received: from mailbackend2 (cluster06.xworks.net [10.100.1.80]) by smtp-out01.xworks.net (Postfix) with ESMTP id 76696615FB for ; Mon, 16 May 2016 10:56:34 +0200 (CEST) X-DKIM-Result: Domain=kabelmail.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kabelmail.de; s=mail; t=1463388994; bh=vm+kkdVf1Hj02nBc85ELkPwmTfAxR2k99z2mkI6Rl0U=; h=Subject:To:References:From:Date:MIME-Version:In-Reply-To: Content-Type; b=sh6FtyUUSlyeIJuI+NwliTpM0aevEGd6THV6FgoPpZBZErz6BJxvG2wtkm4+NPkBU 8PvM8FfQ1w5J2P3PvmJqcPWrwIurwPXRC9lO7ns9DGF7NO3AciNCQ6HXA+vuCcOaCI U/kOtvtxOSkqbA60g02LF0HGGFjoDjaemI3re/Zc= Received: from [192.168.178.33] (ipbcc1500e.dynamic.kabel-deutschland.de [188.193.80.14]) (authenticated bits=0) by smtpa.mediabeam.com with ESMTP id u4G8uVhh002989 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 16 May 2016 10:56:32 +0200 X-mediaBEAM-Originating-IP: [188.193.80.14] X-mediaBEAM-AUTHID: [DK1IS@kabelmail.de] To: rsgb_lf_group@blacksheep.org References: <5737138D.4050807@posteo.de> <245E116B-93B7-4A7D-AD24-FA4B8A8898BA@hurontel.on.ca> <1771641848.20160514171621@chriswilson.tv> <57385CB1.2060207@posteo.de> <0b4fc498-0a8a-3c68-bc32-f2ae87c03315@freenet.de> From: DK1IS Message-ID: <41c714b5-bac6-d9ef-6430-49e9ff2f3212@kabelmail.de> Date: Mon, 16 May 2016 10:56:49 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.0 MIME-Version: 1.0 In-Reply-To: <0b4fc498-0a8a-3c68-bc32-f2ae87c03315@freenet.de> X-mediaBEAM-AuthCheck: route13 X-mediaBEAM-AuthScore: 1.9/5.0, scanned in 0.968sec X-MIME-Autoconverted: from 8bit to quoted-printable by smtpa.mediabeam.com id u4G8uVhh002989 X-Scan-Signature: 4ead635eadbaebfaa92cfec77deb715d Subject: Re: LF: A transductor instead of a traditional variometer on VLF/LF/MF? Done! Content-Type: text/plain; charset=utf-8; format=flowed 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 10.1.3.11 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by paranoid.lipkowski.org id u4G93uMM032665 Status: O X-Status: X-Keywords: X-UID: 8087 Hi Wolf, Am 15.05.2016 um 14:12 schrieb Wolfgang Büscher: > Interesting application .. but wouldn't the operation of such a simple > transductor (wound on a single ferrite core) depend a lot on the 'RF > drive' itself, and / or have different influence on the positive and > negative half wave ? > Transductors for mains frequencies (as used in Theaters for electric > lighting, long before the semiconductor age) used a balanced > configuration, so the satturation appeared symmetric for both half > waves. I think the Alexanderson alternator at Grimeton uses a similar > principle for the modulator (keying). > So for a high-power application, one would possibly need two ferrite > rings, RF coils "anti-parallel" (with opposite DC magnetisation). So did Stefan by using an 8-formed winding for the DC excitation! 73, Tom, DK1IS