Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: INFN-TO: mailn 1233; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v7UFpOR0004550 for ; Wed, 30 Aug 2017 17:51:26 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dn5B4-0002eU-4H for rs_out_1@blacksheep.org; Wed, 30 Aug 2017 16:45:14 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dn5B3-0002eL-D7 for rsgb_lf_group@blacksheep.org; Wed, 30 Aug 2017 16:45:13 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dn5Az-0002hR-QM for rsgb_lf_group@blacksheep.org; Wed, 30 Aug 2017 16:45:12 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id C12CA20915 for ; Wed, 30 Aug 2017 17:45:05 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3xj8w11z2tz104v for ; Wed, 30 Aug 2017 17:45:05 +0200 (CEST) Message-ID: <59A6DD80.2070605@posteo.de> Date: Wed, 30 Aug 2017 17:45:04 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <15e1991abae-c08-d02c@webjas-vac137.srv.aolmail.net> <59A066BA.7060608@posteo.de> <99e04e4a-b978-829d-dabe-1bd1551f9a19@abelian.org> <22e7826e-60f1-9170-397e-494ad2cab3bd@abelian.org> <59A6A25C.9090305@posteo.de> <385C9CB0F9B441D997EE83C8DBCC2986@gnat> <59A6B3D5.7000408@posteo.de> In-Reply-To: <59A6B3D5.7000408@posteo.de> X-Scan-Signature: 4ad5f3f1a9241b934aaa5d0e23c9dc57 Subject: ULF: transformer components Content-Type: text/plain; charset=UTF-8; format=flowed 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 2.75 Status: O X-Status: X-Keywords: X-UID: 12484 Hi ULF, I've ordered some components to build a mains transformer (actually just a coil) for further 970 Hz experiments. It has an EI core, to allow adding an air gap to align the inductivity! http://www.iup.uni-heidelberg.de/schaefer_vlf/EI%20transformer%20components.jpg It is very nice, the quality is very good and it is not so expensive. Worth to play with. The idea is to build a few identical coils for 970 Hz (magnetically isolated to each other) which allow to run more voltage and antenna current down on 970 Hz... 73, Stefan