Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; 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+deb8u1) with ESMTP id uBSL3Bhf029765 for ; Wed, 28 Dec 2016 22:03:12 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cMLK1-0000iV-Qd for rs_out_1@blacksheep.org; Wed, 28 Dec 2016 20:59:41 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cMLK1-0000iM-AG for rsgb_lf_group@blacksheep.org; Wed, 28 Dec 2016 20:59:41 +0000 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cMLJy-0005Gx-Dd for rsgb_lf_group@blacksheep.org; Wed, 28 Dec 2016 20:59:40 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 51D5A20E5E for ; Wed, 28 Dec 2016 21:59:37 +0100 (CET) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3tplV06f0DzyrH for ; Wed, 28 Dec 2016 21:59:36 +0100 (CET) Message-ID: <586427B8.9060907@posteo.de> Date: Wed, 28 Dec 2016 21:59:36 +0100 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: <159377c5fb0-275f-1de09@webprd-m63.mail.aol.com> In-Reply-To: X-Scan-Signature: 4ead635eadbaebfaa92cfec77deb715d Subject: Re: VLF: New coil for 8270 Hz Content-Type: text/plain; charset=ISO-8859-15; 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: 9982 Am 28.12.2016 19:00, schrieb jcraig@mun.ca: > PS Stefan's coil is very compact. 0,4 mm wire? Hope it can take the kV! Hi Joe, Yes, 0.4mm wire. The voltage is not the problem for the wire. But the tube is out of PVC and the length of the winding is about 0.3m. So it will be about 1kV/cm which could be problematic if the inner side of the tube becomes wet, inhomogeneous wet. This could cause strong local E field strength which leads to arcing on the surface. Arcing on the surface makes the surface conductive, a self accelerating process that can be repaired. This is the high risk of this construction! It has its advantages and disadvantages. It will handle 700 mA RF current, at least now in winter :-) But i should take care to keep it as dry as possible. We will see what happens. 73, Stefan