Return-Path: Received: from mtain-mj07.r1000.mx.aol.com (mtain-mj07.r1000.mail.aol.com [172.21.164.91]) by air-da05.mail.aol.com (v127_r1.1) with ESMTP id MAILINDA052-86154b841be052; Tue, 23 Feb 2010 13:18:08 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mj07.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7F9EC380000E6; Tue, 23 Feb 2010 13:18:04 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NjzJL-0003Gx-Qv for rs_out_1@blacksheep.org; Tue, 23 Feb 2010 18:16:43 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NjzJL-0003Go-Ec for rsgb_lf_group@blacksheep.org; Tue, 23 Feb 2010 18:16:43 +0000 Received: from lnx500.hrz.tu-darmstadt.de ([130.83.156.225]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NjzJJ-0006D3-Nu for rsgb_lf_group@blacksheep.org; Tue, 23 Feb 2010 18:16:43 +0000 Received: from FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de (File-Server-HST.hst.e-technik.tu-darmstadt.de [130.83.212.129]) by lnx500.hrz.tu-darmstadt.de (8.14.2/8.14.2/HRZ/PMX) with SMTP id o1NIGdMx020995 for ; Tue, 23 Feb 2010 19:16:39 +0100 (envelope-from schaefer@hst.tu-darmstadt.de) Received: from [127.0.0.1] (helo=File-Server-HST.hst.e-technik.tu-darmstadt.de) by FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de with AVK MailGateway; for ; Tue, 23 Feb 2010 19:16:40 +0100 Content-class: urn:content-classes:message MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Tue, 23 Feb 2010 19:16:40 +0100 Message-ID: <38A51B74B884D74083D7950AD0DD85E82A1B13@File-Server-HST.hst.e-technik.tu-darmstadt.de> X-MS-Has-Attach: X-MS-TNEF-Correlator: <38A51B74B884D74083D7950AD0DD85E82A1B13@File-Server-HST.hst.e-technik.tu-darmstadt.de> Thread-Topic: LF: VLF_8.79 kHz_grounding systems Thread-Index: Acq0qTctyiDPwOwlT7mm4wzAcDzdxgACOKRW References: From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= To: X-AVK-Virus-Check: AVB 19.717;31.01.2010 X-PMX-TU: seen v0.99a by 5.5.9.388399, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.2.23.180632 X-PMX-SPAMCHECK: outgoing mail X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01CAB4B4.5854EAA2" Subject: AW: LF: VLF_8.79 kHz_grounding systems X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 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-aol-global-disposition: G X-AOL-VSS-INFO: 5400.1158/55413 X-AOL-VSS-CODE: clean x-aol-sid: 3039400c89ae4b841bdc7a7b X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) ------_=_NextPart_001_01CAB4B4.5854EAA2 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable >Ground resistance is not worth in such a conditions. Coil (or >high voltage transformer) resistance is much grater anyway. =20 So, the coil losses decrease with it's L (assuming a given wire diameter,= coil diameter and spacing and so on) and thus it is good to decrease the= needed L. So we have to spend a high coupling capacity to ground (at the= end of Pete's inv-L) and thus it may be useful to spend a high metallic= area to ground which can easily be done by such a foil ;-) =20 BTW, i do not think that the resistive losses at the "ground coupling end"= of the inv-L would be reduced by lifting the foil some cm/inches above gr= ound. The E-field lines in this capacitor model (foil-soil) will have to= pass the same way.=20 =20 Stefan/DK7FC ------_=_NextPart_001_01CAB4B4.5854EAA2 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: base64 eJ8+IikSAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEgAEAJwAAAEFXOiBMRjogVkxGXzguNzkg a0h6X2dyb3VuZGluZyBzeXN0ZW1zAKwMAQWAAwAOAAAA2gcCABcAEwAQACgAAgBHAQEggAMADgAA ANoHAgAXABMAEAAoAAIARwEBCYABACEAAAAxOTQ5RTVFMTNENUYzQjQ3Qjg0OTU3MEM5MTQ0QzhF MgAjBwEDkAYA3AwAADgAAAADADYAAAAAAEAAOQCi6lRYtLTKAR4APQABAAAABQAAAEFXOiAAAAAA AgFHAAEAAAAyAAAAYz1ERTthPSA7cD1IU1Q7bD1GSUxFLVNFUlZFUi1ILTEwMDIyMzE4MTY0MFot MTAyOQAAAB4ASQABAAAAJwAAAFJlOiBMRjogVkxGXzguNzkga0h6X2dyb3VuZGluZyBzeXN0ZW1z AABAAE4AAFfMzOO0ygEeAFoAAQAAACMAAABvd25lci1yc2diX2xmX2dyb3VwQGJsYWNrc2hlZXAu b3JnAAACAVsAAQAAAGMAAAAAAAAAgSsfpL6jEBmdbgDdAQ9UAgAAAABvd25lci1yc2diX2xmX2dy b3VwQGJsYWNrc2hlZXAub3JnAFNNVFAAb3duZXItcnNnYl9sZl9ncm91cEBibGFja3NoZWVwLm9y ZwAAAgFcAAEAAAAoAAAAU01UUDpPV05FUi1SU0dCX0xGX0dST1VQQEJMQUNLU0hFRVAuT1JHAB4A XQABAAAAFAAAAEFsZXhhbmRlciBTLiBZdXJrb3YAAgFeAAEAAABEAAAAAAAAAIErH6S+oxAZnW4A 3QEPVAIAAAAAQWxleGFuZGVyIFMuIFl1cmtvdgBTTVRQAGZpdGVjQG9tc2tjaXR5LmNvbQACAV8A AQAAABgAAABTTVRQOkZJVEVDQE9NU0tDSVRZLkNPTQAeAGYAAQAAAAUAAABTTVRQAAAAAB4AZwAB AAAAIwAAAG93bmVyLXJzZ2JfbGZfZ3JvdXBAYmxhY2tzaGVlcC5vcmcAAB4AaAABAAAABQAAAFNN VFAAAAAAHgBpAAEAAAATAAAAZml0ZWNAb21za2NpdHkuY29tAAAeAHAAAQAAACMAAABMRjogVkxG XzguNzkga0h6X2dyb3VuZGluZyBzeXN0ZW1zAAACAXEAAQAAABsAAAAByrSpNy3KIM/A7CVPuabj DMBwPN3GAAI4pFYAHgB0AAEAAAAdAAAAcnNnYl9sZl9ncm91cEBibGFja3NoZWVwLm9yZwAAAAAe ABoMAQAAAA8AAABTdGVmYW4gU2No5GZlcgAAHgAdDgEAAAAjAAAATEY6IFZMRl84Ljc5IGtIel9n cm91bmRpbmcgc3lzdGVtcwAAAgEJEAEAAABLBQAARwUAAA4OAABMWkZ13V/s8AMACgByY3BnMTI1 gjIDQ2h0bWwxAzA/AQMB9wqAAqQD4wIAY2jBCsBzZXQwIAcTAoD/EAMAUARWCFUHshHVDlEDAd0Q 1zIGAAbDEdUzBEYQ2dkS72Y0A8YRijUDxgdtbwKAEeMI7wn3OxwPDjA17x0vHQER4QxgYwBQCwkB ZEwzNhFgC6U0IBACKg5cDrIBkA4QOSA8SABUTUwgZGlyPfEioHI+fSJjACEDMCOxnGRvAOAjsQqx XHEb8L8jsRDwAzAkFRFgIhszIfAxIxBFQUQj4CIcNzfBIwBUSVRMRSgNIeCBDvBSZTogTEYq4EJW KwBfOC43IvBrWEh6XwnACGBuI3BuAGcgc3lzdGVt0nMoHTg1IwAvKU8isl0K4yAuzy/fDhA2DvA8 gE1FVEEgbmEHgAA9R0VORVJBVDhPUiAFoAIwCfB0PY4iBeAjIyuAMDAuIVCYMDEuLgAOMDkiKA2/ KpEuQCfPKmExDyKxNRFg4DxCT0RZKA0hYTh/iGc5NiMARElWI2YQIGlkPT1QT1dBQyrAC1B5VGV4 FOA5+Dc1NyPpAAAlFSWzJXH/Jg86nzuvPLc+vz/PQNMiOZw2NERKQJ8ilDQ4IwAwRk9OVDPBG6E9 I2c08EqiLKBpejMQFPBm7wDQMxAHE0Q7YxPwA7IB0C8DMSHwSC8ihDgh8CZndnQCgCQHPk3fST5L gyJfB201wURZGYBNyUcsIyB/HpAAkCzQAHBLoD1ABCBu+m8FQHcbsSXwC4AsoB/wTSXwYTPCQ8B0 aQIgc/YuFxEDESgFsCIcMkA5sfZSI+sLgGUKgVB/Tv9QDuhoaWcl8HYG8CKxVnCXI8AAcQIQcgeA cilV3XZtV6IJwGEs4AXAAHB5UHdheS4iHDU8YS//SeIj6SP3UO5jb2R8IjkBwF8j9wqiZKgKgCIc MCeRL/88kWbPZQ9rT2xfQU9CX0NvH0R/RY9Gn0evXD8mbmLEc3BdeVwnYQFAdP//aK9pv22Pbp93 T3C/cc9y349z73n/dg9/F1NvLF+Q/mhWcAWgAxEboAQQB5EFgT0ekGERMFbwWEBXQXQn2wQgI1Ao iNBXkG0sclfg+GdpdgnwiQEekIIxMvH/YdGHYIfDi0ZiAVXAeNAA0POKM4zSbyACIGBQjMJXMM51 BCBYQFaCZ28EcF+Q/43QiIeHgltgCYAJgCrwWKD/h0BW8FZwEQCKsI9ieNAJ8G9VwFfgXtMFoHUL UCxyY/JhjRJ0eY9iLBSJwQVA64eCkhJvJHBQi4GJgQuAuHYtTI4cAMCTwGJWcPuOkAEQdQMgkc6L cQdAW0DuY1fQiLGT2Xde0CXhk1D/A6CIwQMQlzMk0Ftgl0CTwMdXlQIQAxE7LSl6j3uf/3yvfb9+ z3/fgO+B/4MPhB//hS+GP3eveL95z51/no+fn/+gr6lfos+j36Tvpf+nD6gf0akqQlRXh2Bpm6FW s/tXMAuAa4dxlJVV5IqhiAbdlJUilBWSx5IRIpUyh4L/leNW8ZfAVcCXUR6RH/CQsf+cAVtAAYAs coeCnKONwAeA+TPAbS8LgBDwvDIG4JGRiywUWKBUh5FFLWYIkP+/MVtClcK6UgQgk1UFsQRi+1jx nKItjcADEGBQA/CZMO+RZwqwBBGHgnMy8VbwYlH/rL+tz67fr++w/7IPsx+0L/+1P7ZPt1+4b6nf qu+r/8jP/8nfyu/L/9Svzh/PL9A/0U9f0l/Tb4Z8LOBLgG7boEv4N0ZD2C/ZP9pP21/cb/s4+Umx LznfKmEpETcAIzEFI+B97dAAHgA1EAEAAABXAAAAPDM4QTUxQjc0Qjg4NEQ3NDA4M0Q3OTUwQUQw REQ4NUU4MkExQjEzQEZpbGUtU2VydmVyLUhTVC5oc3QuZS10ZWNobmlrLnR1LWRhcm1zdGFkdC5k ZT4AAB4AORABAAAAQgAAADxQaW5lLkxOWC4zLjk1LjExMDAyMjMyMzUwMDIuMjg3QS0xMDAwMDBA bm9uYW1lLm5vZG9tYWluLm5vd2hlcmU+AAAAHgBHEAEAAAAPAAAAbWVzc2FnZS9yZmM4MjIAAAsA 8hABAAAAHwDzEAEAAABeAAAAQQBXACUAMwBBACAATABGACUAMwBBACAAVgBMAEYAXwA4AC4ANwA5 ACAAawBIAHoAXwBnAHIAbwB1AG4AZABpAG4AZwAgAHMAeQBzAHQAZQBtAHMALgBFAE0ATAAAAAAA CwD2EAAAAABAAAcwIgW+GbK0ygFAAAgwVK9ZWLS0ygEDAN4/r28AAAMA8T8HBAAAHgD4PwEAAAAP AAAAU3RlZmFuIFNjaORmZXIAAAIB+T8BAAAAXAAAAAAAAADcp0DIwEIQGrS5CAArL+GCAQAAAAAA AAAvTz1IU1QvT1U9RVJTVEUgQURNSU5JU1RSQVRJVkUgR1JVUFBFL0NOPVJFQ0lQSUVOVFMvQ049 U0NIQUVGRVIAHgD6PwEAAAAVAAAAU3lzdGVtIEFkbWluaXN0cmF0b3IAAAAAAgH7PwEAAAAeAAAA AAAAANynQMjAQhAatLkIACsv4YIBAAAAAAAAAC4AAAADAP0/5AQAAAMAGUAAAAAAAwAaQAAAAAAD AB1AAAAAAAMAHkAAAAAAHgAwQAEAAAAJAAAAU0NIQUVGRVIAAAAAHgAxQAEAAAAJAAAAU0NIQUVG RVIAAAAAHgAyQAEAAAAjAAAAb3duZXItcnNnYl9sZl9ncm91cEBibGFja3NoZWVwLm9yZwAAHgAz QAEAAAATAAAAZml0ZWNAb21za2NpdHkuY29tAAAeADhAAQAAAAkAAABTQ0hBRUZFUgAAAAAeADlA AQAAAAIAAAAuAAAAAwB2QP////8LACkAAAAAAAsAIwAAAAAAAwAGEDkBXfADAAcQSQIAAAMAEBAB AAAAAwAREAAAAAAeAAgQAQAAAGUAAABHUk9VTkRSRVNJU1RBTkNFSVNOT1RXT1JUSElOU1VDSEFD T05ESVRJT05TQ09JTChPUkhJR0hWT0xUQUdFVFJBTlNGT1JNRVIpUkVTSVNUQU5DRUlTTVVDSEdS QVRFUkFOWVdBAAAAAAIBfwABAAAAVwAAADwzOEE1MUI3NEI4ODRENzQwODNENzk1MEFEMEREODVF ODJBMUIxM0BGaWxlLVNlcnZlci1IU1QuaHN0LmUtdGVjaG5pay50dS1kYXJtc3RhZHQuZGU+AAAG 1g== ------_=_NextPart_001_01CAB4B4.5854EAA2--