Return-Path: Received: (qmail 25661 invoked from network); 15 May 2002 04:22:15 -0000 Content-Transfer-Encoding: 8bit X-Priority: 3 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 15 May 2002 04:22:15 -0000 X-MSMail-Priority: Normal Received: (qmail 26858 invoked from network); 15 May 2002 04:22:07 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 15 May 2002 04:22:07 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 177qCV-0002hZ-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 15 May 2002 05:15:43 +0100 Received: from astral.infomsk.ru ([212.164.44.2] helo=astral.omskcity.com) by post.thorcom.com with esmtp (Exim 3.33 #2) id 177qCU-0002hT-00 for rsgb_lf_group@blacksheep.org; Wed, 15 May 2002 05:15:42 +0100 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 LAA3ce1df2c231f for ; Wed, 15 May 2002 11:08:12 +0700 (OSS) Date: Wed, 15 May 2002 11:48:34 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Ground loss In-reply-to: <3.0.1.16.20020514104945.21f7a680@pb623250.kuleuven.be> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi, Rik. On Tue, 14 May 2002, Rik Strobbe wrote: > too large (eg. salt water) the counterpoise won't be of much use. On the > other side even for s = 0 (worst soil you can think of) R won't be endless > as the counterpoise will still work. I forgot to notice: When formula was derived a<<1 was assumed. This correspond to real conucting not dielectric ground. It's not very problem to avoid this limitation but now real situation seems more interesting. About too large S I'd say as folows. Are You sure conserpoise (ground rod) length won't be important for GROUND LOSS resistance in this case? May be it is not important for ALL loss resistance of antenna because coil resistance and radiation resistance (if antenna is large). About resistance dependance on frequency it seems then enviroment loss is frequency depending, not ground resistance itself. Unfortunely I can not estimate enviroment losses yet... 73 de RA9MB/Alex http://www.qsl.net/ra9mb