Return-Path: Received: (qmail 16559 invoked from network); 30 Jan 2002 09:07:13 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 30 Jan 2002 09:07:13 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 5575 invoked from network); 30 Jan 2002 09:07:15 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 30 Jan 2002 09:07:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16Vqbo-0004be-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 30 Jan 2002 09:00:48 +0000 Received: from mail2.cc.kuleuven.ac.be ([134.58.10.50]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16Vqbn-0004bX-00 for rsgb_lf_group@blacksheep.org; Wed, 30 Jan 2002 09:00:47 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail2.cc.kuleuven.ac.be (8.12.1/8.12.1) with SMTP id g0U8xROH091796 for ; Wed, 30 Jan 2002 09:59:27 +0100 Message-ID: <3.0.1.16.20020130095551.2ae77570@pb623250.kuleuven.be> X-Sender: pb623250@pb623250.kuleuven.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Wed, 30 Jan 2002 09:55:51 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Re: Please give us some signals In-reply-to: <3C55CFB5.1AA9C9B9@usa.net> References: 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: > I asked those guys what their computations would give for an EH antenna for >137 kHz... >The answer was that the diameter would have to be a bit less than one meter, >but the length around 17 meters .... this for a computed (by them) efficiency >of greater than 90 %... >I imagine what my neighbours would think of me should I erect such a monster in >my backyard... so, even if the EH antenna were a serious thing, that would not >be a viable solution for many. Hi Alberto, Ask these guys what would be the dimensions of a 1% efficiency EH antenna, maybe more convenient. I'm sure most of us could live with 1% efficiency, meaning that you get 1 Watt ERP with no more than 100W TX power. Apart from that I have serious doubts that a EH antenna works the way the inventors claim (combining separately generated E and H fields to a 'radiating' EH field). Maybe it no more than a very funny looking short and fat monopole. 73, Rik ON7YD