Return-Path: <majordom@post.thorcom.com> Received: (qmail 4090 invoked from network); 23 Feb 2001 16:43:44 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 23 Feb 2001 16:43:44 -0000 Received: (qmail 12627 invoked from network); 23 Feb 2001 16:43:45 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Feb 2001 16:43:45 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14WLBV-00056T-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 23 Feb 2001 16:35:09 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from firewall.dii.unisi.it ([193.205.7.2] ident=postfix) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14WLBT-00056O-00 for rsgb_lf_group@blacksheep.org; Fri, 23 Feb 2001 16:35:08 +0000 Received: from alpha.dii.unisi.it (alpha.dii.unisi.it [10.1.0.1]) by firewall.dii.unisi.it (Postfix) with ESMTP id A4AC03C448 for <rsgb_lf_group@blacksheep.org>; Fri, 23 Feb 2001 17:32:57 +0100 (CET) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from mailsrv.dii.unisi.it (pcfasec.dii.unisi.it [10.6.9.1]) by alpha.dii.unisi.it (Postfix) with ESMTP id D7BCF1829C for <rsgb_lf_group@blacksheep.org>; Fri, 23 Feb 2001 18:45:57 +0100 (CET) Message-ID: <3A9691B5.5D36567D@mailsrv.dii.unisi.it> Date: Fri, 23 Feb 2001 17:37:09 +0100 From: "Valerio Gabbani" <valerio@dii.unisi.it> X-Mailer: Mozilla 4.61 [en] (X11; I; Linux 2.2.12-20 i586) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Antennas/ERP References: <7583.200102231227@gemini> Content-Type: text/plain; charset=iso-8859-2; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: <majordom@post.thorcom.com> James Moritz wrote: > ......There comes a point where the voltage on > an antenna becomes so high that breakdown occurs. Since for a > given antenna, the voltage is directly proportional to the current, > this places an upper limit on the ERP for a given antenna. > > I have just tried it increasing power to 2 kW . The results are two ceramic insulators perforated and two wire of a 4mm diameter iron cord melted. OK i can increase antenna insulation but I worry about what could happen if anyone touch the antenna wire when i'm transmitting at full power. '73, Valerio (IK5ZPV)