Return-Path: Received: (qmail 1327 invoked from network); 2 Sep 2002 12:37:42 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 2 Sep 2002 12:37:42 -0000 Received: (qmail 5191 invoked from network); 2 Sep 2002 12:38:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 2 Sep 2002 12:38:02 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 17lqSF-0003MN-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 02 Sep 2002 13:37:19 +0100 Received: from [165.212.11.2] (helo=cmsoutbound.mx.net) by post.thorcom.com with smtp (Exim 4.10) id 17lqSF-0003MD-00 for rsgb_lf_group@blacksheep.org; Mon, 02 Sep 2002 13:37:19 +0100 Received: from cmsapps01.cms.usa.net (HELO cmsoutbound.mx.net) (165.212.11.136) by cmsoutbound.mx.net with SMTP; 2 Sep 2002 12:36:49 -0000 Received: from usa.net [32.97.110.66] by cmsapps01.cms.usa.net (ASMTP/dibene@usa.net) via mtad (CM.1201.1.04A) with ESMTP id 087giBmli0416M36; Mon, 02 Sep 2002 12:37:11 GMT Message-ID: <3D735B69.1EC03538@usa.net> Date: Mon, 02 Sep 2002 14:36:57 +0200 From: "Alberto di Bene" X-Mailer: Mozilla 4.79 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000001c24c38$ea026420$f976073e@main> <002001c2513c$a9f3a5c0$4bdf7ad5@j1r9b7> <001f01c24bf7$599c0e40$4e6152d5@it> <003001c251f9$ed27a4a0$ad2465d5@oemcomputer> Subject: LF: Re: E-field antennas Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.7 required=5.0tests=DEAR_SOMEBODYversion=2.31 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Johan Bodin wrote: > Dear All, > > Giulio Scaroni wrote: > > > So i'm planning to made an Amrad antenna, i have send a request at > > Crystalonics for high current FET. > > Has anyone tried a small power MOSFET as input stage in an active > antenna? I am thinking of BS170, 2N7000 and similar transistors. I tried a VN10KM, a VMOS by Siliconix. When adequately biased (it is an enhancement MOS) it works, but, in my opinion, the intermodulation products, though low, could be a bit lower (but take note that as far as intermod is concerned, I am a difficult man to please..:-). I am waiting for the order of Giulio to Crystalonics to be fullfilled, so to build myself the AMRAD active whip. 73 Alberto I2PHD