Return-Path: Received: from rly-db04.mx.aol.com (rly-db04.mail.aol.com [172.19.130.79]) by air-db03.mail.aol.com (v121_r4.4) with ESMTP id MAILINDB031-abd4939965f89; Fri, 05 Dec 2008 16:00:28 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-db04.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDB043-abd4939965f89; Fri, 05 Dec 2008 16:00:17 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1L8hm4-0006jd-Rw for rs_out_1@blacksheep.org; Fri, 05 Dec 2008 20:59:44 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1L8hm4-0006jU-2Q for rsgb_lf_group@blacksheep.org; Fri, 05 Dec 2008 20:59:44 +0000 Received: from vms046pub.verizon.net ([206.46.252.46]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1L8hm2-0004IK-Ug for rsgb_lf_group@blacksheep.org; Fri, 05 Dec 2008 20:59:43 +0000 Received: from [127.0.0.1] ([71.126.176.120]) by vms046.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0KBF005R78ZCCUJE@vms046.mailsrvcs.net> for rsgb_lf_group@blacksheep.org; Fri, 05 Dec 2008 14:59:36 -0600 (CST) Date: Fri, 05 Dec 2008 15:59:37 -0500 From: andre kesteloot In-reply-to: To: rsgb_lf_group@blacksheep.org Message-id: <49399639.5080800@verizon.net> MIME-version: 1.0 References: <49398AC0.60604@ukonline.co.uk> User-Agent: Thunderbird 2.0.0.18 (Windows/20081105) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: E field active antennas Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: QUOTED-PRINTABLE 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-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Andy Talbot wrote: > Hi Peter et group. Sounds an interesting antenna, but for full band > Rx coverage I can't see what a folded resistively loaded dipole has to > offer over the conventional short whip into a high impedance voltage > follower other than strong signal handling, which isn't an issue at > our new operational site. > > =20 Andy, you may want to look up http://www.arrl.org/tis/info/pdf/0109031.pdf which Frank Gentges K0BRA designed (with very minimal help from me :-) The design was published in QST (Sept 2001) and many were subsequently=20 made by Hams and others. Flat (within 1 db) from 15kHz to 30MHz If overload is not a problem at your location, then, as the article=20 suggest, you can use some other JFETS that then one we used in the=20 original design 73 Andr=E9 N4ICK