Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma02.r1000.mx.aol.com (Internet Inbound) with ESMTP id DA01B38000095; Fri, 16 Dec 2011 10:02:35 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RbYpJ-0004YF-RO for rs_out_1@blacksheep.org; Fri, 16 Dec 2011 14:31:57 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RbYpJ-0004Y6-Bt for rsgb_lf_group@blacksheep.org; Fri, 16 Dec 2011 14:31:57 +0000 Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RbYpI-0001oX-AV for rsgb_lf_group@blacksheep.org; Fri, 16 Dec 2011 14:31:57 +0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=jwCxN25UXNQ5DEKQUPr6VM6UGiA3yPHmilrjR7oictxo61B2aL6MgehGYhhCetYF; h=Message-ID:Date:From:Reply-To:To:Subject:Mime-Version:Content-Type:Content-Transfer-Encoding:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [209.86.224.62] (helo=wamui-bucket.atl.sa.earthlink.net) by elasmtp-kukur.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1RbYpA-000459-Ug; Fri, 16 Dec 2011 09:31:48 -0500 Received: from 97.117.191.47 by webmail.c.earthlink.net with HTTP; Fri, 16 Dec 2011 09:31:47 -0500 Message-ID: <5835333.1324045908555.JavaMail.root@wamui-bucket.atl.sa.earthlink.net> Date: Fri, 16 Dec 2011 09:31:48 -0500 (EST) From: Chris Trask To: rsgb_lf_group@blacksheep.org, rsgb_lf_group@blacksheep.org Mime-Version: 1.0 X-Mailer: EarthLink Zoo Mail 1.0 X-ELNK-Trace: b77fdb70683249914713efb067f9a722239a348a220c2609f418132b65dfccf39bd7c6145bafb408a8438e0f32a48e08350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 209.86.224.62 DomainKey-Status: good (testing) X-Spam-Score: 0.9 (/) X-Spam-Report: autolearn=disabled,DNS_FROM_RFC_WHOIS=0.879 Subject: RE: LF: RE: Wellbrook Loop Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 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-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:463611136:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d600a4eeb5d8b40c4 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none > > > You might want to add this to your list of suitable > > alternatives: > > > > http://www.home.earthlink.net/~christrask/Paper009.html > > >I didn't realise you were a member of this group. Thanks for > the link - I have been studying your other paper on > complementary push-pull amplifiers for active antennas but > hadn't seen your loop paper. > > Very helpful. > Clifton Labs used a portion of that paper in their latest active monopole amplifier offering. They added a bipolar emitter follower stage between the JFET input and complementary output to further unload the JFET. They also reverted back to the original KAA 1000 JFET input with far less current. It's a nice fusion of topologies and the performance is every bit as good. I have quite a few loop antenna papers on my page as well as a large work on shielded loop antennas in the files section of the Yahoo! loop antennas group. Chris