Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6D3783800008B; Fri, 4 Nov 2011 14:11:25 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RMODw-0000W1-EK for rs_out_1@blacksheep.org; Fri, 04 Nov 2011 18:10:40 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RMODw-0000Vs-3b for rsgb_lf_group@blacksheep.org; Fri, 04 Nov 2011 18:10:40 +0000 Received: from smtp-vbr16.xs4all.nl ([194.109.24.36]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RMODu-0004xh-FQ for rsgb_lf_group@blacksheep.org; Fri, 04 Nov 2011 18:10:40 +0000 Received: from pc-roelof (ndb.demon.nl [82.161.81.65]) by smtp-vbr16.xs4all.nl (8.13.8/8.13.8) with ESMTP id pA4IAbOb060049 for ; Fri, 4 Nov 2011 19:10:37 +0100 (CET) (envelope-from roelof@ndb.demon.nl) To: rsgb_lf_group@blacksheep.org References: <6960E96D-E826-4AD3-A1FF-585BFBEC86A6@numeo.fr> Date: Fri, 04 Nov 2011 19:10:31 +0100 MIME-Version: 1.0 From: "Roelof Bakker" Message-ID: In-Reply-To: <6960E96D-E826-4AD3-A1FF-585BFBEC86A6@numeo.fr> User-Agent: Opera Mail/11.52 (Win32) X-Virus-Scanned: by XS4ALL Virus Scanner X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes Subject: Re: LF: PA0RDT whip 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: 0:2:397220224:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1db4074eb42acc45be X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello John, A Schottky diode was used to minimize the voltage drop. However this is not an important issue. On an other note, instead of the trusty 2N5109 a BFQ19, a modern rf transistor, can be used. It gives slightly better IMD figures in this circuit, especial at lower supply voltages. 73, Roelof, pa0rdt