X-GM-THRID: 1200536038900871949 X-Gmail-Labels: rsgb lf X-Gmail-Received: c39c2f66e982bd2019cca2102a702648046defc1 Delivered-To: daveyxm@gmail.com Received: by 10.54.70.6 with SMTP id s6cs32281wra; Thu, 13 Apr 2006 03:18:59 -0700 (PDT) Received: by 10.66.223.20 with SMTP id v20mr165592ugg; Thu, 13 Apr 2006 03:18:59 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id j1si610777ugf.2006.04.13.03.18.58; Thu, 13 Apr 2006 03:18:59 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1FTyt3-00047j-LH for rs_out_1@blacksheep.org; Thu, 13 Apr 2006 11:17:17 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1FTyt3-00047a-49 for rsgb_lf_group@blacksheep.org; Thu, 13 Apr 2006 11:17:17 +0100 Received: from smtp05.wanadoo.nl ([194.134.35.145]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1FU09R-00046S-NY for rsgb_lf_group@blacksheep.org; Thu, 13 Apr 2006 12:38:18 +0100 Received: from pa3fnyzus90725 (cd4400af3.cable.wanadoo.nl [212.64.10.243]) by smtp5.wanadoo.nl (Postfix) with SMTP id 44C0537754; Thu, 13 Apr 2006 12:16:45 +0200 (CEST) From: "Victor van kooten" To: "blacksheep" , Date: Thu, 13 Apr 2006 12:16:35 +0200 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Importance: Normal X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=disabled,AWL=0.205 Subject: LF: preamp Content-Type: text/plain; charset="iso-8859-1" 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 Status: O X-Status: X-Keywords: X-UID: 6801 Hello Uwe The transformers I used are 7mm IF transformers used in transistor radios. wit=white geel=yellow zwart=black When you are interested in building this preamp I do have a few sets of transformers left I can sent to you,I even have a complete board in working order left,just let me know..About 5 amateurs in Utrecht are using this preamp with succes. best regards Victor PA3FNY PS: a resistor of 100 Ohm should be connected in series with the base of the BC550C to suppress possible parasitics.