Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 85284380000BA; Sat, 17 Dec 2011 11:25:37 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Rbx49-0000dW-E7 for rs_out_1@blacksheep.org; Sat, 17 Dec 2011 16:24:53 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Rbx49-0000dN-26 for rsgb_lf_group@blacksheep.org; Sat, 17 Dec 2011 16:24:53 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Rbx46-0003aK-TI for rsgb_lf_group@blacksheep.org; Sat, 17 Dec 2011 16:24:52 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id pBHGOo2u003618 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 17 Dec 2011 17:24:50 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id pBHGOnYc018883; Sat, 17 Dec 2011 17:24:49 +0100 Message-ID: <4EECC1E8.4000806@iup.uni-heidelberg.de> Date: Sat, 17 Dec 2011 17:23:04 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org CC: Roman References: <033201ccbcab$5c5fe640$1502a8c0@Clemens04> <000901ccbcc4$42768fe0$c763afa0$@com> In-Reply-To: <000901ccbcc4$42768fe0$c763afa0$@com> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: TX system at DK7FC, schematic Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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: 0:2:401401792:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1dc1484eecc28105b7 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Terry, LF, I want to add something to the TX/antenna matching discussion. There have often been querys about a schematic of my TX/PA system. So i finally took the time to draw it, how it looks in principle. It is just one example how it can be done of course. Maybe it helps to get further ideas how you can do it one your side. http://dl.dropbox.com/u/19882028/LF/DK7FC_137kHz_TX_antenna_and_PA_schematic.jpg Best 73, Stefan/DK7FC Am 17.12.2011 15:00, schrieb Terry GW0EZY: > First of all thanks to Andy for starting the Wellbrook discussion - it has > been very useful for me. > > James - thanks for the information on the pros/cons of using Litz wire. > Although it seems obvious now, I hadn't realised the meaning of 10/44. > > Mal - thanks for your helpful advice and info on your antenna loading > arrangements. I am still trying to picture it all in my mind but it seems > like the sort of relatively simple system I'm looking for - especially > keeping to 50 ohms. I have yet to find a supplier of the metal lined CH pipe > (Srewfix B&Q??) > > [...] >