Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dh03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1CC6A38000082; Mon, 12 Mar 2012 03:47:41 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1S6zxL-0007zO-0a for rs_out_1@blacksheep.org; Mon, 12 Mar 2012 07:46:11 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1S6zxK-0007zF-Bc for rsgb_lf_group@blacksheep.org; Mon, 12 Mar 2012 07:46:10 +0000 Received: from mail.senselan.ch ([194.153.189.2]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1S6zxJ-0007GM-0t for rsgb_lf_group@blacksheep.org; Mon, 12 Mar 2012 07:46:10 +0000 Received: (qmail 11906 invoked from network); 12 Mar 2012 07:46:07 -0000 Received: from webmail.senselan.ch (194.153.189.10) by mail.senselan.ch with SMTP; 12 Mar 2012 07:46:07 -0000 Received: from 157-7.cable.senselan.ch (157-7.cable.senselan.ch [83.222.157.7]) by webmail.senselan.ch (Horde) with HTTP for ; Mon, 12 Mar 2012 08:46:06 +0100 Message-ID: <20120312084606.dxpv1mzzggwokgs8@webmail.senselan.ch> Date: Mon, 12 Mar 2012 08:46:06 +0100 From: traumwandler@sensemail.ch To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Disposition: inline User-Agent: Internet Messaging Program (IMP) H3 (4.0.1) X-Spam-Score: 1.9 (+) X-Spam-Report: autolearn=disabled,MISSING_SUBJECT=1.345,NO_REAL_NAME=0.55 Subject: LF: 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=0.3 required=5.0 tests=NO_REAL_NAME 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: 0:2:198310928:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d41174f5daa1d36dc X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Paolo here you may find the pictures of the LF/MF Matchbox. As you see, switching is done by relays: http://funkperlen.blogspot.com/2012/03/lfmf-matchbox.html And here are the schematics of my LF TX: http://funkperlen.blogspot.com/2012/03/136-khz-tx.html Sorry for the bad drawings. In the meantime I've replaced the VFO by a DDS. BTW My MF TX for our future 472kHz Band is built on the same base: http://funkperlen.wordpress.com/2010/12/23/seltene-vogel/ It's a simple design and it works perfect (at least in the dummy load, hi) 73 de Toni, HB9ASB PS. mni tnx to David, G3YMX who designed the original!