Envelope-to: dave@picks.force9.co.uk Delivery-date: Thu, 22 Sep 2005 13:57:57 +0100 Received: by ptb-mxcore16.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1EIQeC-00009K-3y for dave@picks.force9.co.uk; Thu, 22 Sep 2005 13:57:57 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore16.plus.net with esmtp (PlusNet MXCore v2.00) id 1EIQeB-000097-W4 for dave@picks.force9.co.uk; Thu, 22 Sep 2005 13:57:56 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1EIQdB-0000yg-D8 for rs_out_1@blacksheep.org; Thu, 22 Sep 2005 13:56:53 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1EIQdB-0000yX-2l for rsgb_lf_group@blacksheep.org; Thu, 22 Sep 2005 13:56:53 +0100 Received: from mail-out.astrium.eads.net ([80.156.47.35] helo=ffwfilter1.astrium.eads.net) by relay1.thorcom.net with esmtp (Exim 4.51) id 1EIR9W-0007YW-Pf for rsgb_lf_group@blacksheep.org; Thu, 22 Sep 2005 14:30:22 +0100 Received: from exdssfdh00.south.de.astrium.corp ([53.141.160.8]) by ffwfilter1.astrium.eads.net with InterScan Messaging Security Suite; Thu, 22 Sep 2005 15:00:22 +0200 Received: by exdssfdh00.south.de.astrium.corp with Internet Mail Service (5.5.2657.72) id ; Thu, 22 Sep 2005 14:56:50 +0200 Message-ID: From: "OSBORN, Chris" To: "LF Group (E-mail)" Date: Thu, 22 Sep 2005 14:56:39 +0200 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2657.72) Subject: LF: DFCW Content-Type: text/plain; charset=iso-8859-1; format=flowed 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit My new LF TX is nearly finished and I would like to add the option of DFCW. I was thinking of just placing a varicap diode in parallel with the crystal and thus pulling the frequency for achieving the dots / dashes. Can someone direct me to a circuit diagram and software to achieve this ? 73 Chris G3XIZ