Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-da05.r1000.mx.aol.com (Internet Inbound) with ESMTP id A5EBE3800009E; Tue, 5 Feb 2013 02:47:40 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1U2dEQ-0007Mf-FW for rs_out_1@blacksheep.org; Tue, 05 Feb 2013 07:46:18 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1U2dEQ-0007MT-24 for rsgb_lf_group@blacksheep.org; Tue, 05 Feb 2013 07:46:18 +0000 Received: from alinga.sron.nl ([131.211.40.2]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1U2dEO-00061B-5H for rsgb_lf_group@blacksheep.org; Tue, 05 Feb 2013 07:46:16 +0000 Received: by localhost.sron.nl (TUNIX/Firewall Mail Server) with ESMTP id 03CB0F74C4 for ; Tue, 5 Feb 2013 08:45:56 +0100 (CET) Received: by alinga.sron.nl (TUNIX/Firewall Mail Server) with ESMTP for ; Tue, 5 Feb 2013 08:45:56 +0100 (CET) Received: by filter.sron.nl (Postfix, from userid 1000) id ED08F3A604F; Tue, 5 Feb 2013 08:45:55 +0100 (CET) Received: from gw1.sron.nl (gw1.sron.nl [172.16.40.26]) by filter.sron.nl (Postfix) with ESMTP id 2B2A13A6025 for ; Tue, 5 Feb 2013 08:45:50 +0100 (CET) Received: from SRON-MTA by gw1.sron.nl with Novell_GroupWise; Tue, 05 Feb 2013 08:45:50 +0100 Message-Id: <5110C6B8020000FA0001897D@gw1.sron.nl> X-Mailer: Novell GroupWise Internet Agent 8.0.2 Date: Tue, 05 Feb 2013 08:45:44 +0100 From: "Victor van Kooten" To: References: In-Reply-To: Mime-Version: 1.0 Content-Disposition: inline X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Looks very nice Dimitris,hope to see/hear you soon, 73 Victor [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: e09cca6d8e44a91eadbdfb3e1b8aec09 Subject: Re: LF: My transmit converter description Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable 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-sid: 3039ac1d404d5110b91c5ab8 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Looks very nice Dimitris,hope to see/hear you soon, 73 Victor >>> Dimitrios Tsifakis 05/02/2013 01:50 >>> Hello group, My transmit converter is now finished and tested - it survived two sessions of 50% duty cycle WSPR transmissions on 475 kHz and the results are great. I thought others may find this useful, so I have put a write-up on my web page: http://people.physics.anu.edu.au/~dxt103/472/nltt/=20 It is a 50 W class-e PA designed for 50 ohm impedance, so there is no need for an impedance transformer. Doesn't get simpler than that :-) The driving circuit is based on G3XBM Roger's design with the difference of a 10 MHz OCXO LO and the addition of a beefy MOSFET driver. 73, Dimitris VK1SV