Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-di05.r1000.mx.aol.com (Internet Inbound) with ESMTP id CD045380000BB; Mon, 4 Feb 2013 19:52:45 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1U2Wkn-0006kC-Dj for rs_out_1@blacksheep.org; Tue, 05 Feb 2013 00:51:17 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1U2Wkn-0006k3-0g for rsgb_lf_group@blacksheep.org; Tue, 05 Feb 2013 00:51:17 +0000 Received: from mail-ia0-f173.google.com ([209.85.210.173]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1U2Wkk-0005E3-7Z for rsgb_lf_group@blacksheep.org; Tue, 05 Feb 2013 00:51:15 +0000 Received: by mail-ia0-f173.google.com with SMTP id h37so4470326iak.4 for ; Mon, 04 Feb 2013 16:50:52 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:date:message-id:subject:from:to :content-type; bh=linGb6a+BCTv6F7JN4o3EmDH4CK5G5km42MdMAWnGeQ=; b=MEAWHWMKS9VLcQMzC/54g3KvH+9J/JYDqXXj5IoL6Quz4OKtYBx2slD8kCHFrJrpvg O+CNWfluv8ti99TEkwj88Kdk1JDAzHgGir9KlrWfRtG3H/nGFWP4RhOc+4aF/St5H3NQ ItdZxuYQq/ZbXuFr9B2tntNGUm5JvcqCXjCtJdNuOrZxjqtPeovOF4YktYjFsQH9tXMJ cl1ocB6oMdyuEZvsfZbbyIiJk+v9a/NxxqXQWgnF6eaZWB2kH1ioUGD4/rCS57RazXlS wxujO3vPU7cXTRkaOE6F6hRdh2C8IUjN5kU26K4XYT+byJ1Dv7N6A4ggf41nXQ3CkLHB hgIg== MIME-Version: 1.0 X-Received: by 10.50.196.138 with SMTP id im10mr10066134igc.83.1360025451831; Mon, 04 Feb 2013 16:50:51 -0800 (PST) Received: by 10.50.28.47 with HTTP; Mon, 4 Feb 2013 16:50:51 -0800 (PST) Date: Tue, 5 Feb 2013 11:50:51 +1100 Message-ID: From: Dimitrios Tsifakis To: rsgb_lf_group@blacksheep.org X-Spam-Score: -0.7 (/) 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: 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: [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.210.173 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dtsifakis[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 59677119386dcf9f1872cb454dc1331d Subject: LF: My transmit converter description Content-Type: text/plain; charset=ISO-8859-1 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-AUTHENTICATION: mtain-di05.r1000.mx.aol.com ; domain : gmail.com DKIM : fail x-aol-sid: 3039ac1da609511057dd4a17 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none 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/ 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