Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 153433800032A; Tue, 18 Dec 2012 16:08:48 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Tl4OD-0006Xc-Lq for rs_out_1@blacksheep.org; Tue, 18 Dec 2012 21:07:49 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Tl4OD-0006XT-8E for rsgb_lf_group@blacksheep.org; Tue, 18 Dec 2012 21:07:49 +0000 Received: from mail-ie0-f173.google.com ([209.85.223.173]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1Tl4OA-0004xc-VK for rsgb_lf_group@blacksheep.org; Tue, 18 Dec 2012 21:07:48 +0000 Received: by mail-ie0-f173.google.com with SMTP id e13so1662500iej.18 for ; Tue, 18 Dec 2012 13:07:25 -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:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=1JCdGnZERNfrERMiUL5SfC4ARjfrccpYHb4oJND5poc=; b=eQqSbtf/J9gxLc7wF9bwROeniypya8yfCMbToijgs5DnALUV4eGHGqFLuHBuAfdr2o UN857k8x+S6HoCZJkbx+VObiANbPZkfAneKgcD0WKYFYShKUnLUSUyok80R1Fc9nf9ML fyZCtK73NOdvljHNFwpVQxELuWOQtpgIVBOmU6FumuztHxeSCt/LNuVqtN2WrM25zXFF wMj22wdPMKhvc/lryHvL2aS6CCDQzXdq++xHvavkkkOrt9KFYlNBebWHvHsyu55dB/+M unQ/CmLq1TwuLFkeXIpR0Mkqt3ZcNj37VfKuSMsJMEAnUnLvfbB96Oesq0UWi9qvGfs7 QGCA== MIME-Version: 1.0 Received: by 10.50.0.140 with SMTP id 12mr4935623ige.63.1355864845173; Tue, 18 Dec 2012 13:07:25 -0800 (PST) Received: by 10.231.157.74 with HTTP; Tue, 18 Dec 2012 13:07:25 -0800 (PST) In-Reply-To: <20121218152622.Horde.XfcUIerSz0VQ0G7_VqKUnlA@posti.anvianet.fi> References: <20121218092921.Horde.h2yZX_rSz0VQ0BtRPVIC2uA@posti.anvianet.fi> <20121218100332.Horde.2ASBc_rSz0VQ0CNU8mNkBhA@posti.anvianet.fi> <20121218152622.Horde.XfcUIerSz0VQ0G7_VqKUnlA@posti.anvianet.fi> Date: Wed, 19 Dec 2012 08:07:25 +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: By the way, here is my current 40 m 807 transmitter.This was the first attempt at building a valve TX. people.physics.anu.edu.au/~dxt103/valves/807/ I will use the same type of chassis for the 472 kc version but I will use an old 450-0-450 (50 mA), transformer which also has a 225-0-225 and 6.3 windings, for a more compact result. My hope is that I can draw a bit more than 50 mA without overheating the transformer and is based on the fact that CW is not 100% duty cycle and also I am not using the other windings to their maximum current ratings. [...] 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 [209.85.223.173 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: cc2e5baae40f8f7a09b47e6877ef0bfb Subject: Re: LF: Better picture of the 807 based 500kHz TX 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-dl02.r1000.mx.aol.com ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d4ad050d0db60585c X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none By the way, here is my current 40 m 807 transmitter.This was the first attempt at building a valve TX. people.physics.anu.edu.au/~dxt103/valves/807/ I will use the same type of chassis for the 472 kc version but I will use an old 450-0-450 (50 mA), transformer which also has a 225-0-225 and 6.3 windings, for a more compact result. My hope is that I can draw a bit more than 50 mA without overheating the transformer and is based on the fact that CW is not 100% duty cycle and also I am not using the other windings to their maximum current ratings. 73, Dimitris VK1SV