Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 000BF380000B4; Fri, 16 Nov 2012 13:49:55 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TZQxf-000887-8c for rs_out_1@blacksheep.org; Fri, 16 Nov 2012 18:48:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TZQxe-00087y-Rh for rsgb_lf_group@blacksheep.org; Fri, 16 Nov 2012 18:48:18 +0000 Received: from mbox2.netikka.net ([213.250.81.203]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1TZQxc-0005Lu-Gi for rsgb_lf_group@blacksheep.org; Fri, 16 Nov 2012 18:48:17 +0000 Received: from hupu.netikka.net (hupu [172.16.83.91]) by mbox2-feedback.netikka.net (Postfix) with ESMTP id E115321F7FF for ; Fri, 16 Nov 2012 20:48:14 +0200 (EET) Received: from w3mail-7.netikkabb.fi (w3mail-lb1.netikka.fi [81.209.31.92]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by hupu.netikka.net (Postfix) with ESMTPS id EA1454B004B for ; Fri, 16 Nov 2012 20:48:14 +0200 (EET) Received: from www-data by w3mail-7.netikkabb.fi with local (Exim 4.72) (envelope-from ) id 1TZQxa-0000ol-0H for rsgb_lf_group@blacksheep.org; Fri, 16 Nov 2012 20:48:14 +0200 Received: from t190.ip3.netikka.fi (t190.ip3.netikka.fi [85.157.71.190]) by posti.anvianet.fi (Horde Framework) with HTTP; Fri, 16 Nov 2012 20:48:13 +0200 Date: Fri, 16 Nov 2012 20:48:13 +0200 Message-ID: <20121116204813.Horde.U1f8InvPcNVQpopt4aLQwcA@posti.anvianet.fi> From: phl@netikka.fi To: rsgb_lf_group@blacksheep.org References: <50A559AA.40207@iup.uni-heidelberg.de> In-Reply-To: <50A559AA.40207@iup.uni-heidelberg.de> User-Agent: Internet Messaging Program (IMP) H4 (5.0.23) MIME-Version: 1.0 Content-Disposition: inline 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: Very nice indeed! I would still also change the TX LPF that is switched into use when the rig is on 475kHz with the usual 6800pF/15uH components used in many designs. T94-2 or T106-2 cores should be fine for the coils at that power level. After that I would also make sure the output transformer does not run too hot at the intended max. output power level. [...] 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 [213.250.81.203 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-Scan-Signature: b77892ad90d0261eaf071f4f6cf31464 Subject: Re: LF: How to become QRV on 630m Content-Type: text/plain; charset=iso-8859-15; format=flowed; DelSp=Yes 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=0.3 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-sid: 3039ac1d605550a68ad37a4e X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Very nice indeed! I would still also change the TX LPF that is switched into use when the rig is on 475kHz with the usual 6800pF/15uH components used in many designs. T94-2 or T106-2 cores should be fine for the coils at that power level. After that I would also make sure the output transformer does not run too hot at the intended max. output power level. This mod suggestion came just in time, I think we have a contender to apply it on. Will report how it turned out in case we get a go at it. BR Paul-Henrik, OH1LSQ Quoting Stefan Sch=E4fer : > MF, > > Just found this nice to read article in the web: > http://www.ov-erding.de/630m_Band.pdf > German language. > The OM modified an old IC735 to produce 50W RF power on 630m! > He reports about a QSO to DF0WD :-) > > 73, Stefan/DK7FC