X-GM-THRID: 1202122608845734752 X-Gmail-Labels: rsgb lf X-Gmail-Received: 4b43f6ee1a7dc2d965cec3e10f51424dc42a0bf9 Delivered-To: daveyxm@gmail.com Received: by 10.54.72.15 with SMTP id u15cs20723wra; Mon, 1 May 2006 00:49:22 -0700 (PDT) Received: by 10.48.203.8 with SMTP id a8mr400037nfg; Mon, 01 May 2006 00:49:21 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id l32si1083220nfa.2006.05.01.00.49.21; Mon, 01 May 2006 00:49:21 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1FaT6Y-0006LL-N4 for rs_out_1@blacksheep.org; Mon, 01 May 2006 08:46:02 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1FaT6Y-0006LC-57 for rsgb_lf_group@blacksheep.org; Mon, 01 May 2006 08:46:02 +0100 Received: from imo-m28.mx.aol.com ([64.12.137.9]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1FaUxP-0000ny-E4 for rsgb_lf_group@blacksheep.org; Mon, 01 May 2006 10:44:58 +0100 Received: from G0MRF@aol.com by imo-m28.mx.aol.com (mail_out_v38_r7.5.) id l.3e6.11ff519 (48624) for ; Mon, 1 May 2006 03:36:03 -0400 (EDT) From: G0MRF@aol.com Message-ID: <3e6.11ff519.31871463@aol.com> Date: Mon, 1 May 2006 03:36:03 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 SE for Windows sub 5014 X-Spam-Flag: NO X-Spam-Score: -0.9 (/) X-Spam-Report: autolearn=disabled,AWL=-1.114,HTML_60_70=0.027,HTML_MESSAGE=0.001,NO_REAL_NAME=0.178 Subject: Re: LF: RE: pictures of my new 136kHz stn Content-Type: multipart/alternative; boundary="-----------------------------1146468963" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.9 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE, HTML_MESSAGE,MAILTO_TO_SPAM_ADDR,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 Status: O X-Status: X-Keywords: X-UID: 5683 -------------------------------1146468963 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 30/04/2006 21:43:09 GMT Standard Time, ganymede444@btopenworld.com writes: Hi Dick, LF Group, What power supply voltage will you be using for your new TX, and what RF power do you hope to get out with 4 times IRFP450? 73, Dave G3WCB IO91RM Hi Dave / Dick. If it helps: I converted on of my 250W linear amplifiers which used 4 IRFP450s to class D(ish) The power output went to 700W on 136kHz. I just replaced the input phase splitting transformer with the normal class D 4426 driver chip. I also used the same amp in Scotland at 300W on 73kHz to work Jim M0BMU and Derek G3GRO who were nr Lands End. PSU was adjustable 35 to 48V. Thanks David G0MRF -------------------------------1146468963 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 30/04/2006 21:43:09 GMT Standard Time,=20 ganymede444@btopenworld.com writes:

Hi=20 Dick, LF Group,

What=20 power supply voltage will you be using for your new TX, and what RF power=20= do=20 you hope to get out with 4 times IRFP450?

73,=20 Dave G3WCB IO91RM

Hi Dave / Dick.

If it helps: I converted on of my 250W linear amplifiers which us= ed 4=20 IRFP450s to class D(ish) The power output went to 700W on 136kHz. = ; I=20 just replaced the input phase splitting transformer with the normal class D=20= 4426=20 driver chip.

I also used the same amp in Scotland at 300W on 73kHz to= =20 work Jim M0BMU and Derek G3GRO who were nr Lands End. PSU was adjustable 35=20= to=20 48V.

Thanks

David G0MRF

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