Return-Path: Received: from rly-md05.mx.aol.com (rly-md05.mail.aol.com [172.20.29.143]) by air-md03.mail.aol.com (v124.15) with ESMTP id MAILINMD034-9074a966b6630c; Thu, 27 Aug 2009 07:18:15 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md05.mx.aol.com (v124.15) with ESMTP id MAILRELAYINMD057-9074a966b6630c; Thu, 27 Aug 2009 07:18:01 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Mgcyl-0007Ll-P3 for rs_out_1@blacksheep.org; Thu, 27 Aug 2009 12:17:19 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Mgcyl-0007Lb-Bu for rsgb_lf_group@blacksheep.org; Thu, 27 Aug 2009 12:17:19 +0100 Received: from ttsmtp-4.cpwnetworks.com ([62.24.128.245] helo=ttsmtp.cpwnetworks.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Mgcye-0003p7-RZ for rsgb_lf_group@blacksheep.org; Thu, 27 Aug 2009 12:17:14 +0100 X-Path: TalkTalk-smtp X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApsEAM4HlkpZ8ITJ/2dsb2JhbACEd9MShBkF Received: from unknown (HELO mal769a60aa920) ([89.240.132.201]) by ttsmtp.cpwnetworks.com with SMTP; 27 Aug 2009 12:16:52 +0100 Message-ID: <006c01ca2707$e0a03310$0301a8c0@mal769a60aa920> From: "mal hamilton" To: References: <002a01ca2674$fbdbd370$0301a8c0@mal769a60aa920> <4A9588FA.5030606@telia.com> Date: Thu, 27 Aug 2009 12:16:51 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: psu Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit 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-IP: 193.82.116.20 Tnx Johan, that is one solution although I want something small and compact and frequency stable. 73 de mal/g3kev ----- Original Message ----- From: "Johan H. Bodin" To: Sent: Wednesday, August 26, 2009 8:11 PM Subject: Re: LF: psu > Hi Mal, > > since you mentioned 400Hz (I meant cycles per second of course, > sorry...) I assume that your are about to bring some wartime airborne > equipment back to life. > > If efficiency is not at highest priority, take an audio amplifier, > capable of delivering >15W with a good margin, feed a 400Hz sine wave > into its input and connect a 230V => some_low_voltage transformer > "backwards" to the amplifier's output. Adjust the volume control to get > 115V at the xfmr's output. > > 73 > Johan SM6LKM > > mal hamilton wrote: >> Need a psu that gives 115v - 15w output at 400 cps. Input could be >> anything ie mains ac or dc. >> If nothing is available I have a plan to divide a 4Mhz xtal down to 400 >> cps then amplify/step up to give 115v/15w >> 73 de mal/g3kev >> > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.392 / Virus Database: 270.13.69/2328 - Release Date: 08/26/09 12:16:00