Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: INFN-TO: mailn 1233; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v4TDnWDm028024 for ; Mon, 29 May 2017 15:49:33 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dFKzQ-0004Dg-Fs for rs_out_1@blacksheep.org; Mon, 29 May 2017 14:45:44 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dFKz8-0004DX-JY for rsgb_lf_group@blacksheep.org; Mon, 29 May 2017 14:45:26 +0100 Received: from smtpout1.wanadoo.co.uk ([80.12.242.29] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1dFKz5-0000u7-Db for rsgb_lf_group@blacksheep.org; Mon, 29 May 2017 14:45:25 +0100 Received: from AGB ([95.150.163.36]) by mwinf5d07 with ME id SDlN1v00H0nRqAf03DlNfX; Mon, 29 May 2017 15:45:22 +0200 X-ME-Helo: AGB X-ME-Date: Mon, 29 May 2017 15:45:22 +0200 X-ME-IP: 95.150.163.36 Message-ID: From: "Graham" To: References: <1456380282.20170524154713@gmail.com> <5925A16B.7050100@posteo.de> <48702557.20170525114046@gmail.com> <5926C96B.7050206@posteo.de> <592BE75B.6050507@posteo.de> <14F17A83F5334ED2A74ED75E758C1DCE@AGB> <592C1F3D.2000408@posteo.de> In-Reply-To: <592C1F3D.2000408@posteo.de> Date: Mon, 29 May 2017 14:45:22 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: Avast (VPS 170529-0, 29/05/2017), Outbound message X-Antivirus-Status: Clean X-Scan-Signature: 66d07794ca19cd68f7d6cc289cd4ac18 Subject: Re: LF: Iron dust toroids and heating/H bridge Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.75 Status: O X-Status: X-Keywords: X-UID: 11819 More of a power block, that would run on 136/477 with little modification, just one out put device and filter needed , low harmonic power levels probably help .. with a dedicated driver 'ic' , possible, fet's would have a longer life span, ) may be power level control as well .. the on frequency aspect is useful Found a 80 watt 500 Khz inverter with H ic drive Or just wind a transformer .. Tnx-G -------------------------------------------------- From: "DK7FC" Sent: Monday, May 29, 2017 2:16 PM To: Subject: Re: LF: Iron dust toroids and heating/H bridge > ...i would say it's not worth looking at. But it depends on the attitude. > If your goal is to learn about the performance of these highly integrated > H bridges, then the result will be positive because you WILL learn, FETs > dead or alive, so it would be worth to try. If your goal is to become > active on 137 kHz with QRO then i would not bother with them... > > 73, Stefan > > Am 29.05.2017 15:05, schrieb Graham: >> >>>> Have you looked at these ? ?, >> >>> As far as i know the ones which are cheap and available in small amounts >>> are not suitable for 137 kHz and such power levels. >> >> Tnx Stefan, I see some listed , which appear to be high frequency >> etc, but yes as to suitability , cost might be a issue as well .. >> >> worth looking at ? >> >> 73-Graham > --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus