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: EATSERVER: mailn 1166; 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 v4UD9qlj032129 for ; Tue, 30 May 2017 15:09:53 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dFgp9-0002dy-A9 for rs_out_1@blacksheep.org; Tue, 30 May 2017 14:04:35 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dFgp7-0002dp-2c for rsgb_lf_group@blacksheep.org; Tue, 30 May 2017 14:04:33 +0100 Received: from smtpout5.wanadoo.co.uk ([80.12.242.80] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1dFgp3-0005cb-OL for rsgb_lf_group@blacksheep.org; Tue, 30 May 2017 14:04:31 +0100 Received: from AGB ([95.151.119.162]) by mwinf5d63 with ME id Sd4R1v00T3WKBon03d4R8f; Tue, 30 May 2017 15:04:28 +0200 X-ME-Helo: AGB X-ME-Date: Tue, 30 May 2017 15:04:28 +0200 X-ME-IP: 95.151.119.162 Message-ID: <763E86D009A24DEC99503C77E38C06CB@AGB> 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> <592C27E0.9080806@posteo.de> In-Reply-To: <592C27E0.9080806@posteo.de> Date: Tue, 30 May 2017 14:04:24 +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 170529-6, 29/05/2017), Outbound message X-Antivirus-Status: Clean X-Scan-Signature: 3f8d74a8c70dd416d0a3a1dbcb9bb89f 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: 11834 80w Exciter more like ) Ive found, what is a 500 watt , 500KHz power module , the design was to minimise transformer geometry, which uses discrete logic, to fabricate the H drive requirements , there seam's to be sufficient information available , to question the choice of a half bridge , over that of the full version? , Its tempting to link the harmonic content , with the high loss rate of devices , In your 136 vk experiments, with the H , did you loose fets , other than by loss of tune ? Is there a ferrite , that is comfortable in 136 and 477 service ? In terms of compact driver 'devices' yes, are about, but, may be the additional functions are of little use in this application .. but worth consideration for a driver, having no transformer , effectively all band from audio up ? , the on-frequency aspect is compelling .. 73-G, -------------------------------------------------- From: "DK7FC" Sent: Monday, May 29, 2017 2:53 PM To: Subject: Re: LF: Iron dust toroids and heating/H bridge > 80 watt, yes that's a good driver. > > Am 29.05.2017 15:45, schrieb Graham: >> 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 > --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus