Return-Path: Received: from mtain-db07.r1000.mx.aol.com (mtain-db07.r1000.mx.aol.com [172.29.64.91]) by air-de07.mail.aol.com (v126.13) with ESMTP id MAILINDE074-5ebd4b4c52ff3ad; Tue, 12 Jan 2010 05:46:23 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-db07.r1000.mx.aol.com (Internet Inbound) with ESMTP id 8E48838000258; Tue, 12 Jan 2010 05:46:21 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NUeFb-0008CK-N9 for rs_out_1@blacksheep.org; Tue, 12 Jan 2010 10:45:27 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NUeFb-0008CB-3Q for rsgb_lf_group@blacksheep.org; Tue, 12 Jan 2010 10:45:27 +0000 Received: from lnx503.hrz.tu-darmstadt.de ([130.83.156.232]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NUeFZ-0004yn-77 for rsgb_lf_group@blacksheep.org; Tue, 12 Jan 2010 10:45:27 +0000 Received: from FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de (File-Server-HST.hst.e-technik.tu-darmstadt.de [130.83.212.129]) by lnx503.hrz.tu-darmstadt.de (8.14.2/8.14.2/HRZ/PMX) with SMTP id o0CAjNMw032571 for ; Tue, 12 Jan 2010 11:45:24 +0100 (envelope-from schaefer@hst.tu-darmstadt.de) Received: from [127.0.0.1] (helo=File-Server-HST.hst.e-technik.tu-darmstadt.de) by FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de with AVK MailGateway; for ; Tue, 12 Jan 2010 11:45:22 +0100 Content-class: urn:content-classes:message MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Tue, 12 Jan 2010 11:42:31 +0100 Message-ID: <38A51B74B884D74083D7950AD0DD85E82A1A94@File-Server-HST.hst.e-technik.tu-darmstadt.de> X-MS-Has-Attach: X-MS-TNEF-Correlator: <38A51B74B884D74083D7950AD0DD85E82A1A94@File-Server-HST.hst.e-technik.tu-darmstadt.de> Thread-Topic: LF: PA0 into Alaska 600m Thread-Index: AcqTVc6/k7mtFMO1R+yQFFtyUO9j1QAHiLBk References: <20100111090709.EAAFE31E706@smtps01.kuleuven.be> <4B4C1D36.3090707@telia.com> From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= To: X-AVK-Virus-Check: AVB 19.671;11.01.2010 X-PMX-TU: seen v0.99a by 5.5.8.383112, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.1.12.103318 X-PMX-SPAMCHECK: outgoing mail X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01CA9374.56FE9BC4" Subject: AW: LF: PA0 into Alaska 600m 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-global-disposition: G X-AOL-VSS-INFO: 5400.1158/52684 X-AOL-VSS-CODE: Scan Clean x-aol-sid: 3039ac1d405b4b4c52fd3a40 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) X-AOL-VSS-CODE: scan_error X-AOL-VSS-INFO: 5400.1158/0 ------_=_NextPart_001_01CA9374.56FE9BC4 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Johan,=20 =20 What are you planning? This sounds like QROO? Why using a push-pull class= E stage when a single stange can do it? I am interested! :-) =20 Stefan/DK7FC ________________________________ Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Johan H. Bodin Gesendet: Di 12.01.2010 07:56 An: rsgb_lf_group@blacksheep.org Betreff: Re: LF: PA0 into Alaska 600m Hi Andy, I tried to connect two class E stages in push-pull and it worked as expected. This was a QRP experiment on 160m but I see no reason why it shouldn't be scalable. The even harmonic cancellation of the symmetrical design is welcome since the drain waveform contains quite a lot of 2f. Each side is designed for half the output power into some R and then the matching transformer is designed to have 2R looking into the primary. The two series resonant tanks can be combined into a single one having half the C and twice the L (as in the attached picture). Who will be the first to try a QRO version of this amplifier? :-) 73 Johan SM6LKM Andy Talbot wrote: > All designs & ideas for a 1kW+ Class E PA gratefully accepted :-) > I do have a 50V 25A PSU, so it 'might' even be feasible. >=20 > Two big meaty FETs in parallel may cope. There's an article in the > latest QEX, just arrived, that appears to run class E stages in parallel > - but its part of another concept, not targetted at high power /per-se/. ------_=_NextPart_001_01CA9374.56FE9BC4 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: base64 eJ8+IhcKAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEgAEAHQAAAEFXOiBMRjogUEEwIGludG8g QWxhc2thIDYwMG0ACQgBBYADAA4AAADaBwEADAALACoAHwACAEQBASCAAwAOAAAA2gcBAAwACwAt ABUAAgA9AQEJgAEAIQAAADRERTREMTAxODMwQjc5NEVBMEVFRDBCOTU1QUU4RDBFAFgHAQOQBgDQ EAAAOAAAAAMANgAAAAAAQAA5AFtNgvFzk8oBHgA9AAEAAAAFAAAAQVc6IAAAAAACAUcAAQAAADIA AABjPURFO2E9IDtwPUhTVDtsPUZJTEUtU0VSVkVSLUgtMTAwMTEyMTA0NTIxWi0xMjk5AAAAHgBJ AAEAAAAdAAAAUmU6IExGOiBQQTAgaW50byBBbGFza2EgNjAwbQAAAABAAE4AAL96bFSTygEeAFoA AQAAACMAAABvd25lci1yc2diX2xmX2dyb3VwQGJsYWNrc2hlZXAub3JnAAACAVsAAQAAAGMAAAAA AAAAgSsfpL6jEBmdbgDdAQ9UAgAAAABvd25lci1yc2diX2xmX2dyb3VwQGJsYWNrc2hlZXAub3Jn 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