Return-Path: Received: from mtain-dd01.r1000.mx.aol.com (mtain-dd01.r1000.mx.aol.com [172.29.64.141]) by air-dc08.mail.aol.com (v126.13) with ESMTP id MAILINDC084-86a64b4de0c5375; Wed, 13 Jan 2010 10:03:33 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dd01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7AC7E3800006E; Wed, 13 Jan 2010 10:03:30 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NV4jt-0003nc-HA for rs_out_1@blacksheep.org; Wed, 13 Jan 2010 15:02:29 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NV4jt-0003nT-3x for rsgb_lf_group@blacksheep.org; Wed, 13 Jan 2010 15:02:29 +0000 Received: from smtp-vbr5.xs4all.nl ([194.109.24.25]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NV4jr-0000YJ-EO for rsgb_lf_group@blacksheep.org; Wed, 13 Jan 2010 15:02:29 +0000 Received: from PCvanAlbert (a80-101-33-132.adsl.xs4all.nl [80.101.33.132]) by smtp-vbr5.xs4all.nl (8.13.8/8.13.8) with SMTP id o0DF2A3F032765 for ; Wed, 13 Jan 2010 16:02:23 +0100 (CET) (envelope-from westberg@xs4all.nl) Message-ID: <77AEBAC7CA0D44CAB48CC6E6BB012CED@PCvanAlbert> From: "Albert" To: References: <001201ca9444$ed415810$0301a8c0@your91hoehfy9g> In-Reply-To: <001201ca9444$ed415810$0301a8c0@your91hoehfy9g> Date: Wed, 13 Jan 2010 16:02:05 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18005 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18005 X-Virus-Scanned: by XS4ALL Virus Scanner X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Re: DECCA 5501 tx Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01CA9469.C04450E0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MISSING_OUTLOOK_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 x-aol-global-disposition: G x-aol-sid: 3039ac1d408d4b4de0c21a6d X-AOL-IP: 193.82.116.20 ------=_NextPart_000_000E_01CA9469.C04450E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Mal, I can't help you, but I use the same PA here. Changed the capacitor ba= nks and the coils and with some tweaking of the coils, I put them on= frequency one by one. I just tuned for maximum power, and the heatsin= ks are getting just warm at full power. I started with 20 V supply vol= tage during the tuning process and the PA was driven by a signal gener= ator, so I could simple find resonance frequency and step by step clos= ing in at 500 kHz. The DECCA PA gives me a nice 800W in 50 ohms at 48V= supply voltage. =20 73, Albert PA0A =20 ----- Original Message -----=20 From: malhamilton=20 To: rsgb=20 Sent: Wednesday, January 13, 2010 12:38 PM Subject: LF: DECCA 5501 tx Does anyone know if the series L and C was tuned for resonance at th= e operating freq or meant to be adjusted for optimum switching charact= eristics like in class E mal/g3kev ------=_NextPart_000_000E_01CA9469.C04450E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hello Mal,
 
I can't help you, but I use the same= PA here.=20 Changed the capacitor banks and the coils and with some tweaking= of the=20 coils, I put them on frequency one by one. I just tuned for maximum po= wer, and=20 the heatsinks are getting just warm at full power. I started with= 20 V=20 supply voltage during the tuning process and the PA was driven by a si= gnal=20 generator, so I could simple find resonance frequency= and step by=20 step closing in at 500 kHz. The DECCA PA gives me a nice&nbs= p;800W in=20 50 ohms at 48V supply voltage.
 
73, Albert=20 PA0A     
----- Original Message -----
From:=20 malhamilton
To: rsgb
Sent: Wednesday, January 13,= 2010 12:38=20 PM
Subject: LF: DECCA 5501 tx

Does anyone know if the series L an= d C was tuned=20 for resonance at the operating freq or meant to be adjusted for opti= mum=20 switching characteristics like in class E
mal/g3kev
 
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