Envelope-to: dave@picks.force9.co.uk Delivery-date: Sat, 21 May 2005 15:05:59 +0100 Received: from pih-spamcore04.plus.net ([192.168.71.8]) by pih-mxcore11.plus.net with esmtp (PlusNet MXCore v1.0) id 1DZUc3-0001gS-MR for dave@picks.force9.co.uk; Sat, 21 May 2005 15:05:59 +0100 Received: from Debian-exim by pih-spamcore04.plus.net with spam-scanned (Exim 4.50) id 1DZUc3-0003BY-7X for dave@picks.force9.co.uk; Sat, 21 May 2005 15:05:59 +0100 Received: from [192.168.101.74] (helo=pih-mxcore08.plus.net) by pih-spamcore04.plus.net with esmtp (Exim 4.50) id 1DZUc3-0003BV-4N for dave@picks.force9.co.uk; Sat, 21 May 2005 15:05:59 +0100 Received: from post.thorcom.com ([193.82.116.20]) by pih-mxcore08.plus.net with esmtp (PlusNet MXCore v1.0) id 1DZUc2-00020c-P9 for dave@picks.force9.co.uk; Sat, 21 May 2005 15:05:58 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1DZUbk-0003u6-VO for rs_out_1@blacksheep.org; Sat, 21 May 2005 15:05:40 +0100 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1DZUbk-0003tx-Jj for rsgb_lf_group@blacksheep.org; Sat, 21 May 2005 15:05:40 +0100 Received: from smtp814.mail.ukl.yahoo.com ([217.12.12.204]) by relay.thorcom.net with smtp (Exim 4.43) id 1DZUbj-0001sD-6B for rsgb_lf_group@blacksheep.org; Sat, 21 May 2005 15:05:40 +0100 Received: from unknown (HELO Main) (Alan.Melia@213.122.177.78 with login) by smtp814.mail.ukl.yahoo.com with SMTP; 21 May 2005 14:05:32 -0000 Message-ID: <000c01c55e0e$27295360$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <000c01c55def$a4116ee0$3fe8fc3e@l8p8y6> Date: Sat, 21 May 2005 15:05:27 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-SPF-Result: relay.thorcom.net: 217.12.12.204 is neither permitted nor denied by domain of btinternet.com Subject: LF: Re: Class E amp Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit 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-Spam-Filtered: by PlusNet SpamCORE (v4.00s) Hi Mal, the values in the spreadsheet have been tested by simulation in Simetrix and by practical builds by Joe VO1NA and Mike GW4HXO, also Finbar EI0CF (and I think a few others). It looks as though there may be a "typo" in the Tonne site (as "m" is next to "n" on the keyboard....mF would be milliFarad really !! despite the old English usage as mF to mean microfarad and mmF for "puffs"). I have only considered single ended configurations for simplicity (and I hoped, to curb the FET-popping which seemed a feature of the p-p designs). Fritz Raab in his book details p-p designs and other configurations or tuning which give the same conditions. The only problem is that I suppose you could say Class-E is a "narrow-band design" Cheers de Alan G3NYK ----- Original Message ----- From: "hamilton mal" To: Sent: 21 May 2005 11:26 Subject: LF: Class E amp Hi All The info for class E design in the G3NYK cct specifies C values in nF whereas in the Tonne design info it specifies the values in mF. I used the same paramaters as G3NYK used in his design data in the Tonne computer design prog and came up with the same figures but this time the C is in mF and not nF. Have I got something wrong or is there a mistake somewhere else, all those mf values seem very high in the Tonne design. 73 de Mal/G3KEV