Return-Path: Received: from rly-ma05.mx.aol.com (rly-ma05.mail.aol.com [172.20.116.49]) by air-ma06.mail.aol.com (v120.9) with ESMTP id MAILINMA061-8a8472f013810d; Mon, 05 Nov 2007 06:40:46 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma05.mx.aol.com (v120.9) with ESMTP id MAILRELAYINMA052-8a8472f013810d; Mon, 05 Nov 2007 06:40:42 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ip0Jn-0005wy-L1 for rs_out_1@blacksheep.org; Mon, 05 Nov 2007 11:40:35 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ip0Jn-0005wp-5F for rsgb_lf_group@blacksheep.org; Mon, 05 Nov 2007 11:40:35 +0000 Received: from smtpout0160.sc1.he.tucows.com ([64.97.136.160] helo=n064.sc1.he.tucows.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Ip0Jk-0004t8-Fk for rsgb_lf_group@blacksheep.org; Mon, 05 Nov 2007 11:40:35 +0000 Received: from g3kev (62.252.235.101) by n064.sc1.he.tucows.com (7.2.069.1) id 47030C3D0027F333 for rsgb_lf_group@blacksheep.org; Mon, 5 Nov 2007 11:40:26 +0000 Message-ID: <007301c81fa0$aabd9a00$65ebfc3e@g3kev> From: "hamilton mal" To: "rsgb" Date: Mon, 5 Nov 2007 11:39:54 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: CLASS D E Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : Hi all Tnx to all for the information, but some of the figures do not work out. How are the % figures measured. One simple method is to calculate the DC input PWR in watts (I x V) then using an RF current meter calculate the PWR out (Isq x R) let R be the norm 50 ohm D/load. Compare the two figures and calculate the Eff % 73 de Mal/G3KEV