Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md05.r1000.mx.aol.com (Internet Inbound) with ESMTP id C5468380001E8; Tue, 5 Feb 2013 17:08:26 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1U2q8l-0002iE-HR for rs_out_1@blacksheep.org; Tue, 05 Feb 2013 21:33:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1U2q8l-0002i5-4B for rsgb_lf_group@blacksheep.org; Tue, 05 Feb 2013 21:33:19 +0000 Received: from mail-ie0-f182.google.com ([209.85.223.182]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1U2q8i-00014Z-OT for rsgb_lf_group@blacksheep.org; Tue, 05 Feb 2013 21:33:18 +0000 Received: by mail-ie0-f182.google.com with SMTP id k14so920122iea.13 for ; Tue, 05 Feb 2013 13:32:54 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:content-type; bh=oN2al4gKmuwVKU42SuL+SYrL1qgSNtLJ2lIBhNQktmU=; b=GVyBDahXgOgGNn56v0rX0vTqS1icgR2KAV0Gkxk7ky8BsQL4/lvlzd3ZwI+T63WuKV oSRg/G4zZ0pEHwhkcZF8v0UP2n8VPksjxiSDA3sKb+u3IluyB2KvknBcop9ONgFUA7bJ OSoJ0eNt+XeMiIFBBiBukdd6njQ8YNqx2i+w8QaCcG3rnctC6G2ati6XWB9YhgQDnAgm Sf3j+tTGNdTb2rwGm10t+oTI0thTXV9XsRsJmnfJX8Mr131lrRAi4risfTcTrET4o83W hSO8yhzFr3cr9jLFpNPbn8Dma9msqtCmlJH7ZALliBHLt9luwyM9t+fqIvws3xAOuIWq yEnw== MIME-Version: 1.0 X-Received: by 10.50.17.201 with SMTP id q9mr875864igd.107.1360099974533; Tue, 05 Feb 2013 13:32:54 -0800 (PST) Received: by 10.50.28.47 with HTTP; Tue, 5 Feb 2013 13:32:54 -0800 (PST) In-Reply-To: References: <001301ce03c5$495bd9c0$0401a8c0@xphd97xgq27nyf> Date: Wed, 6 Feb 2013 08:32:54 +1100 Message-ID: From: Dimitrios Tsifakis To: rsgb_lf_group@blacksheep.org X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: > The whole point of this design is that the output impedance is 50 ohm, > therefore there is no need for impedance transformation! Try > calculating the values for a 100 V, 100 W Class-E transmitter and note > the output impedance. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.223.182 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dtsifakis[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 4ad5f3f1a9241b934aaa5d0e23c9dc57 Subject: Re: LF: Re: My transmit converter description Content-Type: text/plain; charset=ISO-8859-1 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-SCOLL-AUTHENTICATION: mtain-md05.r1000.mx.aol.com ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d6059511182da0463 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none > The whole point of this design is that the output impedance is 50 ohm, > therefore there is no need for impedance transformation! Try > calculating the values for a 100 V, 100 W Class-E transmitter and note > the output impedance. For those not familiar with Class-E, I can control the power output of a transmitter by the Vcc I use. The power output is proportional to the square of the voltage, so by reducing the voltage by SQRT(2), I get half power: 50 W from 70 volts or so. The calculated output impedance and C1/C2/L2 do not change with scaling the voltage up and down. That makes class-e an excellent client for amplitude modulation :-) 73, Dimitris