Return-Path: Received: from mtain-ma02.r1000.mx.aol.com (mtain-ma02.r1000.mx.aol.com [172.29.96.10]) by air-mc06.mail.aol.com (v129.10) with ESMTP id MAILINMC063-a9754daf43472e2; Wed, 20 Apr 2011 16:34:15 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 08C993800008C; Wed, 20 Apr 2011 16:34:12 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QCe4T-0006Mj-Fj for rs_out_1@blacksheep.org; Wed, 20 Apr 2011 21:32:21 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QCe4R-0006MY-T9 for rsgb_lf_group@blacksheep.org; Wed, 20 Apr 2011 21:32:19 +0100 Received: from defout.telus.net ([204.209.205.13]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QCe4N-0001JT-4M for rsgb_lf_group@blacksheep.org; Wed, 20 Apr 2011 21:32:19 +0100 Received: from edmwcm04 ([204.209.205.13]) by priv-edmwes34.telusplanet.net (InterMail vM.8.01.03.00 201-2260-125-20100507) with ESMTP id <20110420203202.IUSC2170.priv-edmwes34.telusplanet.net@edmwcm04> for ; Wed, 20 Apr 2011 14:32:02 -0600 Received: from [192.168.1.74] ([75.157.142.115]) by edmwcm04 with bizsmtp id ZwY11g0212Vbb3f01wY1f6; Wed, 20 Apr 2011 14:32:02 -0600 X-Telus-Outbound-IP: 75.157.142.115 X-Authority-Analysis: v=1.1 cv=Ng3zRH4clTj1ZdurPHN6dZkLYtB3iR2+w+wkqIzToC4= c=1 sm=2 a=jVez_htjv6wA:10 a=98OSNnxbVy4A:10 a=LGgl8L9ij00A:10 a=8nJEP1OIZ-IA:10 a=AkulgE4VqNZj1y5HK5cA:9 a=wPNLvfGTeEIA:10 Message-ID: <4DAF42C1.8010401@telus.net> Date: Wed, 20 Apr 2011 13:32:01 -0700 From: Scott Tilley User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.15) Gecko/20110303 Lightning/1.0b2 Thunderbird/3.1.9 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: MSK with a Class D transmitter...? Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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: 3039ac1d600a4daf43447b48 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) Hi All I wonder if someone can explain to me how to feed an MSK signal into a typical Class D transmitter? I mean by typical that the TX has a 4013 type /2 system feeding two FET drivers to drive FETs in a push-pull configuration. If I understand correctly due to the fact MSK does not have amplitude component to its signal that a non-linear transmitter can be used. So, how do you do this with a Class-D TX as often used in LF/VLF? Thanks, Scott VE7TIL