Return-Path: Received: from mtain-da05.r1000.mx.aol.com (mtain-da05.r1000.mx.aol.com [172.29.64.77]) by air-mc01.mail.aol.com (v129.4) with ESMTP id MAILINMC012-a8464c46d9c8369; Wed, 21 Jul 2010 07:28:08 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-da05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 0F48338000137; Wed, 21 Jul 2010 07:28:05 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ObXRz-0005y4-Sd for rs_out_1@blacksheep.org; Wed, 21 Jul 2010 12:26:59 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ObXRz-0005xv-Gm for rsgb_lf_group@blacksheep.org; Wed, 21 Jul 2010 12:26:59 +0100 Received: from mta21.charter.net ([216.33.127.81]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1ObXRy-0007Bq-Eq for rsgb_lf_group@blacksheep.org; Wed, 21 Jul 2010 12:26:59 +0100 Received: from imp09 ([10.20.200.9]) by mta21.charter.net (InterMail vM.7.09.02.04 201-2219-117-106-20090629) with ESMTP id <20100721112650.ENEA75.mta21.charter.net@imp09> for ; Wed, 21 Jul 2010 07:26:50 -0400 Received: from [192.168.0.3] ([66.168.113.95]) by imp09 with smtp.charter.net id kbSp1e00923ZM9N05bSqyP; Wed, 21 Jul 2010 07:26:50 -0400 X-Authority-Analysis: v=1.0 c=1 a=G9u7ajXJye4A:10 a=8nJEP1OIZ-IA:10 a=3JgBz9ClAAAA:8 a=oCcaPWc0AAAA:8 a=xUSp4oIcsD23CXaey8EA:9 a=zdNlIUFPASUf9Ti-5GgA:7 a=TOsuEQvj-ruHQ5T2SkIHU71Je7MA:4 a=wPNLvfGTeEIA:10 a=vKR29PMLvEcA:10 Message-ID: <4C46DBA5.3060905@charter.net> Date: Wed, 21 Jul 2010 07:36:05 -0400 From: John Andrews User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.4) Gecko/20100608 Thunderbird/3.1 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <0ac001cb28c3$a7b4d150$7900a8c0@athlon1200> In-Reply-To: <0ac001cb28c3$a7b4d150$7900a8c0@athlon1200> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: audio amps for LF driver service 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=0.0 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-sid: 3039ac1d404d4c46d9c56db5 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) Dave, I had good luck with the LM2876 at 136 and 185 kHz: http://www.w1tag.com/5watt.htm But it's useless at 500 kHz. John, W1TAG On 7/21/2010 6:58 AM, Dave Brown wrote: > I've seen comments here from time to time about various audio power amps > being used for low power tx purposes - any suggestions as to whats a > useful one for 136 up to 500 kHz at the 5 watt level or thereabouts? > > 73 > Dave, ZL3FJ > > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.441 / Virus Database: 271.1.1/3018 - Release Date: 07/20/10 18:36:00 >