Return-Path: Received: from mtain-mb04.r1000.mx.aol.com (mtain-mb04.r1000.mx.aol.com [172.29.96.24]) by air-di01.mail.aol.com (v129.4) with ESMTP id MAILINDI012-eab74bec77012f3; Thu, 13 May 2010 18:02:41 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mb04.r1000.mx.aol.com (Internet Inbound) with ESMTP id B0D863800008A; Thu, 13 May 2010 18:02:39 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OCgTI-00044Q-Og for rs_out_1@blacksheep.org; Thu, 13 May 2010 23:01:36 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OCgTI-00044H-CW for rsgb_lf_group@blacksheep.org; Thu, 13 May 2010 23:01:36 +0100 Received: from elvis.franken.de ([193.175.24.41] ident=[Bu3FaBP3pdYvMPH+n/h/6rngPruu15Xi]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OCgTE-00005k-PI for rsgb_lf_group@blacksheep.org; Thu, 13 May 2010 23:01:35 +0100 Received: from uucp by elvis.franken.de with local-rmail (Exim 3.36 #1) id 1OCgTC-000331-00 for rsgb_lf_group@blacksheep.org; Fri, 14 May 2010 00:01:30 +0200 Received: from [192.168.1.12] (uhrenpc [192.168.1.12]) by mbsks.zwiebeltuete.com (Postfix) with ESMTP id D91BD448072 for ; Thu, 13 May 2010 23:55:00 +0200 (CEST) Message-ID: <4BEC7524.3050908@mbsks.franken.de> Date: Thu, 13 May 2010 23:54:44 +0200 From: Roland Bruestle User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.7) Gecko/20100111 Thunderbird/3.0.1 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <001301caf2cc$4f8273c0$0401a8c0@xphd97xgq27nyf> In-Reply-To: <001301caf2cc$4f8273c0$0401a8c0@xphd97xgq27nyf> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Dreamers with an audio amplifier on 9 kHz Content-Type: multipart/alternative; boundary="------------080902090305040202040506" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE 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: 3039ac1d60184bec76ff3ee8 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --------------080902090305040202040506 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Yes, it works very well. It is used by Walter DJ2LF, Markus DF6NM and Roland DL3NDR. For antenna current of 300mA and PA power of 200W you will have to transform to about 400V. At the beginning I used a stereo amplifier with 80W. A good way is when you use a car amplifire. 73 Roland DL3NDR Am 13.05.2010 20:44, schrieb mal hamilton: > Has anyone tried driving an audio amplifier on 9 kHz and using a > matching transformer to step up the normal 4 ohms to 50 ohms, if so > what results. > de mal/g3kev --------------080902090305040202040506 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Yes, it works very well.
It is used by Walter DJ2LF, Markus DF6NM and Roland DL3NDR. For antenna current of 300mA and PA power of 200W you will have to transform to about 400V.
At the beginning I used a stereo amplifier with 80W. A good way is when you use a car amplifire.

73 Roland DL3NDR

Am 13.05.2010 20:44, schrieb mal hamilton:

Has anyone tried driving an audio amplifier on 9 kHz and using a matching transformer to step up the normal 4 ohms to 50 ohms, if so what results.

de mal/g3kev

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