Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 2EC0F380000E5; Thu, 2 Feb 2012 14:23:30 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Rt1in-00008Y-RR for rs_out_1@blacksheep.org; Thu, 02 Feb 2012 18:49:25 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Rt1in-00008P-EX for rsgb_lf_group@blacksheep.org; Thu, 02 Feb 2012 18:49:25 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Rt1il-0006Bp-VY for rsgb_lf_group@blacksheep.org; Thu, 02 Feb 2012 18:49:25 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id q12InNZ4003327 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 2 Feb 2012 19:49:23 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id q12InNjR023919 for ; Thu, 2 Feb 2012 19:49:23 +0100 Message-ID: <4F2ADA95.3060102@iup.uni-heidelberg.de> Date: Thu, 02 Feb 2012 19:48:53 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000001cce062$f75dfad0$e619f070$@broadpark.no> <8CEAED202205706-C78-2162B@webmail-stg-m04.sysops.aol.com> <4F2929BD.4070308@charter.net> <4F2946AE.6040205@iup.uni-heidelberg.de>,<4F2AC269.7090605@iup.uni-heidelberg.de> In-Reply-To: X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: RE: Progress using WOLF on VLF Content-Type: multipart/alternative; boundary="------------000904080204020801080905" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_40_50,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-SCOLL-SCORE: 0:2:443637152:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1dc14a4f2ae2b235e7 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------000904080204020801080905 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Rik, I simply forgot the PA at my parents QTH and don't want to wait a week. Also it is overkill to use it for the LOPT. I think the LOPT will handle up to 100W RF. So i will build a separate PA (this evening) in class D mode (2x IRFZ48N) for a 12...20V design. More power, clear digital drive, no self oscillations but still some sidebands on VLF, which i think is uncritical. 73, Stefan Am 02.02.2012 18:33, schrieb Rik Strobbe: > Hello Stefan, > great experiment. > Why not using the "big" bridge-PA > and keeping bandwidth within reasonable limits by increasing > the transition time (t- option) ? > 73, Rik ON7YD - OR7T > --------------000904080204020801080905 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Rik,

I simply forgot the PA at my parents QTH and don't want to wait a week. Also it is overkill to use it for the LOPT. I think the LOPT will handle up to 100W RF. So i will build a separate PA (this evening) in class D mode (2x IRFZ48N) for a 12...20V design. More power, clear digital drive, no self oscillations but still some sidebands on VLF, which i think is uncritical.

73, Stefan

Am 02.02.2012 18:33, schrieb Rik Strobbe:

Hello Stefan,

great experiment.

Why not using the "big" bridge-PA and keeping bandwidth within reasonable limits by increasing the transition time (t- option) ?

73, Rik ON7YD - OR7T

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