Return-Path: <owner-rsgb_lf_group@blacksheep.org> X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u88BCP0c021235 for <sq5bpf@lipkowski.org>; Thu, 8 Sep 2016 13:12:25 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bhxC2-0002TO-Dl for rs_out_1@blacksheep.org; Thu, 08 Sep 2016 12:08:30 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bhxC1-0002TF-Tc for rsgb_lf_group@blacksheep.org; Thu, 08 Sep 2016 12:08:29 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from <selberdenken@posteo.de>) id 1bhxBx-0008RK-F9 for rsgb_lf_group@blacksheep.org; Thu, 08 Sep 2016 12:08:28 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id CAB8120A70 for <rsgb_lf_group@blacksheep.org>; Thu, 8 Sep 2016 13:08:23 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3sVHd32K8mz105s for <rsgb_lf_group@blacksheep.org>; Thu, 8 Sep 2016 13:08:22 +0200 (CEST) Message-ID: <57D146A6.5060305@posteo.de> Date: Thu, 08 Sep 2016 13:08:22 +0200 From: DK7FC <selberdenken@posteo.de> 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: <579355A36AEE9D4FA555C45D556003AB5D7DB989@servigilant.vigilant.local> In-Reply-To: <579355A36AEE9D4FA555C45D556003AB5D7DB989@servigilant.vigilant.local> X-Scan-Signature: b08ad821341ca291e1fd930f7b9292d3 Subject: Re: LF: EA5DOM LF tests Content-Type: multipart/alternative; boundary="------------040801020805030703020609" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8706 This is a multi-part message in MIME format. --------------040801020805030703020609 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Hi Luis, I can agree with the notes / recommendations by Mike and Markus. Am 08.09.2016 11:13, schrieb VIGILANT Luis Fernández: > So, we have: U3S with duble frequency to 74F74 feeding both channels > of 7667 and the pair of IRFZ48N. Do I keep the RC at the mosfet drain ? > All the rest as in the W1YD schematic ? Less primary and secondary > turns in the output transformer noted > http://www.w1vd.com/137-500-500WTX.pdf Yes. Keying the driver instead of the signal generator will improve the performance. At 13.8 V / 50W and AL=5000 i would use about 2x 6 turns. First run the PA only with the primary winding and see if the core becomes warm. The power consumption including the driver should be less than 200 mA. If this works well then you can add the secondary winding, which can be tapped for a Hi/Lo switch of course :-) The IRFZ48N should cut high voltage switching impulses, so the RC network may be obsolete. Just try it. One of them costs 0.59 EUR here :-) 73, Stefan --------------040801020805030703020609 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Hi Luis, <br> <br> I can agree with the notes / recommendations by Mike and Markus.<br> <br> Am 08.09.2016 11:13, schrieb VIGILANT Luis Fernández: <blockquote cite="mid:579355A36AEE9D4FA555C45D556003AB5D7DB989@servigilant.vigilant.local" type="cite"> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <meta name="GENERATOR" content="MSHTML 8.00.6001.23588"> <div dir="ltr" align="left"><span class="768384208-08092016"></span> </div> <div dir="ltr" align="left"><span class="768384208-08092016"><font color="#0000ff" face="Arial" size="2">So, we have: U3S with duble frequency to 74F74 feeding both channels of 7667 and the pair of IRFZ48N. Do I keep the RC at the mosfet drain ?</font></span></div> <div dir="ltr" align="left"><span class="768384208-08092016"><font color="#0000ff" face="Arial" size="2">All the rest as in the W1YD schematic ? Less primary and secondary turns in the output transformer noted</font></span></div> <div dir="ltr" align="left"><span class="768384208-08092016"><font color="#0000ff" face="Arial" size="2"><a moz-do-not-send="true" href="http://www.w1vd.com/137-500-500WTX.pdf">http://www.w1vd.com/137-500-500WTX.pdf</a></font></span></div> </blockquote> <font face="Arial" size="2"><br> Yes. Keying the driver instead of the signal generator will improve the performance.<br> At 13.8 V / 50W and AL=5000 i would use about 2x 6 turns. First run the PA only with the primary winding and see if the core becomes warm. The power consumption including the driver should be less than 200 mA. If this works well then you can add the secondary winding, which can be tapped for a Hi/Lo switch of course :-) <br> The IRFZ48N should cut high voltage switching impulses, so the RC network may be obsolete. Just try it. One of them costs 0.59 EUR here :-)<br> <br> 73, Stefan<br> </font> <blockquote cite="mid:579355A36AEE9D4FA555C45D556003AB5D7DB989@servigilant.vigilant.local" type="cite"> <div dir="ltr" align="left"></div> </blockquote> </body> </html> --------------040801020805030703020609--