Return-Path: Received: from mtain-dd04.r1000.mx.aol.com (mtain-dd04.r1000.mx.aol.com [172.29.64.144]) by air-df02.mail.aol.com (v129.4) with ESMTP id MAILINDF023-5ee84c86a252126; Tue, 07 Sep 2010 16:36:34 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dd04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5396E38000083; Tue, 7 Sep 2010 16:36:33 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ot4t2-0002n8-3r for rs_out_1@blacksheep.org; Tue, 07 Sep 2010 21:35:24 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ot4t1-0002mz-NQ for rsgb_lf_group@blacksheep.org; Tue, 07 Sep 2010 21:35:23 +0100 Received: from cavuit02.kulnet.kuleuven.be ([134.58.240.44]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Ot4sx-00016t-4F for rsgb_lf_group@blacksheep.org; Tue, 07 Sep 2010 21:35:24 +0100 Received: from smtps01.kuleuven.be (smtpshost01.kulnet.kuleuven.be [134.58.240.74]) by cavuit02.kulnet.kuleuven.be (Postfix) with ESMTP id C6E0251C004 for ; Tue, 7 Sep 2010 22:35:09 +0200 (CEST) Received: from ICTS-S-HUB-N1.luna.kuleuven.be (icts-s-hub-n1.luna.kuleuven.be [10.112.9.11]) by smtps01.kuleuven.be (Postfix) with ESMTP id ABF3F31E702 for ; Tue, 7 Sep 2010 22:35:09 +0200 (CEST) Received: from ICTS-S-EXC2-CA.luna.kuleuven.be ([10.112.11.13]) by ICTS-S-HUB-N1.luna.kuleuven.be ([10.112.9.11]) with mapi; Tue, 7 Sep 2010 22:35:10 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Date: Tue, 7 Sep 2010 22:33:00 +0200 Thread-Topic: LF: 137.5kHz WSPR Tuesday evening - reports appreciated Thread-Index: ActOxl/G+CiixgWlSyutxHUKSS2kNgABX0v/ Message-ID: References: <4C8686CF.9060100@iup.uni-heidelberg.de> , In-Reply-To: Accept-Language: nl-NL, nl-BE Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: nl-NL, nl-BE MIME-Version: 1.0 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: RE: LF: 137.5kHz WSPR Tuesday evening - reports appreciated Content-Type: multipart/alternative; boundary="_000_BF4A524700075746A6467658DFC7102C63821D3CDFICTSSEXC2CAlu_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_60_70,HTML_FONTCOLOR_BLUE, HTML_MESSAGE,TO_ADDRESS_EQ_REAL 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: 3039ac1d40904c86a25119ab X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --_000_BF4A524700075746A6467658DFC7102C63821D3CDFICTSSEXC2CAlu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable The IRF510 gate voltage is set just below 3V with a resistive pot. The dri= ve is not a square wave though, so I suppose this could be part of the iss= ue? Hello Roger, Try higher gate voltage (> 8V) and square wave input signal. That way you= will switch the FET fast enough. 73, Rik ON7YD - OR7T --_000_BF4A524700075746A6467658DFC7102C63821D3CDFICTSSEXC2CAlu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
The IRF510 gate voltage is set just below= 3V with a resistive pot. The drive is not a square wave though, so I supp= ose this could be part of the issue?
Hello Roger,
 
Try higher gate voltage (> 8V) and square wave input signal. That= way you will switch the FET fast enough.
 
73, Rik  ON7YD - OR7T
 
 
 
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