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[195.171.43.25]) by mx.google.com with ESMTP id bz9si4051851wib.68.1969.12.31.16.00.00; Mon, 19 Aug 2013 03:49:18 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VBMYO-0004eb-9H for rs_out_1@blacksheep.org; Mon, 19 Aug 2013 11:19:16 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VBMYN-0004eS-SN for rsgb_lf_group@blacksheep.org; Mon, 19 Aug 2013 11:19:15 +0100 Received: from rhcavuit01.kulnet.kuleuven.be ([134.58.240.129] helo=cavuit01.kulnet.kuleuven.be) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1VBMYM-000807-D0 for rsgb_lf_group@blacksheep.org; Mon, 19 Aug 2013 11:19:14 +0100 X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-KULeuven-Scanned: Found to be clean X-KULeuven-ID: 3EA0C1380A3.ADED0 X-KULeuven-Information: Katholieke Universiteit Leuven Received: from icts-p-smtps-2.cc.kuleuven.be (icts-p-smtps-2e.kulnet.kuleuven.be [134.58.240.34]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id 3EA0C1380A3 for ; Mon, 19 Aug 2013 12:19:10 +0200 (CEST) Received: from ICTS-S-HUB3.luna.kuleuven.be (icts-s-hub3.luna.kuleuven.be [10.112.9.17]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by icts-p-smtps-2.cc.kuleuven.be (Postfix) with ESMTPS id 6BD4D20041 for ; Mon, 19 Aug 2013 12:19:05 +0200 (CEST) Received: from ICTS-S-MBX5.luna.kuleuven.be ([fe80::312b:f3bc:9c4:4ebb]) by ICTS-S-HUB3.luna.kuleuven.be ([fe80::a470:76b3:406d:2b1a%27]) with mapi id 14.02.0328.009; Mon, 19 Aug 2013 12:19:05 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: QRM on 472.5kHz Thread-Index: AQHOnA0ZZ2jPE6KMLE6pOYccNzRmvpmbRZ2AgAEMDqY= Date: Mon, 19 Aug 2013 10:19:04 +0000 Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A0FC20D60@ICTS-S-MBX5.luna.kuleuven.be> References: <520F60AF.2000004@iup.uni-heidelberg.de> <0127125B54F94B748D9AC87A4A813300@Clemens0811> <5210BB04.9000401@iup.uni-heidelberg.de>,<43CE531FA581432E99864AD4EC53B50D@Clemens0811> In-Reply-To: <43CE531FA581432E99864AD4EC53B50D@Clemens0811> Accept-Language: nl-BE, en-US Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.112.13.13] MIME-Version: 1.0 X-HELO-Warning: Remote host 134.58.240.129 (rhcavuit01.kulnet.kuleuven.be) used invalid HELO/EHLO cavuit01.kulnet.kuleuven.be - verification failed X-Spam-Score: -3.5 (---) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: >And they all use true class D PAs. Somehow most of the active CW stations do not have a "clean" >signal and those who have a clean signal are not QRV :-) Hello Stefan, with a class D PA key clicks are an issue when the drive signal is keyed. Soft-keying the PA itself will solve the problem. If you have to key the drive signal I have the inmpression that a current mode class D PA behaves a bit better in regard with key-clicks (compared to voltage mode). [...] Content analysis details: (-3.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [134.58.240.129 listed in list.dnswl.org] -2.8 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: cc2e5baae40f8f7a09b47e6877ef0bfb Subject: RE: LF: QRM on 472.5kHz Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 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=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 Status: O X-Status: X-Keywords: X-UID: 1579 >And they all use true class D PAs. Somehow most of the active CW stations = do not have a "clean" >signal and those who have a clean signal are not QRV :-) Hello Stefan, with a class D PA key clicks are an issue when the drive signal is keyed. S= oft-keying the PA itself will solve the problem. If you have to key the drive signal I have the inmpression that a current m= ode class D PA behaves a bit better in regard with key-clicks (compared to = voltage mode). 73, Rik ON7YD - OR7T=