Return-Path: Received: (qmail 83000 invoked from network); 7 Jan 2004 15:03:16 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 7 Jan 2004 15:03:16 -0000 Received: (qmail 73018 invoked from network); 7 Jan 2004 15:03:16 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 7 Jan 2004 15:03:12 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim) id 1AeFDE-000IeD-If for dave@picks.force9.co.uk; Wed, 07 Jan 2004 15:03:12 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AeFCt-000171-KV for rs_out@blacksheep.org; Wed, 07 Jan 2004 15:02:51 +0000 Received: from [194.25.134.83] (helo=mailout07.sul.t-online.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AeFCs-00016s-UL for rsgb_lf_group@blacksheep.org; Wed, 07 Jan 2004 15:02:51 +0000 X-Fake-Domain: fwd00.aul.t-online.de Received: from fwd00.aul.t-online.de by mailout07.sul.t-online.com with smtp id 1AeFCs-00021m-05; Wed, 07 Jan 2004 16:02:50 +0100 X-Fake-Domain: (XjmjZoZEZesTaeCWrNwNaiJ4B42mV6dDfNdjXhqK21OLbvv3EN6fss@[62.224.51.142]) Received: from (XjmjZoZEZesTaeCWrNwNaiJ4B42mV6dDfNdjXhqK21OLbvv3EN6fss@[62.224.51.142]) by fwd00.sul.t-online.com with smtp id 1AeFCK-23M7NI0; Wed, 7 Jan 2004 16:02:16 +0100 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <001401c3d487$504b2000$ee9bfea9@oben> X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Date: Wed, 7 Jan 2004 16:02:16 +0100 Message-ID: <1AeFCK-23M7NI0@fwd00.sul.t-online.com> X-Seen: false X-ID: XjmjZoZEZesTaeCWrNwNaiJ4B42mV6dDfNdjXhqK21OLbvv3EN6fss Subject: Re: LF: 300W-TX-G0MRF Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FROM_ENDS_IN_NUMS,FROM_STARTS_WITH_NUMS autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 dj9dw schrieb: > Hello group, > as I can't get in contact with David, G0MRF, I want to spread out my problem > here. > The TX works fine except the outputtransformer T2. There is heavy ringing at > abt 1 MHz. Now I figured, the inductance seems to be abt 300uH from drain to > drain. That shure is far too much. > Could it be that David has changed the toroid - type to one with higher u so > that 10 turns primary has to be reduced? > Your help is very welcom, I am stuck. > > Regards, dj9dw, Peter. Hi Peter, pse see http://www.qsl.net/dj8wx/My%20second%20transmitter.htm if T2 is not pressed p.e. between two ceramic pieces it should be coold by a fan or else it vibrates on subharmonics of the transmitted QRG. btw. how did you find out a "ringing" at abt 1MHz ? best regards Uwe/dj8wx