Return-Path: Received: (qmail 6763 invoked from network); 22 Dec 2001 13:26:07 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 22 Dec 2001 13:26:07 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 13871 invoked from network); 22 Dec 2001 13:26:00 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 22 Dec 2001 13:26:00 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16Hm5Q-00084U-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 22 Dec 2001 13:21:12 +0000 Received: from mailout10.sul.t-online.com ([194.25.134.21]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16Hm5P-00084P-00 for rsgb_lf_group@blacksheep.org; Sat, 22 Dec 2001 13:21:11 +0000 Received: from fwd10.sul.t-online.de by mailout10.sul.t-online.de with smtp id 16Hm4g-00080h-09; Sat, 22 Dec 2001 14:20:26 +0100 Received: from (0482183881-0001@[62.157.30.204]) by fwd10.sul.t-online.com with smtp id 16Hm4Y-0hqCRtC; Sat, 22 Dec 2001 14:20:18 +0100 From: "jannsen" <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <51.15fc9136.294e0dc4@aol.com> Subject: Re: LF: Deutschlandfunk splatter is back X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Date: Sat, 22 Dec 2001 14:20:18 +0100 Message-ID: <16Hm4Y-0hqCRtC@fwd10.sul.t-online.com> X-Sender: 0482183881-0001@t-dialin.net Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: MarkusVester@aol.com schrieb: > Hi group, > > it seems that the old problem of spurious emissions on 153 kHz from Donebach > has returned this morning. At the moment, the annoying wideband-FM swish and > hiss is about 21 dBuV/m, 136km from the TX (25 mW EMRP). It is distributed > over a few kHz, depending on the modulation content, and identified best in > SSB mode. On average, my noise level is raised by 10 ... 15 dB. > > These emission had suddenly increased on June 10th 2001 and were especially > strong on warm summer afternoons. After a couple of phone conversations with > an engineer at the TX site, it became clear that the Dynamic-AM modulation > controller of one of their two 250kW transmitters showed a > temperature-dependent fault. The problem could be solved on August 16th, when > the spurii were reduced to an insignificant level. Until today :-(. > > Again, I would appreciate observations of others in south-west and south > Germany. For comparison, I can send a short .wav file directly to anyone > interested. > > Regards > de Markus, DF6NM (JN59NK) > Hallo Markus, hier in jo43sv (nördlich von Hamburg) ist mir der Deutschlandfunk heute erstmalig ab etwa 1800MEZ mit Splatter (Blecheimermodulation) so richtig unangenehm aufgefallen auf 137kHz. Das selbstgebaute Vorfilter (nach einem Entwurf von DJ2EY gefertigt)ist eingeschaltet. Empfang unter- oder oberhalb des 137kHz-Bandes bei eingeschaltetem Filter gleich null. Hast Du schon mit dem Betriebsing in Donebach gesprochen? lass es mich bitte wissen. vy 73 Uwe/dj8wx