Return-Path: Received: from rly-mf09.mx.aol.com (rly-mf09.mail.aol.com [172.20.29.179]) by air-mf02.mail.aol.com (v121_r2.11) with ESMTP id MAILINMF022-97b48b9130d28; Sat, 30 Aug 2008 05:30:10 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mf09.mx.aol.com (v121_r2.11) with ESMTP id MAILRELAYINMF091-97b48b9130d28; Sat, 30 Aug 2008 05:29:53 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1KZMl7-0000PK-1z for rs_out_1@blacksheep.org; Sat, 30 Aug 2008 10:28:41 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1KZMl5-0000PB-E1 for rsgb_lf_group@blacksheep.org; Sat, 30 Aug 2008 10:28:39 +0100 Received: from sighthound.demon.co.uk ([80.177.174.126]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1KZMl1-0001Cl-Gh for rsgb_lf_group@blacksheep.org; Sat, 30 Aug 2008 10:28:37 +0100 Received: from lurcher.twatt.local (lurcher.twatt.local [192.168.1.4]) by lurcher.twatt.local (Postfix) with ESMTP id C0B3E24A010 for ; Sat, 30 Aug 2008 10:28:54 +0100 (BST) Date: Sat, 30 Aug 2008 10:28:54 +0100 From: John Pumford-Green To: Message-ID: <20080830102854.7bc4f0bb@lurcher.twatt.local> Organization: The Gammy Bird X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.9; i486-pc-linux-gnu) Mime-Version: 1.0 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=disabled,AWL=0.144 Subject: LF: Update on Akraberg 531 Content-Type: text/plain; charset=UTF-8 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=none 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: domain : post.thorcom.com ; SPF_helo = n X-AOL-SCOLL-AUTHENTICATION: domain : sighthound.demon.co.uk ; SPF_822_from = n Hello LF, I had several email exchanges yesterday with the engineers and other staff at Utvarp Foroya, Faroe Telecom and Thomson. They acknowledge a problem and are working to correct it. >From the broadcaster :- =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Thank you very much for drawing our attention to the problems that the new Medium Wave transmitter at Akraberg is causing, and for your detailed and very informative report on the problem.=20 The transmitter is a 50/100kW replacement for the old 200kW transmitter, which went of air some months ago.=20 It is used by Kringvarp Foroya (The Faroese Broadcasting Co.), it is owned by the Faroese Government, and it is maintained by Faroese Telecom.=20 Faroese Telecom is aware of the problem, and is working with the manufacturer, Thomson, to solve the problem.=20 They hope to solve the problem in the coming week.=20 Best regards Carsten M. Arnskov=20 Kringvarp F=C3=B8roya (The Faroese Broadcasting Co.) =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D The lastest news came from a Faroes Telecom engineer:- =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D Hi John Pumford-Green =20 We are trying to solve the problem with the transmitter vendor (Thomson). We have reduced modulation from -3 dB to -6 dB and reduced the output power by 3 dB. We have also moved from a 10 kHz to a 4.7 kHz audio filter. =20 Best regards =20 J=C3=B3han P. Poulsen Faroese Telecom =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D The signal is now much cleaner, but they've had to take drastic steps to do it, leading to very low mod depths (30-40% only!) and a rather muddy sounding signal. I'm amazed that they'll admit to a baseband filter of 10kHz having been used at first. I can still detect faintly a raising of the noise floor down at 500kHz when the modulation is at a relatively high level, the grabber shows this slight effect only when there's a distinct change in program material between silent and "loud", although it seems a bit less obvious this morning so perhaps they've done something else to reduce the out of band noise radiation. Hope this is ON TOPIC enough ;-) Regards, John P-G GM4SLV