Return-Path: Received: (qmail 23076 invoked from network); 7 Sep 2001 01:59:24 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 7 Sep 2001 01:59:24 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 10508 invoked from network); 7 Sep 2001 01:57:33 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 7 Sep 2001 01:57:33 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15fAlL-0001xx-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Sep 2001 02:48:55 +0100 Received: from imo-d08.mx.aol.com ([205.188.157.40]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15fAlK-0001xs-00 for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2001 02:48:54 +0100 Received: from BROCKRADIO@aol.com by imo-d08.mx.aol.com (mail_out_v31_r1.4.) id 7.142.12f1796 (4159); Thu, 6 Sep 2001 21:47:02 -0400 (EDT) From: BROCKRADIO@aol.com Message-ID: <142.12f1796.28c98115@aol.com> Date: Thu, 6 Sep 2001 21:47:01 EDT Subject: LF: Re: [AmFmTvDx] Long Wave Broadcasting To: donnatom@netins.net, lowfer@qth.net, rsgb_lf_group@blacksheep.org, amfmtvdx@qth.net MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 5.0 for Windows sub 138 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 9/5/2001 9:53:09 PM Eastern Daylight Time, donnatom@netins.net writes: << This my seem a silly question, but I am curious. How is the audio quality of European LW BC stations? The bandwidth percentage is really something on those frequencies. (Most sound very good even in their secondary coverage area. The Far East Russian stations are often muddy and lack high end, but I think this is due to poor network lines. You are right, large surface size on the radiators help improve the bandwith , but base tuning is sharp. Look at what a large percentage just a sideband swing of a 8 Khz audio is, when your zero carrier freq. is just 153 Khz! -bw) Do they have special audio processing techniques? Are they rather "narrow" for broadcasting? (Almost all LW and MW stations in Europe run a limit of 90% modulation by mutual agreement to limit adjacent channel splatter. Remember, 9 Khz spacing used, sometimes less in the case of Europe 1 and Konigswusterhausen on longwave-bw) What type of antennae do the LW stations use? (Most run verticals. A famous 1/4 wave longwave tower in Poland came crashing down a number of years ago. Most impressive are the multi-tower directional 1/4 wave arrays used by France on 162 and others-bw) Just curious and very interested! (Hope that helps. Brock WH6SZ/4 Atlanta) Doc. >>