Return-Path: Received: (qmail 23199 invoked from network); 9 Oct 2001 09:34:25 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 9 Oct 2001 09:34:25 -0000 Received: (qmail 1256 invoked from network); 9 Oct 2001 09:33:11 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 9 Oct 2001 09:33:11 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15qt6i-0002Ve-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 09 Oct 2001 10:23:24 +0100 Received: from jazzfm.netcomuk.co.uk ([194.42.248.66]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15qt6f-0002VZ-00 for rsgb_lf_group@blacksheep.org; Tue, 09 Oct 2001 10:23:23 +0100 Received: from jazzfm.com [192.168.102.5] by jazzfm.netcomuk.co.uk [127.0.0.1] with SMTP (MDaemon.v2.8.5.0.R) for ; Tue, 09 Oct 2001 10:22:28 +0100 Received: from JazzFM-Message_Server by jazzfm.com with Novell_GroupWise; Tue, 09 Oct 2001 10:21:28 +0100 Message-ID: X-Mailer: Novell GroupWise 5.2 Date: Tue, 09 Oct 2001 10:21:09 +0100 From: "Martin Charman" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Which effect is this? MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Content-Disposition: inline X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: Martin@jazzfm.com Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I'd always assumed it was simply the receiving aerial being detuned by the bridge. I once retuned my 160m mobile aerial under a similar 'obstruction' and I could hear signals again. Just a thought. Cheers, Martin G4FKK >>> "'Geri' Kinzel, DK8KW" 04 October 2001 18:16:10 >>> Hello LF group, I went to Holland recently, and listened to Deutschlandradio on 153 kHz. I have already noticed years ago that mediumwave and longwave signals are being attenuated or even completely faded out under bridges. Now, listening to that radio transmission not too far away from our 136 kHz band I asked myself some questions: