Return-Path: Received: (qmail 8896 invoked from network); 5 Jun 2000 15:03:43 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by grants.core.plus.net.uk with SMTP; 5 Jun 2000 15:03:43 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12yyDf-0008CC-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 05 Jun 2000 15:51:11 +0100 Received: from mserv1b.u-net.net ([195.102.240.137]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12yyDe-0008C7-00 for rsgb_lf_group@blacksheep.org; Mon, 05 Jun 2000 15:51:10 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from rsgb.u-net.com ([195.102.80.225] helo=rsgb.org.uk) by mserv1b.u-net.net with esmtp (Exim 2.10 #63) id 12yyDT-00049o-00 for rsgb_lf_group@blacksheep.org; Mon, 5 Jun 2000 15:51:00 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.4.R) for ; Mon, 05 Jun 2000 15:34:36 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 5 Jun 2000 15:34:33 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: Copying CW X-Mailer: Pegasus Mail for Win32 (v3.11) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail.rsgbhq Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have been playing around with feeding differently derived audio into the two halves of stereo headphones with some interesting results. I will report in detail when the tests are complete. In short, it is certainly possible to improve headphone reception, both in terms of close-in selectivity and resistance to static. One question. How do I make an electronic circuit to delay a broadband audio signal by about one-thousandth of a second, without resorting to DSP? Any genius out there with a simple circuit? And yes I do know about the methods (that were originally used for electric guitar echo) such as connecting the diaphragms of a loudspeaker and a microphone by using a spring, and also the tape recorder method. Mike, G3XDV (IO91VT) http://www.dennison.demon.co.uk/activity.htm