Return-Path: Received: (qmail 24526 invoked from network); 25 May 2000 07:07:20 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by grants.core.plus.net.uk with SMTP; 25 May 2000 07:07:20 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12urbI-0006Gu-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 25 May 2000 07:58:36 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from finch-post-12.mail.demon.net ([194.217.242.41]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12urbH-0006Gp-00 for rsgb_lf_group@blacksheep.org; Thu, 25 May 2000 07:58:35 +0100 Received: from telemetry.demon.co.uk ([194.222.19.114]) by finch-post-12.mail.demon.net with smtp (Exim 2.12 #1) id 12urbD-000GnM-0C for rsgb_lf_group@blacksheep.org; Thu, 25 May 2000 06:58:32 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <1pPv4dASE+K5Mw45@telemetry.demon.co.uk> Date: Wed, 24 May 2000 15:02:58 +0100 To: rsgb_lf_group@blacksheep.org From: "Tom Boucher" Subject: Re: LF: Re: Re: Morse tones / filters etc. In-reply-to: MIME-Version: 1.0 X-Mailer: Turnpike Version 3.03a Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >This is a variation on the well-known technique of diversity >reception - which is what the old AR88D receiver was for (D for >diversity!) - used by commercial HF fixed stations for many years. > > ....and still used in missile and aircraft telemetry systems. 73, Tom G3OLB