Return-Path: Received: (qmail 9734 invoked from network); 7 Jan 2000 08:56:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by teachers.core.plus.net.uk with SMTP; 7 Jan 2000 08:56:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 126V5U-0004lW-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Jan 2000 08:49:36 +0000 Received: from tele-post-20.mail.demon.net ([194.217.242.20]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 126V5T-0004lR-00 for rsgb_lf_group@blacksheep.org; Fri, 07 Jan 2000 08:49:36 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from alg.demon.co.uk ([194.222.171.80]) by tele-post-20.mail.demon.net with esmtp (Exim 2.12 #2) id 126V5N-00084x-0K; Fri, 7 Jan 2000 08:49:30 +0000 Message-ID: <3875A896.664A4720@alg.demon.co.uk> Date: Fri, 07 Jan 2000 08:49:27 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Steve Rawlings" X-Mailer: Mozilla 4.04 [en] (Win95; I) MIME-Version: 1.0 To: "LF Group" , "Steve Baugh" <100042.134@compuserve.com> Subject: LF: Update from GW4ALG Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: The recent high winds and heavy rain (plus visits to/from friends & family over the holiday period) resulted in low activity from GW4ALG over the past month. So I have particularly enjoyed my QSOs this week with G3YMC; ON7YD; G8PX; and G4GVC. (The red sky this morning probably means more rain today . . . .) In an earlier posting, I reported my success with a noise canceller, based on a design by VK5BR. At that time, I mentioned how I intended to build a pair of automatically switched cancellers so that the correct phase/amplitude settings could be set for each of my two receive antennas. I have now completed this particular project and am delighted with the results. The degree of attenuation of local electrical noise has to be heard to be believed - wonderful! Details of the switched canceller can be found at: http://www.alg.demon.co.uk/radio/136/noise_can.htm My next project will be construction of the PA0LQ audio CW filter (op-amp version), which had been put on hold due to the urgent need to solve the electrical noise problem. Regards to all, Steve GW4ALG