Return-Path: Received: (qmail 20531 invoked from network); 19 Jan 2001 14:20:31 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 19 Jan 2001 14:20:31 -0000 Received: (qmail 9673 invoked from network); 19 Jan 2001 14:14:51 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 19 Jan 2001 14:14:51 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14JcBU-0000SO-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 19 Jan 2001 14:06:32 +0000 Received: from [200.231.181.97] (helo=ntweb.globocabo.com.br) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14JcBP-0000SD-00 for rsgb_lf_group@blacksheep.org; Fri, 19 Jan 2001 14:06:28 +0000 Received: from spovdesi1625 (SPOVD-ESI-1625 [5.8.10.82]) by ntweb.globocabo.com.br with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id DHFTDGZS; Fri, 19 Jan 2001 12:02:09 -0300 Message-ID: <011c01c08228$d2f13620$520a0805@globocabo.com.br> From: "PY3CRX PY2PLL" To: rsgb_lf_group@blacksheep.org References: <001701c08199$411d6a00$a328fc3e@p.cleal> Subject: LF: Re: Receiver insensitivity Date: Fri, 19 Jan 2001 13:00:04 -0200 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Peter ... > manufacturing plant about 850m away and an NDB about 900m away. NDB 900m away: once I had a problem - noisefloor rise -when I used to live 4Km away from a 720KHz AM (100KW). All filtered but the PLL noise of such AM station spread above and bellow its frequency. Ok, -70dBc but bellow 100KW ... Other noise floor raiser I had: an Elektrisk Bureau receiver, good piece of equipment (15KHz to 30MHz) but 2 x 1N4007 to protect the pre-amp were place before the input preselector raise noise floor when conected to a beverage antenna. The NDBs/MW are from 6 to 25Km from here. On this case, a low pass filter solve the problem. On the first case ... only a loop to null it. 73 Marcus PY3CRX/PY2PLL S. B. do Campo - GG66rf http://py.qsl.br Active from "DC" to 24GHz