Return-Path: Received: (qmail 4153 invoked from network); 14 Jul 2003 18:34:21 -0000 Received: from netmail02.services.quay.plus.net (212.159.14.221) by mailstore with SMTP; 14 Jul 2003 18:34:21 -0000 Received: (qmail 3647 invoked by uid 10001); 14 Jul 2003 18:34:21 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail02.services.quay.plus.net with SMTP; 14 Jul 2003 18:34:20 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19c88v-00052Y-Py for rsgb_lf_group-outgoing@blacksheep.org; Mon, 14 Jul 2003 19:33:45 +0100 Received: from [62.253.164.48] (helo=mta8-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 19c88r-00052P-S4 for rsgb_lf_group@blacksheep.org; Mon, 14 Jul 2003 19:33:41 +0100 Received: from l8p8y6 ([62.252.228.49]) by mta8-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20030714183340.OJGP291.mta8-svc.business.ntl.com@l8p8y6> for ; Mon, 14 Jul 2003 19:33:40 +0100 Message-ID: <002c01c34a2e$0060c9c0$31e4fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org References: <19biRV-09Lw920@fwd11.sul.t-online.com> Date: Mon, 14 Jul 2003 18:16:30 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: ICOM 746 cure Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-1.5 required=5.0tests=ORIGINAL_MESSAGE,QUOTED_EMAIL_TEXT,REFERENCESversion=2.55 X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false ----- Original Message ----- From: ""Heinz Bordé"" To: Sent: Sunday, July 13, 2003 4:07 PM Subject: Re: LF: ICOM 746 cure I tryed the proposal of Mal. It works. The carrier could be moved to abt. 140 kHz. See INSTRUCTION MANUAL IC 746, chapter 11-4 (ADJUSTMENTS-ADJUSTING the LCD), bringing down LCD BACKLIGHT to 10% By the way: the 746 is not that bad at 137 kHz: I could copy a G4 stn calling cq without preamp. Ant is a T - one, 8 m vertical and 20 m tpo load. Hi Heinz. I have a 746 and it compares with the TS 850 as regards sensitivity and with a CW filter fitted it is very good on 137 k hz. You can also use the APF to advantage. After the above adjustments to remove the inband carrier qrm on 137 khz this makes a great RX for LF. Glad you had success. 73 de Mal/G3KEV - the STATION FOR INFORMATION AND EDUCATION 73 to all, Heinz, DM2BHG "hamilton mal" schrieb: > Heinz/DM2BHG recently enquired about a cure for the inband carrier around 136 khz on his ICOM 746 > > To eliminate this carrier adjust the DISPLAY CONTRAST CTL to around 10% and BACKLIGHT CTL the same 10%. > This will move the offending carrier up HF to about 143 khz. This operation takes a couple of minutes > The IC 746 is a good sensitive LF RX on the 137 khz band with the appropriate CW FILTER installed. > 73 and gl > de Mal/G3KEV > > >