Return-Path: Received: (qmail 26602 invoked from network); 9 Jul 2003 19:12:26 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 9 Jul 2003 19:12:26 -0000 Received: (qmail 21025 invoked from network); 9 Jul 2003 19:12:18 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 9 Jul 2003 19:12:18 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19aKM6-00034T-UP for rsgb_lf_group-outgoing@blacksheep.org; Wed, 09 Jul 2003 20:11:54 +0100 Received: from [62.253.164.47] (helo=mta7-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 19aKM1-00034K-Ax for rsgb_lf_group@blacksheep.org; Wed, 09 Jul 2003 20:11:49 +0100 Received: from l8p8y6 ([62.252.205.179]) by mta7-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20030709191147.NXYM13147.mta7-svc.business.ntl.com@l8p8y6> for ; Wed, 9 Jul 2003 20:11:47 +0100 Message-ID: <001b01c34645$7f5572e0$b3cdfc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org Date: Wed, 9 Jul 2003 19:10:45 +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: LF: ICOM 746 cure Content-Type: text/html; charset=windows-1252 X-Spam-Status: No, hits=1.2 required=5.0tests=HTML_40_50,HTML_MESSAGEversion=2.55 X-Spam-Level: * 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 Content-transfer-encoding: 8bit

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