Return-Path: Received: (qmail 20532 invoked from network); 23 Sep 2001 10:49:03 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 23 Sep 2001 10:49:03 -0000 Received: (qmail 11896 invoked from network); 23 Sep 2001 10:48:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Sep 2001 10:48:47 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15l6gW-0001hY-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 23 Sep 2001 11:40:28 +0100 Received: from mta06-svc.ntlworld.com ([62.253.162.46]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15l6gV-0001hT-00 for rsgb_lf_group@blacksheep.org; Sun, 23 Sep 2001 11:40:27 +0100 Received: from oemcomputer ([213.104.106.94]) by mta06-svc.ntlworld.com (InterMail vM.4.01.03.00 201-229-121) with SMTP id <20010923103943.SIBH268.mta06-svc.ntlworld.com@oemcomputer> for ; Sun, 23 Sep 2001 11:39:43 +0100 Message-ID: <002401c1441c$2c856fc0$5e6a68d5@oemcomputer> From: "mike.dennison" To: rsgb_lf_group@blacksheep.org References: Subject: LF: IC-706 on LF Date: Sun, 23 Sep 2001 11:40:25 +0100 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: > - IC706 ( the 'old' one, no MK2, with 270 Hz filter): > Very deaf on 136kHz, no matter if the preamp is on or off. > Turning the VFO knob OR THE VOLUME CONTROL results > in a hissing sound, which stops after the motion. > Looks like the rig picks up some noise from its own serial interface > between the front panel and the microcontroller ! > Hopefully the IC706 MK2 ( & -G) are better at 136kHz. > At 77kHz, I cannot even hear the DCF time signal transmitter near > Frankfurt... > Wolf DL4YHF. Wolf seems to be unlucky with his IC-706. I have a Mk1 which is a little deaf on 136kHz, but adding a one-transistor pre-amp makes it a very good receiver. I experience no interface noise when using the outside antenna, though a few years ago when I did a lot of 73kHz portable work, I noticed that the front panel display radiated LF for a few centimetres. The synthesiser on the 706 is excellent and during last winter's transatlantic tests it stayed within 0.1Hz for hours at a time, and once it was calibrated with Argo and BBC 198kHz it could be re-set reliably day after day. Mike, G3XDV