Return-Path: Received: from rly-mg06.mx.aol.com (rly-mg06.mail.aol.com [172.20.83.112]) by air-mg02.mail.aol.com (v120.9) with ESMTP id MAILINMG024-a19472e7c9d30b; Sun, 04 Nov 2007 21:15:00 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mg06.mx.aol.com (v120.9) with ESMTP id MAILRELAYINMG063-a19472e7c9d30b; Sun, 04 Nov 2007 21:14:55 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1IorTf-0008PS-Fj for rs_out_1@blacksheep.org; Mon, 05 Nov 2007 02:14:11 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1IorTd-0008PJ-Tj for rsgb_lf_group@blacksheep.org; Mon, 05 Nov 2007 02:14:09 +0000 Received: from rel106.mail.aue.yahoo.com ([124.108.96.113]) by relay2.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1IorTY-0007pf-6f for rsgb_lf_group@blacksheep.org; Mon, 05 Nov 2007 02:14:09 +0000 Received: (qmail 63878 invoked by uid 1000); 5 Nov 2007 02:13:40 -0000 Received: from 124.108.96.70 by rel106.mail.aue.yahoo.com with SMTP; Sun, 04 Nov 2007 18:13:40 -0800 Received: (qmail 18247 invoked from network); 5 Nov 2007 02:13:40 -0000 Received: from unknown (HELO sooby.xtra.co.nz) (bjhayes@xtra.co.nz@219.88.52.178 with login) by smtp101.tnz.mail.aue.yahoo.com with SMTP; 5 Nov 2007 02:13:35 -0000 X-YMail-OSG: KWzxJHIVM1lR49DaDfhi2pzPV13S1tNiSXURgBgx5bK37dOFcNrVm76pwVMI86SFSg-- Message-Id: <7.0.1.0.1.20071105130741.019c8570@xtra.co.nz> X-Mailer: QUALCOMM Windows Eudora Version 7.0.1.0 Date: Mon, 05 Nov 2007 14:12:38 +1300 To: rsgb_lf_group@blacksheep.org From: Brenda Hayes In-Reply-To: <017a01c81f14$1bbeb870$6d3e6a58@wgt01> References: <017a01c81f14$1bbeb870$6d3e6a58@wgt01> Mime-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: IC706 & LF/MF transverter Content-Type: text/plain; charset="us-ascii"; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : Hello Gary and LF Group, >There has been mention in the past on the LF group of LF & MF >operators using Icom IC706 as a transverter driver due to its >frequency stability, how many of you out there use the IC706 >this way & is the receive capability good on 136 & 500 KHz ?? I used a IC706 MK2 as a LF signal source for several years [CW only]. The transmitter was operated at 18 odd MHz. with minimum power into a dummy load. This was followed by a couple of 7490's to divide by 100 [final frequency was 181.4 kHz.]. Note that there was no transverting, just simple division. Keying the 706 caused the fan to start and stop with a very minor observable frequency shift on the Argo display. With hindsight, I would leave the transmitter run all the time and key a later stage. I should also mention that I did not have a TCXO installed as they were unavailable by 2000. Overall, I was happy with the end result for transmitting. Receiving was a different story. The receiver was both deaf and full of birdies in the LF area. Some pre-amplification seems to have worked well for other 706 models but I would have only been amplifying the birdies. For receiving I used a basic converter ahead of the 706 [18 Mhz xtal osc.] and tuned on the 18 Mhz. band. This worked well. I have since "opened " up the 706 for general HF transmitting. If I decide to fire up in the 136 kHz area, then I would divide down from 13.6 Mhz. I cannot comment on 500 kHz. receiving performance but a dummy load transmitting test showed about 25 Watts output with a poor waveform which, no doubt, could be readily filtered. 73, Kevin [ZL4MD].