Return-Path: Received: from rly-mf01.mx.aol.com (rly-mf01.mail.aol.com [172.20.29.171]) by air-mf06.mail.aol.com (v121_r4.4) with ESMTP id MAILINMF061-93b495d3ce0244; Thu, 01 Jan 2009 17:00:15 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mf01.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMF011-93b495d3ce0244; Thu, 01 Jan 2009 17:00:03 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LIVZX-00072a-AC for rs_out_1@blacksheep.org; Thu, 01 Jan 2009 21:59:19 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LIVZW-00072R-UK for rsgb_lf_group@blacksheep.org; Thu, 01 Jan 2009 21:59:18 +0000 Received: from defout.telus.net ([204.209.205.13]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LIVZT-00052l-VH for rsgb_lf_group@blacksheep.org; Thu, 01 Jan 2009 21:59:18 +0000 Received: from priv-edmwaa04.telusplanet.net ([204.209.205.55]) by priv-edmwes50.telusplanet.net (InterMail vM.7.08.04.00 201-2186-134-20080326) with ESMTP id <20090101215913.VQCT4202.priv-edmwes50.telusplanet.net@priv-edmwaa04.telusplanet.net> for ; Thu, 1 Jan 2009 14:59:13 -0700 Received: from [192.168.1.66] (d75-157-132-237.bchsia.telus.net [75.157.132.237]) by priv-edmwaa04.telusplanet.net (BorderWare Security Platform) with ESMTP id F2EA07273C1258A8 for ; Thu, 1 Jan 2009 14:59:12 -0700 (MST) Message-ID: <495D3CB0.1020100@telus.net> Date: Thu, 01 Jan 2009 13:59:12 -0800 From: Scott Tilley User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: In-Reply-To: X-Karma: 0: X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=disabled,MAILTO_TO_SPAM_ADDR=0.276 Subject: Re: LF: Re: JT65A and narrow modes Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.9 required=5.0 tests=FROM_ENDS_IN_NUMS, MAILTO_TO_SPAM_ADDR 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-Mailer: Unknown (No Version) Hi David and All Although not LF related LASER DXing does share alot of common problems and solutions. Here's a couple of links to some of the developments in the LASER DX area: http://mail.rochester.edu/~af006m/LaserScatter.html http://www.k3pgp.org/laserscatter.htm I have here a 35 laser diode array at 100mW each that will someday become my laser EME rig... A big project but lots of fun :-) Hope you find this interesting. 73 Scott G0MRF@aol.com wrote: > In a message dated 31/12/2008 22:36:57 GMT Standard Time, > sthed475@telus.net writes: > > Hi David > > I've used JT65 to listen to cloud backscatter as well with a small > laser > radar system I built. If only someone else out here had such a > rig :-) > > 73 Scott > > Hi Scott / Gary. > > I have tried JT65 and some early versions of the mHz bandwidth > modulation systems using soundcards and lasers. Unfortunately the > soundcard program, which was presented a couple of years ago at a > microwave update by its US originator, suffered from drift in the > soundcard reference oscillator. > At the time I wondered if the system would work for LF, but given the > problems I encountered with the laser, I didn't try to adapt it. > > Although I do have a 20mW laser TX, I can't try any cloud bounce from > here as my QTH is only 5km from Heathrow airport. > > HNY > > David G0MRF - ( Best 2 way laser DX = 76.8km in good ol' CW)