Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp04.r1000.mx.aol.com (Internet Inbound) with ESMTP id C62A538000107; Sat, 8 Oct 2011 15:28:15 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RCcYQ-000168-HJ for rs_out_1@blacksheep.org; Sat, 08 Oct 2011 20:27:26 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RCcYQ-00015z-2t for rsgb_lf_group@blacksheep.org; Sat, 08 Oct 2011 20:27:26 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RCcYO-0003vr-RM for rsgb_lf_group@blacksheep.org; Sat, 08 Oct 2011 20:27:26 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p98JROH2025568 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 8 Oct 2011 21:27:24 +0200 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id p98JROVG009477 for ; Sat, 8 Oct 2011 21:27:24 +0200 Message-ID: <4E90A3F1.8080004@iup.uni-heidelberg.de> Date: Sat, 08 Oct 2011 21:26:41 +0200 From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4E9083DB.5090603@iup.uni-heidelberg.de> <4E909FCE.7060302@telus.net> In-Reply-To: <4E909FCE.7060302@telus.net> X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id p98JROH2025568 X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Laser link... Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: quoted-printable 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-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:486346976:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1dc1484e90a44f12ee X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Thanks Dex and Scott, Enough stuff to study now. The seconds page seems more useful for me. Ok about that OT. 73, Stefan Am 08.10.2011 21:09, schrieb Scott Tilley: > Hi Stefan > > http://www.k3pgp.org/laser.htm > > I use his detector and modulator circuits for my system. > > 73 Scott > > > > > On 10/8/2011 10:09 AM, Stefan Sch=E4fer wrote: >> LF, >> >> Just thought about trying a LF RX in the forest and feed the signal=20 >> via a laser link to the building here. There is a good direct view to=20 >> several suitable places, a good 1000m distant from the city. A simple=20 >> laser diode, driven at 15 to 20 mA should work fine for some hours=20 >> when having a solar panel that charges during the day. You know these=20 >> small lamps for the garden with a solar panel, switching on=20 >> automatically when it gets dark... >> Just seen HA6PC at OE3GHB-grabber but nothing here or at DF6NM (yes=20 >> Mal, i know, you've all worked them in the past...). >> Pure AM is probably not the best choice, rather FM. >> Does someone of you has useful experiance of such a laser system or=20 >> even a ready to use circuit or some hints about a compact IC that=20 >> does the job? >> >> No warnings about the danger of laser light please. >> >> 73, Stefan/DK7FC >> >> PS: Sri for beeing a bit OT >> >> >