Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 8FC1D38000142; Mon, 10 Oct 2011 09:20:20 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RDFkd-0004Ru-M5 for rs_out_1@blacksheep.org; Mon, 10 Oct 2011 14:18:39 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RDFkd-0004Rl-5q for rsgb_lf_group@blacksheep.org; Mon, 10 Oct 2011 14:18:39 +0100 Received: from out1.ip06ir2.opaltelecom.net ([62.24.128.242]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RDFka-0001Uk-VF for rsgb_lf_group@blacksheep.org; Mon, 10 Oct 2011 14:18:39 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AlkDABvwkk5cF/+Y/2dsb2JhbABDiTCPNAEJQ45mgQaBTgUBAQMBAQgBAQNJAg8XBgEBAwUCAQMRBAEBCiUUAQQaBhYIBhMKAQICAQGHbQIFuByHQwSOVwGWcQ X-IronPort-AV: E=Sophos;i="4.68,517,1312153200"; d="scan'208";a="514948928" Received: from host-92-23-255-152.as13285.net (HELO xphd97xgq27nyf) ([92.23.255.152]) by out1.ip06ir2.opaltelecom.net with SMTP; 10 Oct 2011 14:18:30 +0100 Message-ID: <003f01cc874f$176bd210$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <4E9083DB.5090603@iup.uni-heidelberg.de> <4E909FCE.7060302@telus.net> <4E90A3F1.8080004@iup.uni-heidelberg.de> <4E92806A.5020106@telia.com> Date: Mon, 10 Oct 2011 13:18:24 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Laser link... Content-Type: text/plain; charset="ISO-8859-15" 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=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: 0:2:501002752:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d4ad14e92f1142a87 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Stefan es Friends If you need all these add on gadgets for LF es MF ie lazers, fm repeaters, carrier pigeons then the Cause is Lost. Concentrate instead on proper LF Antennas, Sensitive receivers and plenty of RF, this way and you will achieve the object!! g3kev ----- Original Message ----- From: "Johan H. Bodin" To: Sent: Monday, October 10, 2011 5:19 AM Subject: Re: LF: Laser link... > Hi Stefan, > > Clint Turner http://ka7oei.com/ has interesting information on his "optical > communications page" http://modulatedlight.org/optical_comms/optical_index.html. > Linear's design note DN399 about photodiode amplifiers may also be worth reading > http://cds.linear.com/docs/Design%20Note/dn399f.pdf (it uses a BF862 FET which I > think is already one of your favourites). > > Oops... 650nm wavelength is perhaps O.T. on this reflector. > > 73 > Johan SM6LKM > >