Message-ID: <4E909FCE.7060302@telus.net>
Date: Sat, 08 Oct 2011 12:09:02 -0700
From: Scott Tilley <sthed475@telus.net>
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Subject: Re: LF: Laser link...
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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 Schäfer wrote:
> LF,
>
> Just thought about trying a LF RX in the forest and feed the signal 
> via a laser link to the building here. There is a good direct view to 
> several suitable places, a good 1000m distant from the city. A simple 
> laser diode, driven at 15 to 20 mA should work fine for some hours 
> when having a solar panel that charges during the day. You know these 
> small lamps for the garden with a solar panel, switching on 
> automatically when it gets dark...
> Just seen HA6PC at OE3GHB-grabber but nothing here or at DF6NM (yes 
> 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 
> even a ready to use circuit or some hints about a compact IC that does 
> the job?
>
> No warnings about the danger of laser light please.
>
> 73, Stefan/DK7FC
>
> PS: Sri for beeing a bit OT
>
>