Message-ID: <4E92CAA5.8010202@iup.uni-heidelberg.de>
Date: Mon, 10 Oct 2011 12:36:21 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org
References: <4E9083DB.5090603@iup.uni-heidelberg.de>	<4E909FCE.7060302@telus.net>	<4E90A3F1.8080004@iup.uni-heidelberg.de>	<4E92806A.5020106@telia.com> <CAA8k23TSM69Dd_vEm5=r_0v-OC5=3P_d4tGe2WD81htesyEyOQ@mail.gmail.com>
In-Reply-To: <CAA8k23TSM69Dd_vEm5=r_0v-OC5=3P_d4tGe2WD81htesyEyOQ@mail.gmail.com>
Subject: Re: LF: Laser link...
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Andy, Johan, Wolf, Scott, Dex, all,

Thanks for the useful links and suggestions. I'm looking forward to some 
tests and really would like to set up a link to a RX antenna for 137 in 
the forest!. Will try the 74HC4046 + a laser diode. In 2001 i already 
did some experiments on that and have a laser diode parallel fixed on a 
sighting telescope.

73, Stefan/DK7FC

Am 10.10.2011 09:32, schrieb Andy Talbot:
> And there is http://www.g4jnt.com/OpticalComms/OpticalComms.htm
> Andy
> 'jnt
>
>
> On 10 October 2011 06:19, Johan H. Bodin <jh.bodin@telia.com 
> <mailto:jh.bodin@telia.com>> wrote:
>
>     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
>
>
>

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Andy, Johan, Wolf, Scott, Dex, all, <br>
<br>
Thanks for the useful links and suggestions. I'm looking forward to
some tests and really would like to set up a link to a RX antenna for
137 in the forest!. Will try the 74HC4046 + a laser diode. In 2001 i
already did some experiments on that and have a laser diode parallel
fixed on a sighting telescope.<br>
<br>
73, Stefan/DK7FC<br>
<br>
Am 10.10.2011 09:32, schrieb Andy Talbot:
<blockquote
 cite="mid:CAA8k23TSM69Dd_vEm5=r_0v-OC5=3P_d4tGe2WD81htesyEyOQ@mail.gmail.com"
 type="cite">
  <div>And there is <a moz-do-not-send="true"
 href="http://www.g4jnt.com/OpticalComms/OpticalComms.htm">http://www.g4jnt.com/OpticalComms/OpticalComms.htm</a></div>
  <div>&nbsp;</div>
  <div>Andy</div>
  <div>'jnt</div>
  <div>&nbsp;</div>
  <div><br>
  <br>
&nbsp;</div>
  <div class="gmail_quote">On 10 October 2011 06:19, Johan H. Bodin <span
 dir="ltr">&lt;<a moz-do-not-send="true"
 href="mailto:jh.bodin@telia.com">jh.bodin@telia.com</a>&gt;</span>
wrote:<br>
  <blockquote
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"
 class="gmail_quote">Hi Stefan,<br>
    <br>
Clint Turner <a moz-do-not-send="true" href="http://ka7oei.com/"
 target="_blank">http://ka7oei.com/</a> has interesting information on
his "optical<br>
communications page" <a moz-do-not-send="true"
 href="http://modulatedlight.org/optical_comms/optical_index.html"
 target="_blank">http://modulatedlight.org/optical_comms/optical_index.html</a>.<br>
Linear's design note DN399 about photodiode amplifiers may also be
worth reading<br>
    <a moz-do-not-send="true"
 href="http://cds.linear.com/docs/Design%20Note/dn399f.pdf"
 target="_blank">http://cds.linear.com/docs/Design%20Note/dn399f.pdf</a>
(it uses a BF862 FET which I<br>
think is already one of your favourites).<br>
    <br>
Oops... 650nm wavelength is perhaps O.T. on this reflector.<br>
    <br>
73<br>
Johan SM6LKM<br>
    <br>
    <br>
  </blockquote>
  </div>
  <br>
</blockquote>
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