[Laser] NO RX XE2AT

[laser@mailman.qth.net]

In a message dated 2/10/04 2:11:28 PM GMT Standard Time, xe2at@hotmail.com 
writes:

> Hi boys yesterday we make some test at 20 miles and after 2 hours we can 
> saw 
> the both sides of lasers !! was a great experience but NO reception !!!! I 
> can see a lot of city lights but no noise beaming the receiver to lights, I 
> am using a 4 inches lens and the Ramsey Electronic Kit.
> The Laser was very strong but I think is the LED on the receiver, What I can 
> 
> do ?
> 73 de Al
> XE2AT
> 
> 

If you can see the lasers then the problem is an insensitive receiver or 
inability to point the RX in the right direction. With 2 hours of effort you were 
probably looking in the right place, so my guess is the RX.

To simulate the long distances I aim my laser at a white surface about 400m 
away. The return signal I get from that is about the same level as a signal 
travelling 25km in free space.  Over 2miles was the laser the brightest object on 
the horizon? or could your receiver have saturated with other brighter 
sources?

73

David  G0MRF               www.g0mrf.freeserve.co.uk/laser.htm


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