[Laser] 76km QSO

[Jim Moss]

CONGRATS!!!!
Jim
N9JIM/6

--- G0MRF@aol.com wrote:
> Hello Group.
> 
> Well, Autumn / Fall is here and the nights are getting longer.
> 
> Earlier this week Allan G8LSD and I spotted a fog free British evening with 
> good visibility and took advantage.
> 
> We successfully made a CW QSO between Butser hill in the county of Hampshire 
> and Ashdown forest in East Sussex.
> 
> Total distance was 76.1km (apx 47 miles) which extends the current UK record 
> (49.3km)
> 
> Equipment was G8LSD/P:  3mW @ 670nm and 50mm beam expander. OPT211 on RX. 
> G0MRF/P: 10mW  670nm with OPT210 on receive.
> 
> The atmosphere was unusually stable with minimal 'scintillation' .
> Having made the CW QSO (it took over 2 hours to locate each other!) Allan 
> decided to try his 10kHz sampled pulse width modulator. This allowed a cross
> mode 
> QSO using the lasers and then a 30 minute chat in full duplex with the laser 
> in one direction and the 70cm talkback in the other.
> 
> Great fun.
> 
> 73
> 
> David  G0MRF                 
> 
> <A
>
HREF="http://www.g0mrf.freeserve.co.uk/laser.htm">http://www.g0mrf.freeserve.co.uk/laser.htm</A>
> 
> 
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