[Laser] PIN Diode Suggestion

[laser@mailman.qth.net]

Greetings,
I have had some success with my recent attempts at light communication! 
�Thanks to everyone for the information in the archives. ��It's been very 
helpful. �For a transmitter, I am using a visible red laser pointer switched 
at 800Hz. �I don't know the exact wavelength. �My receiver is a 60mm 
refractor telescope (800mm focal length) with a Radio Shack phototransistor 
as the detector. �I am now looking to improve the detector by changing to a 
PIN diode. �Can anyone give me some specific suggestions for a good PIN diode 
including the part number, manufacturer, and phone number? �I don't know what 
active area I should be looking for. �My reading tells me that the larger the 
better, but if you get to large it would limit the frequency response. �Since 
I am using 800 Hz, I am assuming that I should go as big as I can afford, as 
long as I can still properly focus the light onto it. �Is this correct? 
�Thanks for your help.

Joel N5FIW