[Laser] What's the freq?

Mon, 21 Jul 2003 21:51:18 -0400

Gabor,

Congratulations on your first contact.  I made my first laser QSO with 
the Ramsey kits back in the June contest.  Were you using any lenses or 
just the bare phototransistors?  How bright were they at 3km?  I'm sure 
we would like to hear the details of how you aimed it--most of the 
"pros" you mention were in your shoes at one time.  I'm still stuck on a 
tripod here, so I won't be doing anything of great distance yet, even 
though the receiver is capable of it.

Andy

Jim Moss wrote:

>same physics as radio!
>
>wavelength = 300,000,000 / frequency
>since red = 632.8 if HeNe, if diode 630 or 635, or 650 or 670nM
>wavelength = 474 THz
>
>Jim
>N9JIM/6
>
>
>--- VE7DXG <[email protected]> wrote:
>
>>This weekend VE7DDR and myself made our first laser QSO.
>>We were using the cheapo Ramsey Laser Communicator kits over a 3km path.
>>There is lot to improve yet, but it was great to see the "flash" from the
>>darkness when we found each other with the beam.
>>I don't think I describe the setup we were using after seeing some of the
>>pictures the pros took of their setups...
>>Anyway, for my log, what is the frequency of a red laser (same as you have
>>in a pointer pen)? Is it something like 450THz?
>>
>>73,
>>Gabor, VE7DXG
>>
>>
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>
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