[Laser] Changes to ARRL VHF contest rules

[Charles Pooley]

Tim:

I see renewed discussion of the contest.  I have been away from the issue for 
some time, and have lost contact with the rules, contest site.  Could you send 
me the site?  I may be interested.  I will be working on long distance laser 
comm:   http://www.microlaunchers.com/7816/L3/laser/laser-link.html

I would be using low power lasers to enter if I did.

    Charles Pooley                  KD6HKU
    ckpooley at sbcglobal.net
    661 824-4095
    http://www.microlaunchers.com/






________________________________
From: Tim Toast <toasty256 at yahoo.com>
To: laser at mailman.qth.net
Sent: Thu, July 22, 2010 6:03:44 PM
Subject: Re: [Laser] Changes to ARRL VHF contest rules


I agree it's a bit too early to be speculating on exactly how the 
rule will be worded. I am happy with LEDs being moved into the 
"coherent" category. When i first read the power limit, i thought 
of the way they usually define maximum power limits with RF - input 
power to the antenna... Which may have changed by now i'm not sure. 
Light is more normally defined by watts per sq cm though, so i would 
say they probably mean 5 milliwatts per sq cm - which is fine. Nothing 
unfair about that.

So, for bare lasers with no large output collimator (beam spreader), 
they would be limited to 5 milliwatts output, which makes sense for 
eye-safety reasons. For other setups that have a collimator, 5 
milliwatts per sq cm max at the output apature would mean up to about 
50 watts of power with one meter sized optics (and still be eye-safe) 
Again, you wont hear any complaints from me about this. So we will 
wait and see what the rule actually says now. 






      
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