[Laser] Coherent Source - back on my soap box

[Tim Toast]

hi James,

To me it looks like the rule is meant for contesting credit only 
and doesn't apply to other activities. 
I propose that "coherent source" (eg laser) in this context be 
interpreted as: "any light source which has a bandwidth of 50nm 
or less". This should include most led's and lasers we are likely
to be using. Light sources with larger than 50nm bandwidth could 
be considered "broadband" and put in some other "contest credit 
category". Since there may be some advantage to using greater 
bandwidths or diversity reception or other redundancy effects, 
i think broadband optical sources should not be outlawed in contests 
completely.
Even without some special interpretation, i think both LEDs and 
Lasers are "coherent enough" though.

-toast