From: Onno Meyer
> 
> Those are the rules. House rules are always an option, but I try to
> avoid them. Much easier to tell someone "default TL9, look at the
> books" ...

You can't really avoid house rules when things are so totally unrelated -- 
typical solar power satellite schemes involve rectennas with a size in 
*kilometers*.

The basic requirement for power transmission is (transmitter size)*(receiver 
size) >= (range)*(wavelength). The reasons for using masers rather than lasers 
have to do with efficiency (microwave transmitter->rectenna can have an 
efficiency of 90+%, modern laser->single-wavelength photocell is under 1%) and 
ability to pass through the atmosphere (clouds won't bother a maser with proper 
wavelength choices). The first is a simple technical limitation, the second is 
not but there are probably shorter wavelengths that would work.
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