On Thu, 01 Sep 2005 00:12:57 GMT, "Jim Hampton"
wrote in :


"Frank Gilliland" wrote in message
.. .
On 31 Aug 2005 11:11:52 -0700, "Bob" wrote in
.com:

Saw this morning a brief mention on Fox News about hams doing health
and welfare emergency traffic for New Orleans. "Only reliable
communications in the area". They showed a few ham transcievers, one
displaying a 70cm band frequency, another HF rig on 20 meters in the
phone subband.

This is the sort of disaster that ham radio handles well. Cell phones
are mostly out, as well as most any other comm system that needs
physical infrastructure to function.


I guess that means CB radios aren't working either, huh?




If a large area is devestated, one just might need a couple hundred mile
range 24/7. Even battery powered HTs through a repeater can get you 30 to
100 miles total between users. Hf rigs can supply you continuous coverage
24/7 from local to thousands of miles. You just select an appropriate
frequency (ranges of a few decades in frequency may be involved here).

There may be a lot more cbs, but if you can only get 10 or 20 miles and you
keep receiving skip from other stations far away running power ....


I never knew there was a minimum range for emergency communications.
So how far does a radio wave have to go in order to get this
distinction? A couple hundred miles? More than 10 or 20 miles? Is
there some FCC rule that defines this distance?








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