[Moon-net] Moonbounce for Disaster Service?

Pat Barthelow aa6eg at hotmail.com
Tue Oct 31 18:36:54 CST 2006


A group of hams is working with the owners of a 30 meter dish in Jamesburg 
California.  We plan a Moonbounce demo event soon, lighting up the dish 
with, at first, 500 watts of 1296 carrier power, for SSB.  I have observed, 
but not generated a moonbounce contact yet, so as a rookie, I can ask naieve 
questions about EME, perhaps with a fresh, outside of the box approach...
My question is, if we had a full KW at the antenna connector, and, say, a 15 
db gain quad shooting up to the secondary reflector  (cassegrain feed) from 
the base (vertex) of the dish, we would produce a huge EIRP.  The dish by 
virtue of its diameter, has a theoretical gain somewhere around 50db at 
1296.   (Spec'd at 63db at 6.2 ghz.)
With that kind of EIRP, what is the size of a receiving station antenna 
(yagi, Quagi, or Dish)  required to provide a reasonably strong clear SSB 
signal?   (Or, with a digital modulation signal?)  If it is relatively 
modest, then what are the possibilities that EME with this dish in the loop, 
could be useful as a disaster link?  The ground station at the disaster 
site, might be modest enough, economically and physically, and would have no 
time charges, as incurred with satellite links, which would be attractive.

73, DX, de Pat AA6EG aa6eg at hotmail.com;
Skype:  Sparky599





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