[amsat-bb] AO-51 L band requirements

Bob- W7LRD w7lrd at comcast.net
Tue Apr 27 11:40:47 PDT 2010

Reading the AO-51 book by Gould where he discuses the L band requirements.  For occasional contact 150 W EIRP is needed.  For superior performance 1 Kw EIRP needed.  Assuming I start out with 10W to a 16 turn helix 40 feet away.  Guesstimating- 5-8 W at the antenna, helix gain 8-12db.  Guestimated EIRP about 40W (worst case).  Am I figuring this correct?  If so then AO-51 is performing better than what the book says.  I am trying to "fine tune" what I have. 

Thanks 73 Bob W7LRD 


More information about the AMSAT-BB mailing list