[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

RE: rotator



> but I am using an Alliance on its side for elevation.  

At the risk of repeating myself, (for any newcomers),
remember that you do not need an elevation rotator 
for any LEO satellite, and there are currently no AMSATs
that are not LEO.

All LEO's are below 20 deg 67% of the time
All LEO's are below 40 deg 90% of the time but 4 dB closer when above
All LEO's are below 60 deg 98% of the time but 8 dB closer when above

Thus a small 10dBi gain antenna pointed up about 10 deg will give
you almost a CONSTANT gain from THe horizon to OVERHEAD.
And all existing LEO's can be heard easily with that 10 dB.  THus
no need for elevation at all.  It only adds complexity, frustration
and more to go wrong.

de WB4APR, Bob
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home