[amsat-bb] Re: Technical question AO-51

[Andrew Glasbrenner]

Robin Theunis wrote:
> 1) In V/S mode What is the average output power?
>   
About 1.5 watts.
> 2) What kind of antenna is used on 2.4GHz and 1.3Ghz?
>   
A dual band antenna built by Stan Wood WA4NFY. 
http://n4hy.smugmug.com/AMSAT/AO-51-ECHO/Antennas/
> 3) What is the sensitivity of the 1.3Ghz receiver?
>   
I don't have these numbers at hand, but it's not super. The L receiver 
is actually the same receiver as HF, i.e. an all band, all mode type 
synthesized receiver.
> 4) Some where I reeded that AO-51 has an HF receiver? If it true, for
> what is the purpose?
>   
We initially wanted to try 28MHz/435MHz PSK31, but with the short 
antenna, and extra losses in a last minute hardware change, this mode 
does not work very well.

73, Drew KO4MA
AMSAT-NA VP Operations