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

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