From: Jonathan NAYLOR (dfgf@rncb.ac.uk)
Date: Tue Jan 22 2002 - 16:20:37 EET
Hello Robin
The frequency lists are out of date, the uplinks are on 70cms and 23cms,
and the downlinks are on 2.4GHz and 24GHz. Before you get upset about
the 2.4GHz, remember for an aerial you can use an old TV dish (>= 60cms)
and for the feed a helix made of a few turns of wire. The downconverter
can either be ready built or bought as a kit from the RSGB microwave
components service. If you just want to throw money around then you can
buy a ready made dish and feed (60cms dish) from G3RUH and a
downconverter from DB6NT (0.6dB NF). The uplink on 70cms is typically
20W to a 13ele.
Now for the bit I don't know about, I don't operate RUDAK myself. I use
the SSB/CW end of things and have a great time with a system that fits on
a balcony and is easily /P. I have heard RUDAK and the signal is strong,
a standard G3RUH modem would easily do the job. The frequencies quoted
on the sites are probably accurate, bearing in mind that the 2m, and
other transmitters and receivers are not active/blown to pieces.
I am sure if you spend some time looking on the AMSAT sites you'll find
some data on RUDAK, I recommend the AMSAT-DL sites as they are
technically better than the US ones. I think it is www.amsat-dl.org but
don't quote me on that.
From the SSB/CW point of view, it is a very easy satellite to work, the
antennas need to be moved once in a blue moon, and the doppler is almost
non-existent. QRM on 2.4 GHz tends to be low, especially compared to a
2m downlink. Its fun !
Jonathan HB9DRD/G4KLX
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