[amsat-bb] (no subject)
Tom Clark, K3IO
tom.k3io at gmail.com
Wed Jun 18 19:32:58 PDT 2008
Domenico, I8CVS said
> When OSCAR-10, OSCAR-13 and AO40 where alive and well we all
> were assisted in solving our technical problems by some well know teachers
> and radio scientists every day on this BB like James Miller G3RUH,
> Charles Suckling, G3WDG and Tom Clark W3IWI now K3IO but
> unfortunately they actually desappeared from this BB because they are
> not anymore interested to discuss about the technical level and matters
> actually seen on this BB.
I won't speak for the others, but I am still here, reading all these
discussions. I choose to be very selective in my posting of comments
unless I have something positive to offer.
Regarding these current discussions, I am at a loss to understand why
the amateur community has become so self-centered that they cannot see
that we MUST pursue programs that involve the education of new. young
and enthusiastic amateurs to carry on the hobby in the future. The
frequencies do not BELONG to us, they are merely entrusted to us to do
good deeds for humanity. As far as I am concerned, unless we encourage
projects like the Cubesats, then amateur radio est morte.
I am also dismayed at the "linear vs FM" diatribes that seem to go on
unabated. I was a major player in the decision for AMSAT-NA to pursue
AO-51 because we needed a simple, short-term project to keep the
organization alive. We solicited the contribution of a linear
transponder and no one, none, zip, Nada was offered. NBFM hardware was
available, so it flew. It was disappointing for me to learn that there
was no one in the USA, Canada or Mexico (the "turf" of AMSAT-NA) who
could tackle the building of such a simple piece of RF hardware.
One piece of news on the linear transponder front that I do want to
mention. This past weekend we had a small technical meeting to
understand the status of Suitsat-2 -- like the first Suitsat, this will
involve putting radio equipment on an out-of-warranty Russian ORLON
space suit, stuffing the legs with dirty clothes, and pushing it out of
the hold of the Space Station. The current plans for Suitsat-2 include a
low-powered Software Defined Transponder (SDX) with 70 cm in & 2M out.
The linear transponder passband will be 20-25 kHz wide. Some of you who
were at Dayton may have seen some of the Suitsat/SDX hardware running on
the air. The satellite demo folks (W5IU, N8MH) in the parking lot
demonstrated it working to many folks. The SDX activity is being done
under the auspices of the High Performance SDR (HPSDR) group which has
AMSAT & TAPR sponsorship. An early version of the "Odyssey" SDX can be
seen at http://hpsdr.org/wiki/index.php?title=ODYSSEY. All along, we
have been hoping that we can make a version of the Odyssey SDX be small
enough to fit into a Cubesat.
And so Domenico, despite your statement, I'm still here!
73 de Tom, K3IO (ex W3IWI)
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