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Re: RE: Cubesat transponder



Hi David, G0MRF

I can understand that a university is more interested in gravity gradient
boom experimentation and so on but not in transponders to let Hams
communicate each other.

What I cannot understand is why the university of Marburg was interested in
transponders beginning from OSCAR-6 to AO40 and the other university
where interested only to use the ham radio frequency allocation for their
experimentations.

73" de

i8CVS Domenico

----- Original Message -----
From: <G0MRF@aol.com>
To: <luclebla@sorel-tracy.qc.ca>; <amsat-bb@AMSAT.Org>
Sent: Sunday, November 20, 2005 11:08 AM
Subject: [amsat-bb] RE: Cubesat transponder


> Hello Luc / Domenico
>
> I believe your right, it would be easy to build a transponder into a
cubesat
> type package. Problem is, no university is interested in transponders.
> Perhaps one of the national AMSAT organisations could encourage a group of
> students / academics by sponsoring the project.
>
> The general idea has much potential. Gravity gradient boom (also acting as
> antenna) to keep the satellite pointing in the right direction over both
> hemispheres, small patch antennas would fit nicely (2.4 / 5.6G) Although
you  would
> probably need a flip up solar panel to add to the power budget of a 10cm
> cube.
>
> Sighhhhh........So many ideas, so little time.
>
> Regards
>
> David
>
> p.s.  I've seen the on line price list of Cal Poly cubesat parts. I
wonder
> what the launch cost is?
>
>
>
>
>
>
>
>
> In a message dated 20/11/2005 09:38:56 GMT Standard Time,
> luclebla@sorel-tracy.qc.ca writes:
>
> >
> > Congratulation for your job because you demostrates that to
> >  build a transponder and make it to fly in the space can be "EASY"
> >
> > 73" de
> >
> > i8CVS Domenico
> > ----
>
> I don't  know if William is willing to publish his schematic and
construction
> notes but  it will be surely a big push and help for those who are skilled
in
> electronic  EG:
> students and few hams. Should i read here there is no more excuses to
don't
> have a linear transponder in the next cube sats? I copy the beacon
saturday
> and signal is
> excellent i don't know if both transponder are at  the same TX power?
> ----
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----
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