[amsat-bb] Re: Is there anyway to get a linear transponder on the ISS?

[g0mrf at aol.com]

Hi.

Mode VU suffers from interference at the atellite from illegal use of 
2m for taxis etc.
Mode VU has a higher path loss on UHF from the satellite to ground

Mode A has issues with higher noise levels and the size of antenna 
required on the satellite.

But, I agree mode A would get a lot of interest from people with HF + 
50MHz equipment.
- HF antenna = prototype deorbit system??
or 2 x ferrite rods at 90 degrees on receive

Thanks

David  G0MRF


-----Original Message-----
From: Ing. Pavel Milanes Costa <co7wt at frcuba.co.cu>
To: Bob- W7LRD <w7lrd at comcast.net>
CC: amsat-bb <amsat-bb at amsat.org>
Sent: Thu, 30 May 2013 13:26
Subject: [amsat-bb] Re: Is there anyway to get a linear transponder on 
the ISS?


Yeha...

A V/A transponder on the ISS would be a success... ;-)

I confess: I like V/A (2m/10m) because I do not have UHF radios...

BTW: Why is the U/V the choice of almost any sat launched this days...?

Why not V/U or V/A?

73 de CO7WT

El 30/05/13 00:17, Bob- W7LRD escribió:
> if there were  a "real" ham on the ISS things would be different.
> 73 Bob W7LRD
>
> 
------------------------------------------------------------------------
> *From: *"Ing. Pavel Milanes Costa" <co7wt at frcuba.co.cu>
> *To: *amsat-bb at amsat.org
> *Sent: *Wednesday, May 29, 2013 7:04:23 PM
> *Subject: *[amsat-bb] Re: Is there anyway to get a linear transponder 
on
> the ISS?
>
> There is no provision or equipment for the job on board.
>
> There is a FM repeater in U/V mode, but last time on for it back a 
years
> from now (2008?)
>
> That time I read in some place of the internet that the FM repeater 
was
> a power hungry device onboard, and that's why it was turned off...
>
> They do not want to listen, or no body said to them that just turning
> the TX Power Down will fix this... or kind of...
>
> I think the repeater function involved the Kenwood radio that now has 
a
> malfunction...
>
> so... there is no hope for now...
>
> My 5 cents...
>
> 73 de CO7WT
>
> El 29/05/13 21:03, K5VOU escribió:
>  > Just thinkin'
>  > Tom K5VOU
>  >
>  >
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