Re: [amsat-bb] Mode J and B on Small Satellites

[Al Lawler <alawler@xxxxxxxxxx>]

To add my $.02 to the discussion:

>Mode B is also in my opinion vastly superior to Mode J for LEO,

  One other consideration in favor of Mode-B is that  AO-40 also has
a 70cm uplink.

  IMHO, the amount of blown Mode-S converters will be directly
proportional to the number of mode-J satellites that are launched... :^)

  Keeping 70cm as the general purpose uplink band for both types
of communications would not only cut back on the number of
"accidents",  but also carries the secondary benifit of allowing folks
to invest ONCE in a high-power general purpose uplink
capability,  freeing up more funds for improving their recieve capabilities
on the various bands.

  It will be far easier to sell "microwave" satellites (and 2m downlink
satellites)
in the future if the only investment is another dish feed and down-converter,
(and a small yagi for a 2m leo downlink) while preserving the 70cm uplink
investment.

 -al
  WB1BQE



Dave Guimont wrote:

> >
> >Mode B is also in my opinion vastly superior to Mode J for LEO, especially
> >FM. I love the LEO SSB analog birds dearly, and am active on all of them,
> >but if schools and such are going to build FM sats, they should be Mode B.
>
> I am of the opinion that except for digital we should never build ANY
> FM satellites.  They seem to have caused more dissension in the ranks
> than all the other hamsats ever built!!
>
> ssb es cw to enable multiple users is the ONLY way to go!!
>
>             73, Dave wb6llo@amsat.org
>                     Disagree: I learn....
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