[aprssig] 6 meter APRS

[Matti Aarnio]

On Wed, Aug 26, 2009 at 09:15:18AM -0700, Curt, WE7U wrote:
> On Wed, 26 Aug 2009, Earl Needham wrote:
>> However, I'm daydreaming of putting it on CW -- that would be
>> legal on ANY amateur frequency (except 60 meters). At some point
>> this could be a real advantage. I no longer program but I bet it
>> would be straightforward to write software for CW instead of
>> AX.25.
....
> You'd also need software to convert the received CW back into an
> APRS type of posit, perhaps injecting it into the APRS-IS.
>
> So...  How long in ms would it take to send a CW posit at 30 or
> 40wpm in Base-91 format?  50wpm?

90 wpm  Base-36  (A thru Z, 0 thru 9, no mixed cases, no punctuation)

Really there are a lot better packet oriented modulation schemes, than CW.
See KA9Q.   You need "just" an SSB transmitter and receiver (and a few MIPS
of Viterbi processing.)

> -- 
> Curt, WE7U.                         <http://www.eskimo.com/~archer>
>    APRS:  Where it's at!                    <http://www.xastir.org>

73 de Matti, OH2MQK