[OZAPRS] Low cost HF Modem

[Bob Bruninga]

On Wed, 22 Oct 2003, Andrew Rich wrote about HF APRS trackers.

> PSK 31 ?

No, requires order of magnitude better frequency stability, and takes time
to lockon...  Totally impractical in a bursty APRS format.

OK to include posit info in a QSO, but not a standalone tracker burst.
de Wb4APR

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