[aprssig] DTMF on HF?

Robert Bruninga bruninga at usna.edu
Fri Jan 10 12:10:15 EST 2014

Has anyone had any experience with any success at DTMF working on HF for
some rudimentary commands?

I know tuning is critical as well as inter-tone noise must be way down.

Just thought maybe someone has experimented with it.

Bob, WB4aPR
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