Comment by simondanerd | Hacker News Reader

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Comment by simondanerd | Hacker News Reader

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Also check out rtty and FT8/FT4 for those interested in other "digital over analog" modes.

Bell 202 lives on as well: https://www.windytan.com/2014/02/mystery-signal-from-helicop...

In this case, continuous GPS coordinates are sent on one audio channel while the other channel is voice.

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