I've noticed quite a bit of 39 Tone Modem activity on HF, especially on the USAF HF ALE Network, but quite a few others on 10-11 MHz.
I assume this is being used for HF Email... however, does anyone know if there are any decoders available to decode this traffic? Is most of it encrypted? Is any of it non encrypted and recoverable?
I assume this is being used for HF Email... however, does anyone know if there are any decoders available to decode this traffic? Is most of it encrypted? Is any of it non encrypted and recoverable?
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