I'm not sure about the other modes, but Pactor (or Pactor 1) seems to be supported by very few HF gateways. Those might be gateways that are still using older versions of Trimode... IDK, but I vaguely remember Pactor 1 was deprecated and no longer supported. VARA would require a soundcard interface and is basically an alternative mode to the faster Pactor 2, 3 and 4 protocols. Yes with VHF FM the two modes that are mostly used are VARA FM and packet, though it seems that packet has been declining in use since VARA FM can provide a much faster data speed on all but the shortest messages. It is possible to use modes like FT8 on VHF but I don't think many people use FT8 in that manner.
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73
John Denison
KD5YOU
