That's strange that you can't join the group. The last email I got from that forum was January 11, 2025.
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Were you going to use the KAM + for anything other than packet? With the soundcard interface you could use the UZ7HO soundmodem software and then just use only the single device.
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I don't know if performing a firmware update on the FTM-300 would help or not but I thought I would mention it.
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73
John Denison
KD5YOU
