K3S and SM1000 FreeDV Adapter

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K3S and SM1000 FreeDV Adapter

I have a SM1000 FreeDV encoder.

In my first attempt to connect it, before levels could be adjusted in either transmit or receive, I got an PTT error message.

My initial attempt resulted in a PTT error.

Also had some hum, I tried two different wall wort's, both of which were old school linear supplies. but have to figure out the PTT before it matters :>)

Has anyone had any success using this?