I found a SCU-17 in a pile of gear that I picked up recently and I am not completely familiar with what it can do. I also found a Kantronics KPC-3+ but it is much better documented so I was able to easily find that it is a TNC for packet only. THE SCU is not nearly as well documented though so I really can't figure out what it is capable of. I have an FTDX 1200 that it would work with but I'd most likely want to use it with my FT-857D for ARES if it can be used on the needed modes. I know that my Rigblaster Nomic that I've used for PSK-31 can do uther modes, determined by the software used, but I'm not a fan of the Rigblaster. I guess what I'm wondering is, can the SCU be used for FM packet? HF packet? PSK-31? other modes? Does it play well with the FT-857D?