I can't comment on the quality of the K3S USB interface, because I don't own one. The decoder built into the K3 is pretty good, often as good or better than the software decoder. When used with a keyboard and P3/SVGA setup, it's pretty good for casual operation, and even for a DX pileup. My neighbor, W6GJB, uses that setup for casual operation and is quite happy with it. He also says that he thinks the decoder built into the KX3 is even better!

There are several advantages though to using software decoders running on a computer attached to the audio stream. The major one is that you can choose decoder settings optimized for distortion produced by different kinds of propagation -- like selective fading, multi-path, and so on. The freeware MMTTY and 2Tone decoders are often used simultaneously to decode the same signal. When one decoder misses characters, the other often copies them fine. Contest logging programs WriteLog and N1MM Logger Plus make it easy to do this. Winwarbler does the same for non-contest operation.

I use N1MM for contest logging and WinWarbler for non-contest operation. Many top RTTY contesters prefer WriteLog for RTTY.

73, Jim K9YC

On Wed,3/8/2017 10:51 AM, Joe Subich, W4TV wrote:

For you experienced RTTY'ers, is the built-in capability considered
on a par with using a separate sound card interface and separate RTTY
PC software,

Not even close!
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