Jimmy, do you use your Mic at all? I found that for some reason when I had the sound card connected to the acc. that if I used SSB the Mic level was very low. I'm not sure why, but on my 746 it is. Other than that the 746 is a great digital rig. My first interface was just a pair of isolating transformers, it worked great with the 746. Hope this helps some. Marshall - WA3RIJ