My sincere thanks to the gentlemen who replied to me directly! :)

It's a fantastic bunch of guys/gals! :)

I didn't mention that I already have MacDoppler Lite and, if MacDopper for Cocoa will handle doppler, for a linear bird, using a single FT-817ND, I'll give it a shot. I belong to the MacDoppler Yahoo Group but no one seems to give a clear answer exactly "what" MacDoppler will/will not do to a '817 to handle doppler. I'll post another question to that group.

73/72, Joe WB3CFN