Back when I had a FT-dx1200 I made my cable to connect the rig to my
AT-600Pro tuner and if the other Yaesu rigs are the same (check your
manual) then you can replicate what I did.
The PDF of my "LDG AT-600Pro AutoTuner to FT-dx1200 adapter cable
project.pdf" which is the solution I used is still available in the
Files folder of the groups.io/g/FTdx-1200.
If anyone needs a copy they can go there to download it or contact
me
off list and I will email it to you.?? I have already
sent it to Jeff.
73,
Ed - ad7gr