Yaesu FTM400 to KPC3+
YAESU FTM400DR/XDR
The connections you need (TXA, RXA, PTT, and Ground)
I started with the Yaesu CT-167
KANTRONICS
Yaesu to Kantronics wiring
Finished cable
(Set Winlink Express (RMS Express) Xmitl to 256 for 2.75 kHz deviation)