Yaesu Amplifier keying relay 8 pin mini DIN FTX-1 Optima FT-710 857 891 FT-991
Our amplifier isolation relay is powered from the radio and requires NO external power connections. Plugs directly into Yaesu transceiver with the 8 Pin Mini DIN port. The port on the radio is often labeled TUNER, TUN/LIN, CAT/LINEAR or ACC.