Got a fellow ham that has this setup. the tuner is bolted to the side of the 897. He has a 811 amp so he is having a hard time hooking it up. Getting the switching circuit from the radio is a problem as the cable goes into the tuner. I have said the tuner needs to be disconnected as it will be off no use on an 800 watt radio. His hookup is radio tuner amp and I am saying radio amp and a big tuner . Have anyone got the Yaesu 897 hooked to am amp and how have you done it.