I have the Boss Antenna Controller for the Yaeus FT100/D; FT-847;FT-857
and FT-897 radios. It allows these radios to interface with most
motorized antennas (High Sierra, Hi-Q, Tarheel, etc) such that the
radios "think" the antenna is an ATAS-100/1200. View the specs at
www.w4rt.com

Unit sells for $149. I will sell for $75. This is complete with
instructions, cables and interface.