Roger... Er.... Have a quick glance on Tower's site...Tower stock # LXDKP6..or Futaba part no..AEC19...you can usualy buy the little Ferite ring ( bit with all the wires looped through) thingy for about a tenth of that price ......the big thermal seekers use these a lot. They argue that range checking on the ground is one thing....interference A.G.L is another..? Oh ! the channel 7 dial thing nearly cought me out too... cheers,Dave