I just bought a FT-847 on ebay, should be a 2003 year model from Berghardt radio repair, 30 day warrantee. I figure I'll try using it on the linear transponder satellites with my arrow antenna without the duplexer. The owner has a good reputation over the years so I feel this is a good decision and if something does go wrong, I hook up the boat and have two reasons to go to South Dakota