Gregg
well this is what I am using --
it has an adapter to fit the ft817, and I forget the size of the native connector - check to see if it matches what you use for the ubitx -- I ended up cutting the card to feed a homemade powerpole box (3 pairs).?
I imagine there may be other 3 amp-ish power supplies made for ham radio.? look around an on line ham store, and perhaps cross check other sales sites once you know what you want.? if its a switcher (like this one) make sure it is intended for ham radio - and find an independent review if possible.?
73 curt wb8yyy