An A high calldown

[sweetjazz]

I open on the button with A [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/spade.gif[/img]. Only the BB calls. He's 35/5 ish PF... no definite read on him postflop but seems like he might be a bit erratic. That could just be a small sample size effect, combined with my suspicious/paranoid mind.

Flop is J [img]/images/graemlins/diamond.gif[/img] 7 [img]/images/graemlins/club.gif[/img] T [img]/images/graemlins/diamond.gif[/img].
He bets, I call.

Turn is 4 [img]/images/graemlins/club.gif[/img].
He bets, I call.

River is J [img]/images/graemlins/club.gif[/img].
He bets, I call.

To me the close decision comes on the turn. How did I do?