At matchpoints, with both sides vulnerable, my partner opened one club. I bid one heart (one over one) with the following holding: (s) K9 (h) AQ87642 (d) J (c) A62.
Partner then bid one spade (showing at least four), and suggesting that the club might be "short" (it was). I bid three hearts to show my extra hearts. Partner bid four hearts, which I took to be a sign off with a minimum opener and maybe two hearts. We missed a slam because partner had KJ3 of hearts and 18 high card points (32 between us, and 10 hearts).
Did I do enough to show my values, given that partner actually had the more powerful hand? Or should I have done something stronger earlier, like "jump shift?"