I'm bidding 6
♠.
The bidding suggests that partner is void in
♦s. It is unfortunate that double of
♦ would have been penalty: I prefer it as 'extra values, no clear direction', such that 3
♥ would have been specifically a
♥ try, and now I could draw an inference about the
♥ situation (a tenuous one, admittedly, since partner might accept all game tries with a
♦ void.
As it is, I am hoping to lose only one major suit trick... Kxx Kxxx void Jxxxxx is all I need even when trump are, as they may well be, 3-0.
Heck, KQx xxx void Qxxxxxx is virtually cold for 7
♠ so I can hardly do less.
BTW, I would never have considered a penalty double with this hand. RHO is red. and presumably knows it. He must have an unusual hand... void xx Jxxxxxx AKQx.... catch LHO with xxx Kxx xxx Jxxx and try to beat 3
♦ while missing your vulnerable slam.
(Note that on this hand, a penalty double would indeed be the 'double to end all penalty doubles', but not in quite the way suggested by iggy

)
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari