Scoring: MP
In a recent county mixed pairs event RHO opened 1♠. I doubled , passed round to partner who jumped to 6♣. Partner was justifiably very unhappy seeing dummy and went 1 off after not being able to pick up the ♣K. OK my bid was bad and although not an excuse (I had been holding a long series of passing hands) it raises some questions about the principles of equal level conversion doubles.
Beef up the hand to say ♠Kxx ♥KQxx♦ AJ10xx ♣x, is this the type of hand to make a take out double if you have agreed ELC? If so how should partner respond holding a powerful 1-suited hand? It seems to me that you need some clearly defined agreements using ELC to avoid getting into trouble. Suppose the bidding goes 1♠-x-3♠-?. Now what does partner do with ♠x, ♥Axx, ♦Kx, ♣ AQJxxxx? (This was not partner's actual hand, I have lost the computer print-outs)
What are the views on ELC's? If you use them, do you have agreements on what qualifies apart from the equal level criterion? Do you have agreements on limits to jump responses?

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