The_Badger, on 2017-July-19, 02:02, said:
Basically, to sum up Tramticket. Some will ignore the double and bid naturally even after a 3rd in hand opening bid at equal vulnerability - their choice - and some of us will exercise some caution, and maybe demand a fifth ♠ to bid here, especially with a naff suit. There is no right way or wrong way of bidding this: it's all down to agreements. (Including the transfer responses detailed by miamijd.)
In your original post you didn't say whether you are playing 4M or 5M, so I think we have to assume 5M given this is the most popular opening these days. (Even in England nowadays, methinks.)
Bidding 1♠ does have its advantages: it can stop the opponents finding their fit; partner will know that you have a bid (6+HCPs); it's easy to find a 5-2♥ 2 level fit if partner bids on - and even if ♥s split badly, you hopefully have two entries in ♣ that will help your partner to pick up the suit.
What no commentator has said up to now is that South as the doubler is in the most dangerous position. He is vulnerable with a passed partner, so even though he might not have 4♠s (as highlighted by MrAce), he's going to have some strength to compensate surely.
There's even a slight (let's be honest remote) chance that North will leave the double in and your partner is left to play in 1♥X, so actually bidding and potentially increasing the level of the contract may not to your advantage.
So, in conclusion, I'd personally rather put the pressure on the doubler's partner (and the doubler) by passing initially.
If one of your small H were a small diamond, there would be a better case for passing (you don't have a "safety value" of 2H available). Likewise if your clubs were KQxx and your spades were Jxxx (why bid some lousy 6-count). But as it is, do you really want to sell to 1NT or 2D the other way? I don't (unless my partner opens ridiculously light in 3d seat, which is a treatment some like but I don't care for). I think we have a lot of really good chances to compete here:
1. Partner might have 4 spades
2. Partner might have 4 clubs
3. Partner might have 6 hearts
4. We might do OK in a 5-2 H fit or a 4-3 spade fit
5. 1S might take away LHOs bid and we might settle in 1NT.
Lots of chances. If you pass and it goes 1NT or 2D by LHO then back to you, now what? You probably have about half the points in the deck and some playable spot, but how are you going to find it? Better to bid 1S immediately.
The main drawback of an immediate 1S isn't that we get too high; it's that partner gets off to the wrong lead against a NT or diamond contract.
Cheers,
Mike