DRW wrote:
And I'd like to know: Are they all o.k. or is there a specific converter that I should definitely use because it's better than the others?
(For example, if there's a converter that implements the lockout chip itself, this one would be better than one of those converters where you have to insert two cartridges.)
I think this remained unanswered, but there are actually a lot of adapters out there that don't have a connector for the extra pins used by certain cartridges with special chips. You know the two short additional edge connectors on each side of the standard one. The linked Honeybee adapter has them, though. That's the kind you want.
On top of that, there is of course the 50/60hz difference, as with NES which can potentially cause some games to behave wrong, though I haven't ever actually seen an example of that. A lot of games do a built in check though, and refuse to start if you're running at the "wrong" refresh rate. You can always just start those in one and then switch to the other though, if you have modded a switch on your SNES.
This is the solution I use personally - I don't have a region mod on my console, but I do have a 50/60hz switch, and use it in combination with my passive adapter.
ONE MORE THING, though, I have come across exactly one game that refused to work with a regular passive adapter like the ones discussed in this thread. That jap-only Godzilla fighting game. I can make only make it work on a PAL console using an Action Replay 3. I think Super Mario RPG may have the same issue, but I always played that on my NTSC console, so I can't confirm or deny. I think this may be irrelevant to you though. I've never heard of any PAL game giving the same issue on NTSC consoles. Though it's pretty uncommon to even try it, so it might be unknown territory.
Finally, the best "catch-all" solution is the "Super CIC" custom chip you can mod into your SNES, it works without switches and automatically detects the correct region for the carts you insert.