Yes, more turns of smaller wire yields a stronger magnetic field. I know that in the Kadee world, using DC instead of AC with their e-m uncouplers, also produces a stronger field at the same voltage. Just be sure you use a good quality momentary contact switch, that reliably turns off when released, or you'll still have meltdowns. And only hold the button for a second or so to prevent heat buildup.
Bill in FtL
