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Like the others I'd check carefully to see what inhibiting the switch from moving. The buzzing is something that can happen if the machine is getting an insufficient amount of power or is prevented from moving. It's an audible indication something isn't happening as expected. <br /> <br />I'd investigate a capacitive discharge system for the turnouts. There are many designs out there, all relatively the same. Almost any of the model railroad books on electronics have them. They give a strong pulse of power built up in the capacitor but one which dicipates quickly and can't burn out the switch machine. I've build several for different layout and for friends and they work great. <br /> <br />Bob
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