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Chuff wiring on an LGB Mikado

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algae:
Hi,

I'm converting an LGB Mikado and have questions about the chuff wiring.

It appears that there are a black and brown wire coming off the motor block that is likely to be the chuff circuit.  A friend of mine converted a Mikado some years ago and insists that the chuff signal only requires one wire.

The chuff signal is generated by 4 little magnets on the rear-most drive wheel rotating past a magnet mounted on the motor block.

Is the chuff circuit two wires or one wire?  Does it have polarity?  My guess is two wires, no polarity.

gregeusa:
weird, most LGB use a hall effect switch... and it is 3 leads... can you see where the wires connect?

algae:
It could be a Hall effect switch - there are two three-wire plugs coming off the motor block.  If it is, how can I tell which of the wires is positive, negative, ground?  And will I blow it up if I wire it wrong?

algae:
Here's the board.

gregeusa:
Contact one of the LGB dealers and you might get a schematic.  If hall effect it is power, ground, and "signal"

Yes, hook it up wrong and you usually kill it.

Greg

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