The model 28 KSR I have has a LESU with no part number, and broken wires, things like that.

So I want to wire the loop supply directly to the selector magnets (unless there is a better way).

There are two selector magnets, so there are 4 wires.

They appear to be orange, yellow, brown, and white.

Any advice on how I should hook up the loop supply here?

It's been a long time, but I'm assuming one selector magnet is for the typing unit, and the other is for the keyboard.

My long time goal is to hook this up to an arduino so that I can send reports to it periodically.

Thanks,

Virgil

N5IVV