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Anyone out there- <br />Obviously, it is possible to m-u an AC powered unit with a DC since I see both kinds lashed together. But I have difficulty understanding how that can be accomplished, I guess. How does that work? Are speed and brake commands the only things transmitted from one locomotive to another, to the point that the type of power (AC or DC) doesn't matter? Somehow, I got the impression that like-powered units ONLY (AC-AC or DC-DC) would run together. Obviously I'm wrong. I'd like very much to hear just how the whole system works!
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