HMW,
I think you missed the answer in a previous post. As I read it, the reasoning for pure DC machines was that they did not have the ability to produce AC output, so the operator could not switch and run rods with AC when no-one was looking.
I could be wrong. It's what I understood.
Later,
I think you missed the answer in a previous post. As I read it, the reasoning for pure DC machines was that they did not have the ability to produce AC output, so the operator could not switch and run rods with AC when no-one was looking.
I could be wrong. It's what I understood.
Later,
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