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Originally posted by jeffmoss26:
What I am wondering is, does the power come from an external supply? Or from the KSU?
My KSU (an ITT 601) has 105v available on it, I think from the power supply, but perhaps the ring generator. I'm not sure if that was the case on whatever KSU this was hooked to back in the 70's.

Of course, almost all of my 1A2 knowledge can be found in 1 thread on this site. That, and the manual I've practically memorized.