I think I fixed it but the problem was not electrical, or may have been only in part. The cover on the switch machine may have been just a little too snug, preventing the solenoid from engaging. But I also added an old Miniatronics CDU which seems to have given a little "jiuce" to the action. I know that Atlas switches like a higher voltage for engagement and all my old (from atr least 10 years ago) seem to play well. In any event, teh fact that I'm back in business is a happy ending in and of itself! If the Atlas 6924 boards were easily available, I'd probably have had this working a lot earlier. They help a lot.
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