Re: Wiring at top of helix


I agree with the Frog Juicer suggestion from Tam Valley.
Whether placed on the Wyes of on the Helix, the key is to not have two segments of track wired with an AR (auto-reverser) circuit, adjacent to one another. There must be an “unswitched” segment — at least as long as your longest train (if using cars with metal wheels, the length of the loco if using only plastic wheeled cars) — between the AR-wired segments, or the ARs will fight with themselves as metal wheels cross the gap between segments, creating shorts on both sides, and triggering both ARs to try to switch phase polarity.
Bill Demarest

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