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About the Layout

RTAC Software


The Randall Museum in San Francisco hosts a large HO-scale model train layout. Created by the Golden Gate Model Railroad Club starting in 1961, the layout was donated to the Museum in 2015. Since then I have started automatizing trains running on the layout. I am also the de-facto layout maintainer. This blog describes various updates on the Randall project and I maintain a separate blog for all my electronics not directly related to Randall.

2018-01-13 - Brancheline Power

Category Randall

The power for the Branchline includes a Lenz Digital Plus LK100:

This is a DCC Reverse Loop polarity reverser.

Yes, the branchline is a reverse loop.

An engine going from B321 (mainline) to branchline will come “in the back” in the tunnel in the reverse direction.

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