Circuitron 800-5520 SD-2 3-Position Semaphore Driver Figures Woodland Scenics BR4930 N Scale

Woodland Scenics BR4930 N Scale Built Up Structure - Municipal Building LED

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Circuitron 800-5520 SD-2 3-Position Semaphore Driver Figures Woodland Scenics BR4930 N ScaleCircuitron 800 5520 SD 2 3 Position Semaphore Driver Circuitron Electronics for Model Railroads Use with the Tortoise Switch Machine and an upper or lower quadrant semaphore style signal. Includes al the logic circuitry to drive the signal to all three positions. Works with BD 1 or BD 2 Block Occupancy Detectors. A minimum of two blocks must have detectors installed for the SD02 to indicate all three positions. Requires 10 18V DC power.