Circuitron 800-5520 SD-2 3-Position Semaphore Driver Figures Apply Hob-e-Tac (sold separately) and

Apply Hob-e-Tac (sold separately) and wait until clear and tacky

rusty truck gets the owner around town just fine

What’s a backyard without bicycles

A girl teases a honking goose and a boy draws back on a slingshot

Circuitron 800-5520 SD-2 3-Position Semaphore Driver Figures Apply Hob-e-Tac (sold separately) andCircuitron 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.