I recently acquired a 6-2151 operating semaphore, and after repairing it, it works great! Except that according to my thinking, it's working backwards? The arm remains at rest in the horizontal position with a red light. When a train trips the trigger, it raises the arm to vertical and provides a green light ... pretty much the opposite of the 151 semaphores I have. What gives?
George
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It is interesting that the 6-2151 is working the way a real semaphore works. A voltage is put on the two rails through a resister and that drives the semaphore to the clear, green, position. A train comes along and connects, shorts, the two rails together. The voltage drops to zero and the semaphore arm drops to the red position. Fail safe operation.
@GeoPeg posted:I recently acquired a 6-2151 operating semaphore, and after repairing it, it works great! Except that according to my thinking, it's working backwards? The arm remains at rest in the horizontal position with a red light. When a train trips the trigger, it raises the arm to vertical and provides a green light ... pretty much the opposite of the 151 semaphores I have. What gives?
George
My MTH/Lionel one for Standard Gauge works the same way as yours, lol. I thought it was backwards too.
But I still think they look cool when operating so I have no problem with it.
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