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The ground signal were made from a MSE kit of parts. The same model was used below the base board as with the normal signals, but this time the brass tube ended just below the signal base pad and the control rod fitted into a hole in the white metal lever arms. The same method was used to limit the travel as before, but it is more important to get the operation working manually and to the correct limits as the force of the solenoid will pull the brass control rod straight out of the white metal and you can right-off an operating arm. I must have got through about 3 on each ground signal before I mastered the correct procedures. The other end of the operating arm was connect to a pin soldered on the reverse of the Disk to one side by a crank made from 0.020” brass wire. The main problem here is that the main casting also limits the amount of travel so to get realistic operation and the disk turning through the correct distance some of the casting had to be removed. Once the travel of the point motor is correct a small amount of super glue fixes the styrene in place.

A single ground signal - controlled from a point motor mounted under the board.

Construction of the signal actuating mechanism using a Hornby point motor

Ground Signals

A double 'totem pole' double ground signal.