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Prewar No. 69 warning signal

D DLCOGR Forum Member
I'm having difficulty wiring a Prewar No. 69 warning signal to fastrack.  I purchased the fastrack accessory track and hooked it up per the directions.  Accessory track + and - directly to the warning signal.  When I add track power the bell rings continuously.  The accessory track is supposed to isolate the block and only trigger the warning signal when the train travels over it and completes the circuit.  I'm a novice when it comes to electrical diagnostics.  Any advice is apreciated.  Thanks.
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F&G RYF&G RYOGR Forum Member

The accessory is very simple to wire. One wire to hot is 2nd wire to common. The insulated track makes common via the wheels bridging the common to the insulated rail.

 

1st thing to do is make sure the insulated rail is insulated. Test it, take the track out the the loop and touch the common wire to the insulated rail side with common to the other outside rail and power to the signal. If it works the rail is not isolated. Put it back in the loop and make sure it is still isolated.

 

Using a relay is not a solution because the relay still needs to a trigger devise and right now the insulated rail is not working correctly.

F&G RYF&G RYOGR Forum Member
Originally Posted by Dale H:

The problem without a relay is that the train wheels carry the current for the bell,you may get a lot of arcing and intermittent contact as the train enters and leaves the block.  The relay with a capacitor will work much smoother. 

 

Second the bell will put out a lot of voltage spikes. If you are running modern equipment with PC boards,it is best to power the bell on a circuit separate form accessories with PC boards,LEDs etc or at least add a TVS in the circuit,preferably across the leads of the #69 bell. 

 

Dale H

All true. However, the issue at hand is getting the insulated track to work properly.

I would also put a on/off switch in the common because this bell can be annoying.A push button to ring the bell is also nice.

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