Williams Engine and Horn

Pat,

The KW doesn't have a "Bell" button so you need to add an external Sound Activation Button:

You would wire this in-between the KW's 'A' post and the track's center rail replacing your existing wire to the track. (You could also replace the other wire with it but using 'A' to center rail is kind of standard).

The first time you push it you're either going to hear the bell, or you're going to hear the horn/whistle.  Since you want Bell, if you get Horn/Whistle instead then simply reverse the wires, i.e. if red currently goes to 'A' and black to the track then put black to 'A' and red to the track.

Mike

Mellow Hudson Mike:  can you look at the attachment and tell me if this is what you describe?  

And as a follow up, if I get the bell, will the bell ring every time I hit the button?

i assume that I would use a lock on, correct as I have drawn it.

@Pat K posted:

...as a follow up, if I get the bell, will the bell ring every time I hit the button?

Yes, the bell latches. The 5906 isn't necessarily a "bell" button, it can be used with ant transformer that needs a whistle or bell(or both) control added on.

@Pat K posted:

Mellow Hudson Mike:  can you look at the attachment and tell me if this is what you describe?  

And as a follow up, if I get the bell, will the bell ring every time I hit the button?

i assume that I would use a lock on, correct as I have drawn it.

Pat,

Your drawing is correct, but there is also something to remember.  Bell and Whistle/Horn operate on opposite polarities.  This means that, with the circuit the way you've drawn it, there's a 50/50 chance you'get Whistle/Horn when you push the new button instead of Bell.

If that happens simply reverse the connections from the button assembly to the track.  Put the red wire in place of the black as it sits, and put the black wire where the red was beforehand.

Regarding how horn/whistle and bell respond, horn/whistle sounds for as long as you hold the 'Horn/Whistle' button down.  The bell on the other hand begins to ring, about twice a second, when you push and release the 'Bell' button, then stops ringing the next time you push it.

Mike

Thanks to you and Rob.  So in effect, when the button is pushed, a “pulse” of electrical energy goes tru the power rail to the pickup roller on the tender, and that pulse will chose its device  (bell or whistle) on a circuit board to make the appropriate sound.  Is that about right?

@Pat K posted:

Thanks to you and Rob.  So in effect, when the button is pushed, a “pulse” of electrical energy goes tru the power rail to the pickup roller on the tender, and that pulse will chose its device  (bell or whistle) on a circuit board to make the appropriate sound.  Is that about right?

Yes.  A pulse of Direct Current (DC).

It's polarity determines whether the bell sounds or the whistle/horn.

Mike

Thank you guys. Every little bit helped to solve the problem