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I have a k line scale up caboose with smoke unit and it gets extremely bright at legacy 18 volt track voltage.  Can I just put in the 1 amp diode on the hot lead of the ac from the center roller and operate it on 9 volt dc.  In other words will the 1 amp or a 1/2 amp diode handle the current.  The caboose has stream lighting and does not appear to want to come apart so I would put the diode underneath on each center hot lead.  I need a small diode.

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Originally Posted by gunrunnerjohn:

Yep, the diode will cut the power in half to the bulbs, they'll thank you for it.  The 1A diode will be plenty.

 

You only need one diode in the feed to the stream lighting, don't worry about how it's wired.

 

 

This would be the cheapest route to take. There are other types of bulbs one can use also. Don't fall for the most used and least understood practice of switching out bulbs. Sometimes the new bulb will run even hotter than the one removed. The wiser choice of bulbs can run upwards of $2.00+ ea. in most cases.

John, it is hard to see in your pic but are those lights on the roof of the car or on the bottom? I am not familiar with the K-Line cars.
Ray
 
Originally Posted by gunrunnerjohn:

Not really easy with the K-Line stream lighting Bruce, it's an integrated solution.  Here's a picture of a passenger car installation, the caboose will be similar.

 

 

 

 

My k-line 13" passenger cars have three 3-3/4 volt bayonet bulbs in series in my recently acquired PRR Fleet of Modernism version.
They call these "stream lighting" also.

After running them conventionally, I took a few laps with my TMCC GG1 and toasted a lamp in two cars. Unlike the Christmas lights with shunts, if one goes out, you lose all lighting. 
A guess a diode would help these also. Or I could use 6 volt bulbs. But I would be concerned about melting the roofs.
Maybe LEDs are the way to go.
Originally Posted by gunrunnerjohn:

Yep, the diode will cut the power in half to the bulbs, they'll thank you for it.  The 1A diode will be plenty.

 

You only need one diode in the feed to the stream lighting, don't worry about how it's wired.

 

 

John

will the 1 amp diode handle the current draw for the smoke unit as well?  I had put a 4 amp diode inside mine, not knowing the current draw.

Bob

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