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I have a Lionel vintage train (pre war)set up on a small O27 oval and am running it with a vintage transformer. It is a LIonel Trainmaster Q, 75 watt with 4 terminals marked A, B, C, and U. I'm trusting that the U is the neutral. The A has an 8v near it, the B, a 14v near it , and the C, a 6v near it. I was supposing that I should wire the 14v to the center rail of the track and the U to the outside, but this doesn't offer enough power. The  A (8v) gives the power necessary. It doesn't seem logical. So I may not have the transformer wired correctly. Anyone care to clue me in? I am humbled by the fact that my larger layout with DCS and 80 watts of power works fine but this little setup is offering a challenge.

A follow up question: Should I wire any accessories ( eg. signal light) to different terminals? Thanks

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Before you go hooking up accessories to this transformer I would suggest using a volt meter or multimeter set to 50 volts A.C. or higher and measure the voltages on the different terminal combinations.

I don't have the Lionel instruction manual, that used to come with Lionel sets, in front of me to refer to, but it lists the voltage outputs of transformers from the post war time. Maybe I can locate it over the weekend.

 

Lee Fritz

 

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