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Reply to "Reducing Volume on Mel's drive-in"

Originally Posted by Dennis S:

Wally,

 

When using Lionel type power supplies the terminal marked - U - is the common or ground terminal.

That's not universally true. Specifically, for the 1033, the U terminal goes to the center rail.  If not, the whistle will ring the bell instead.  There are a couple of other PW transformers that are wired that way as well, but the numbers escape me right now.  I happen to have a couple of 1033's here, so I know that one for sure.

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