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Old 10-17-2019, 01:29 PM   #5
Join Date: Aug 2018
Location: NNJ
Posts: 1,184
I believe the rheostat was also used to run trains off batteries as not every house had convenient AC outlets (or outlets at all). I saw a Lionel pic of an early transformer that came with a light bulb adapter attached to it's AC plug for use with light sockets.
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