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Old 10-17-2019, 10:27 AM   #3
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Join Date: Jul 2010
Location: Detroit, Michigan
Posts: 2,371
Scales Modeled: O, HO, N
Originally Posted by farquard View Post
I noticed that on the original box for the Lionel #81 rheostat, it shows the rheostat wired between the track and the transformer. BUT the transformer shown has a throttle.

What is the purpose of the rheostat, when your transformer has a throttle? Thanks.
I believe that early transformer only has four contact points, or four speeds. With the rheostat wired in beyond it you'd have finer speed control. Just my best guess.

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