Originally Posted by farquard
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.