Sorry I did not give enough background.
The train will be O gauge. The transformer puts out AC only. It only has two AC posts, and a lever for a throttle control. No other controls or buttons.
The rectifier kit says that it is for converting AC to DC power for O gauge trains.
The purpose of having the DC power running to the track is to run the DC train itself, not for an accessory or turn table.
I just want to be able to install a reverse polarity switch in the DC line before it attaches to the track, so that I can switch the polarity in the tracks, and run the DC train backwards if I want to.
I am hoping that this will work. (If you think it won't, then please let me know.)
Thanks for all info.
Mannyrock