Watts/Volts SW vs TW

Classic Toy Trains Forum
1

I’ve researched many old posts on the subject, but I still lack some clarity on the outcome of these discussions so here’s my not so hypothetical:

If I’m running an early 1950’s Lionel F3 Alco AA freight set with several lit and some operating accessories and these were my only choices:

  1. A TW Transformer putting out full throttle 18 volts at 175 watts; or

  2. A SW Transformer putting out full throttle 20.5 volts at 130 watts.

Which transformer is more suitable for my layout?

2

The SW would be better for you if you have a two-motor F-3 as it can be loaded to it’s full output(~ 105-110 watts) on either A-U or B-U. A-U has the whistle/horn control.

The TW is two transformers in one housing, the most it can output for train control is ~ 60-65 watts. The TW is unique in all of “Lioneldom”. It is especially suited for small layouts with lots of accessories & lights where you would not want the varying load of the train having an impact on the operation of the accessories, or vice versa. The TW would be an excellent choice if the loco is a one-motored Alco AA.

Rob