@Alan Mancus posted:Hi if what you're taking about is Lionell zw or kw transformer highly not recommended as the circuit breakers trip very slowly and you'll burn up the boards! I would recommend z4000 mth transformer or Lionell zwl electronic transformers!
Neither of your recommendations has any more protection from damaging transient voltage spikes than the ZW & KW have.
@MNeafus posted:...can a Lionel kw or 1033 operate it with out damaging the electronics...
Yes, for testing purposes both of these are fine... MTH prefers a pure sine wave power supply. If you are going to run modern electonics-laden trains for any time on a layout, EVERY transformer needs Transient Voltage Suppression in the form of bidirectional TVS diodes placed in parallel with the power supply.