Best Transformer for Running Postwar Locomotives.

Personally, I noticed that our trains ran better when I converted to Lionel 180w and 135w bricks about 15 years ago.  Based on that experience I have gravitated towards modern power sources and generally find the trains run better with them.  I like the bricks but a new ZW (pricey and powerful but you will be one and done) or z4000 would likely do better with your postwar than a period correct transformer and you will have the benefit of modern circuit protection.

I'm using a mid 1960's vintage LW my Uncle used to run his 229. I'm using that for my PE and my early 90's Chessie Steam Special. It works a whole lot better than the CW-80 I have. Oh by the way the 229 runs great.

Nothing beats the original ZW - I've got 4 on my layout. I use TVS diodes, fast acting breakers, and polyfuses.

Michael,

   There are lots of different good transformers for you to pick from.  The reason you think your current transformers are tired is that they are introductory type transformers. I always recommend that any decent layout be powered with at least a Z-1000 at minimum.  The old Lionel ZW's are great transformers, just use the 10 Amp resettable breakers with your modern train layouts.  Many people like the ZW-C's with the bricks, hate them myself, got no use for bricks.  The Z4K is an outstanding transformer, with the side receiver that opens up many running options, they are hard to beat.  The ZW-L is a great Transformer, if you want to mortgage your home to own one, top shelf power supply however.  If you decide to stay small and inexpensive with your transformers, get rid of the CW-80 and get another KW. 

Good luck with your Transformer purchase.

PCRR/Dave

Scotty we need more Power!