@David Johnston posted:
The adjustable circuit breaker in the 1033 transformer was not very reliable. After there was a new design, Lionel even put a warning in the Service Manual about the possibility that the 1033 circuit breaker would not open. I would recommend that you put an external 5 amp modern circuit breaker or fuse in line with everything that is connected to post “A”. That way you can be sure you are properly protected.
I have been repairing, reconditioning and restoring postwar transformers for many many years. The circuit breaker used in the 1033 is totally unreliable. To the above post I say AMEN!!