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While conventionally operating an MTH PS1 locomotive steam sounds are fine in neutral but when the engine moves the steam sound cuts out. If I move the engine to a TIU variable track and operate through my DCS remote the engine sounds work perfectly. Both tracks are powered by 2 different Z4000s. Any ideas?  Thank you.

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We know Proto-1'swere designed to run on a pure sine wave type transformers such as our old Lionels ones.  In theory the engine should run better with the Z-4000  rather  than the Var channel.  (most do)

Thinking ... is this a track problem or Z-4000 problem?   I suppose there's only one way to find out... switch out the track( Var channel) or transformer?

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