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· Premium Member
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I fixed my buzzing 10 amp Ultima by doing the following:

There is a small wooden wedge that has loossened due to time/drying out. This keeps the lamanitaations tight.

I used a small plastic hammer and tapped this wedge in tighter and the buzzing stopped.

3 years later and the buzzing has started again.

Just turn up the sound on your trains and that will lower the buzzing sound.
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