Quote:
Originally Posted by Rat
Those are the dynamic brakes with the resistor banks residing on the roof for better heat dissipation and that's where the noise is coming from. The S200's should have better sound insulation but I believe the components are the same as on the SD's.
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Still on the roof? Sounded like Siemens was swapping solid state things under floor and things with moving parts that can clog with snow up top.