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Originally Posted by nasadowsk
Virtually all of the NYC subway today is solid state fed off of 3 phase 60hz power....
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No real questions here; just some thoughts: We heard from Swanson that the monitors are still being mumetal shielded; we know from nasadowsk the rotaries are now gone; I wonder if current shielding practices in the theater are unnecessary holdovers from rotary days? Maybe the new solid state units still spew out clouds of magnetic pollution. You wouldn’t think so.