this post was submitted on 19 Apr 2025
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Photography

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Rotary Converter, IRT Subway Substation 13, Midtown Manhattan, 2017.

All the pixels, no Metrocard required, at https://www.flickr.com/photos/mattblaze/32992380451

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@mattblaze@federate.social haha I came to this thread thinking "didn't they use mercury arc rectifiers, like DC elevators and such?" and learned that they didn't!

So thanks for that. ๐Ÿ˜‹