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Quote Originally Posted by WalkerYYJ View Post
Hey guys, first post here however this is something I am somewhat familiar with (well their use rather than disassembly.)



They are referred to as Toroidal Transformers and are generally used in specialty power applications...
Also PS.... big ones like these can be relatively expensive depending on the intended application/rating...

digikey.com/product-detail/en/MED4000/MED4000-ND/2505668