Does anybody recognize this transformer? I was unable to locate/verify the part number on YDS’ (Yuan Dean Scientific co) website.
A lot of magnetic components are custom-wound rather than being standard products, so it’s possible that that’s an internal part number with no public specification. The black bobbin & yellow tape of the sort shown are standard materials used for making such things.
That said, “EE” is a fairly common reference to a component produced from two “E” format cores, “19” might be a size designator, “202” could conceivably be some sort of value, and the 1012 could be a date code. Or not. And there’s really no guarantee that it’s a transformer per-se either–it could also be a plain old inductor or something like a common-mode choke.