A perplexing puzzle: National NC-183D power transformer

[Kamakiri]

Here's one last shot.....a 5V4 gave its life so I could make a socket adapter for the top of the transformer so that I could wire everything to the existing 5U4 socket in the chassis enabling me to close the lid

Weird thing about this receiver.....the gain is off the charts. Local AM stations will overload the RF even with the gain on minimum unless I slightly de-tune them. Even the religious stations on shortwave do the same thing.

I'm not sure if this thing is just an incredible performer, or if there's an issue. To its credit, I was listening to the Voice of Vietnam and caught a QSO between two hams in the UK on it last night, and I've never heard either before....