Not eaxctly no, and I dont have data, but the tube heater will need ac, I tried to run a crt tube from hf ac off a switcher and it wouldnt focus, dc isnt great for them either, so I will need a ac source, ie transformer.
I have the core out so I'm going to pull it apart, I have a mic to measure the wires, I also have some spray dielectric varnish, I'll clean up the lams and spray them before reassembly, as for the hum this trans has only 2 of 6 possible bolts holding it together so I'll put all 6 in, I can stand a little buzz.
Winding primaries next to the core and on the outside is common practice with switchers as it reduces leakage, didnt expect to see it on a 50hz iron lump.
I lost one iron E and i section tearing it down, I dont think that's make much diffo, but once I have the turns counted I'll run it through the transformer equation, if its close to saturation I'll put a few extra turns on everything.