[drh4683]

carmine,
Ive had this same thing happen to a 25MC33 chassis.
you opened up the B+ fuse on that set, most likely due to a highly leaky filter cap. If the filter cap is in this condition, it will start burning up the filter choke. Im curious if the wrong fuse was in there. (that burnt up transformer you pictured is the filterchoke). the belfuse you need should be a zenith 136-66 (2 amp).
The one lead of the filterchoke is soldered directly to a filtercap. Its should be an 80uf@475v. Take it out of the circuit and test it for leakage. On the schematic, its C117B (hemisphere). The filterchoke helps smooth out DC ripple with the combination of the filtercap on the 350V B+ supply. Even though it appears burnt up, it may very well still be OK. If you test it, you might only read a couple ohms. Thats ok.