Tube question from a rookie

[Wind157]

I had someone else say B+ also (not sure what that is). There is a rectangular resistor near the rectifiers that I suspect is bad. Multimeter and resistance test don't give consistent results and there is corrosion on it's lead that seems to be coming from the resistor itself and no other components have any corrosion/oxidation at all. Waiting on a new one to confirm my theory.