[bandersen]

Didn't say your B+ was OK, just explaining how the power supply works. That cap shouldn't be getting warm.

That is a 7.5 ohm fusible resistor. They were commonly used to protect the selenium rectifiers from a surge on power up as well as act as a fuse for the B+. The value isn;t critial but you may want to increase it a bit if you replaced the seleniums with silicon diodes. Silicon is more efficient and will raise the B+.

While the Sams doesn't state the B+ right at C2, they do list many other voltages. If they are close, I'd say your B+ is OK.

Those are ceramic caps and rarely go bad. Don't mess with them.