Most tube gear uses a multisection electrolytic capacitor of some type in the
power supply. These capacitors smooth out the pulsed DC voltage that is converted
from the stepped up AC voltage from the transformer by the rectifier tube.
The metal can often provides a common ground point for the capacitors when mounted
directly to the chassis. I could disconnect the wires and leave it in place; mounting
the replacement capacitors underneath the chassis. It is easy enough to gut the can and
put the replacement capacitors inside, using the original terminals underneath the can.
The old can had already been separated from the chassis, so I'll disconnect and mark the wires.