[Phlogiston]

You can put a resistor in place of the field coil, but your speaker still won't work And you get a hot resistor to deal with and no filter choke. Best to replace it.

Where I said that rewinding the rf coil is easy, rewinding a field coil is not - unless you have a coil winder, then it is easy too. It can be done by hand, but keeping the coil cheeks from bowing outward is the real issue.