I would just remove the solder blobbed winding and replace it with the
same gauge wire with the same number of turns as the original. Perhaps
time for a nice, clean new resistor as well.

It's a parasitic choke to suppress VHF oscillation and should not be
that critical.

Just replicate the original and everything should be OK.

John

It could be the choke had too much inductance on 10 meters,
and the resistor showed signs over heating; or even parasitic oscillations
could have caused issues with the resistor overheating. Most hams
would "tinker" with the circuit in an attempt to stumble on a "cure".
I'd wonder if the orignal plate chokes are still in place?

Pete