I don't think there was a resistor in the original mains filter .
Hacked in , breaking the sort of sintered looking
metal at the leads leaving the metal to the capacitor at each end and 0 ohm
lumps that hold the leads.
I sacrificed a .1uF-100R new one and a very definite 3 band 100 ohm .5W
ceramic/MO resistor in that between one terminal lead and the sintery edge
of the capacitor.