Is there a difference between regular more often used hard type resistors & the soft flexible cloth covered type resistors??

The "flexible" ones likely actual wire wound with a heat/flame resistant cover. The "hard" ones can be a resistive composition, wire wound covered with a coating or other. Wirewounds can have have inductance issues and can have a limited resistance range but can handle higher currents depending on the design. Where are you seeing the "flexible" ones?

Sometimes the flexible resistors are used like a fuse in a high current draw application. It would be the weakest link in the chain to open first and not cause smoke and fire.

I'm recaping a 1939 Air King model 222,Rider 9-4,soft resistor going from 25L6 pin 8 to ground. I've notice this soft type resistor on radios from this time all the way into 50's tube type, so guess I'll replace with a hard type as this ones open.

Hi

I would use a 150 ohm @ 1 watt or greater for this cathode resistor. Even though it doesn't dissipate more than 1/2 watt still will be warm.

Norm

:I'm recaping a 1939 Air King model 222,Rider 9-4,soft resistor going from 25L6 pin 8 to ground. I've notice this soft type resistor on radios from this time all the way into 50's tube type, so guess I'll replace with a hard type as this ones open.
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1 Watt, 150 ohm works great. Thanks