Rider 4-3 Sears. Replacing 240 ohm line cord with new resistor. What wattage replacement are we l@@king at??

There are a few options when doing away with the line cord resistor. You can use just a resistor. Or an AC diode with less of a resistor. Also the use of an AC capacitor, and a surge resistor. This is a link that has an Excel spread sheet (Zip file at the bottom) that does all the math for you. It has the three options listed in the outcome.

http://www.vintage-radio.com/repair-restore-information/valve_dropper-calcs.html

As far as wattage, first figure the current across the resistor (if that is what you decide to use). Calculate watts = I^2R, and double for safety.

A dropping cap has a lot going for it. Use an AC-rated cap or a DC-rated cap of twice the AC voltage.
Doug

:As far as wattage, first figure the current across the resistor (if that is what you decide to use). Calculate watts = I^2R, and double for safety.
:
:A dropping cap has a lot going for it. Use an AC-rated cap or a DC-rated cap of twice the AC voltage.
:Doug
:

Doug:
You are right ... however it should be pointed out that the dropper-cap must NOT be a polarized (or electrolytic type).

Thanks, Peter. I suppose you could put two e-caps back-to-back? But, personally, I would go with film caps.
Doug

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:Doug:
:You are right ... however it should be pointed out that the dropper-cap must NOT be a polarized (or electrolytic type).
:
: