[Ron Ramirez]

I can read it - it says "30 - 67 Ohm Candohm".

They needed to drop the filament string from 117 volts to 86 volts. Ideally, a 103.33 ohm resistor is needed for that, but they also needed to provide for two dial lamps. So they used a 30 ohm resistor in parallel with the dial lamps (which is also part of the filament dropping resistor) and a 67 ohm resistor.

That only adds up to 97 ohms.

Now you're hitting that radio with 125 volts.

I would increase the 67 ohm section to 100 ohms to make up for the higher AC line voltage, since you have to replace this Candohm anyway. The tube filaments will thank you by lasting longer.

Use the power calculation formula to determine wattage, then double the result for safety.

The filament string is drawing 0.3 amps. We know each resistor is 30 ohms and 100 ohms, so we have the numbers we need to do the math.

P = I (squared) R

P = 0.3 * 0.3 * 30 = 0.09 * 30 = 2.7 watts
Use a 5 or 10 watt resistor for the 30 ohm section.

P = 0.3 * 0.3 * 100 - 0.09 * 100 = 9 watts
Use a 20 or 25 watt resistor for the 100 ohm section. You can get a metal clad resistor to save space; it will have to be mounted on the chassis and will run warm.