If the field coil on just one speaker is bad, no sense replacing both, right?

Power supply chokes are usually specified by their current rating and there resistance. Your replacement should have a current rating of at least the maximum current through the coil. You can figure that by adding up the plate currents, etc., from a tube manual.

The coil resistance should be equal to the original. You can pad it with an extra power resistor if necessary. Figure power rating by I^2R and doubling for safety. After replacement, check the B+ voltages, especially since there is some uncertainty in reading the schematic. Trim the dropping resistor if necessary.

The inductance of the choke isn't critical.

You could forget the choke for the time being and just replace the field coil with a power resistor, and jack up the value of filter caps #93, #57, and #40 by 50-100%. That likely could give you acceptable hum.
Doug

:All right, guys: I will give up on the idea of repair. Now, the next question is can any of you tell me the resistance measurements for the field coils in this radio? I have enlarged the schematic and it looks to me that the 12" speaker field coil is 1100 ohms and the 10" is 4050 ohms. Does anyone have a better copy to verify this? I have read about the problem of increased hum when the EM speaker is replaced with a PM one due to the loss of the choke function of the field coil if one simply puts a resistor in it's place. So I'm assuming a better option would be to use a choke and a resistor (if needed to get the right resistance. Can anyone recommend a specific choke either from radio daze or AES? Thanks a lot. Mark from Kalamazoo