[Eliot Ness]

BDI, I think you are confusing the field coil with the voice coil. The field coil is # 27 in the original drawing, that component is what you're replacing with the resistor. So green/white goes to one end of the (new) resistor and white goes to the other end. Find a value close to 1140 ohms and preferably in a wire wound version.

What you are seeing is a basic pi type of filter. You have two capacitors with an inductor (in this case the field coil) between them for added filtering. See below for the basic concept:

http://en.wikipedia.org/wiki/Capacitor-input_filter