[RodB]

I may be incorrect but you should measure around few ohms for the voice coil. In addition you may have a hum bucking coil which also would measure around one ohm. The OT primary will be 600 up to 2k and secondary 1 to 3 ohms. FC will be around 1200 ohms.

One lead from the OT primary may be connected to one lead of the field coil as this is the B+ supply from the field coil to 42 plate through the OT primary. Check the schematic for correct wiring.