[morzh]

Yes I would be describing a resonant circuit if the Z(l)=Z© if it weren't for that resistor.


However the resistor in the first place will shift the phase and will dampen the resonance.

I think they use the resistor to compensate for the field coil own resistance which is pretty close (1140 Ohm vs 1000 Ohms ) so the cap could be chosen to have the same impedance as the coil at the 60Hz.

The effect is the same during the resonance (counter-phased currents at the same frequency) but it is not really a resonance once you introduced the loss element in there.