Feedback stabilizationof magnetohydrodynamical modes in reversed field pinches is studied in cylindrical geometry, taking into accounta finite number of coils, both in poloidal and toroidal directions.The robustness and stability of the feedback scheme is analysed by means of Nyquist diagramsfor different arrangements of the feedback coils and magnetic sensors.The feedback can be adversely affected by the coupling of different Fouriercomponents from the discrete coils, and configurations are sought where thiscoupling does not seriously degrade the performance.The requirements on the feedback system arediscussed for different cases andlow gain solutions are identified.