A device reduces its energy consumption using a relatively lower frequency and lower power secondary oscillator to maintain timing information when a higher frequency and higher power primary oscillator is inactivated. Output exemplars are processed to detect spatially localized clusters of non-zero probability pixels. Flux movement through the rotor is in a radial direction and high efficiencies and motor control are achieved. The mandrel is locked in a fixed position by a lockdown nut that prevents upward movement induced by fluid. The second conductor having a length that is less than or equal to about one quarter wavelength and has an inductive reactance that offsets a capacitive reactance of the parasitic capacitance.