FIELD: electricity.
SUBSTANCE: device (200) containing test circuit (230) of power supply unit (100) resonance frequency, receiver (211a) and control unit (220) is intended for change of resonance frequency of the above receiver (211a); at that device (200) can change resonance frequency of the above receiver (211a) depending on resonance frequency of the above power supply source (100).
EFFECT: reduction of weight.
33 cl, 14 dwg
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