FIELD: instrument engineering.
SUBSTANCE: invention relates to tube amplifier of audio frequency. In the present invention, a grounding structure and a method for grounding a tube audio amplifier are provided, wherein the grounding structure and the grounding method include: in the context of energy source – use of power supply without throttle and use of decoupling circuit and filament voltage regulator circuit; and in the context of the grounding method, use of the negative output of the audio output conversion circuit or the negative output of the filter capacitor in the power circuit as a single grounding terminal of the tube audio amplifier and implementation of the device without a grounding metal bottom plate in order to obtain a compact light table model of the tube audio amplifier.
EFFECT: reduced level of residual noise of a tube amplifier of audio frequencies relative to a power supply and ground source, as well as avoiding leaks.
16 cl, 12 dwg
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