Vacuum tube amplification system capable of reducing residual noise and a grounding method thereof

A grounding method for a vacuum tube amplification system, the vacuum tube amplification system comprising a first power circuit, a first vacuum tube amplification load circuit, a second power circuit and a second vacuum tube amplification load circuit, wherein the first power circuit supplies power to the first vacuum tube amplification load circuit for operation thereof, and the second power circuit supplies power to the second vacuum tube amplification load circuit for operation thereof, the grounding method comprising the steps of:

• electrically connecting the first power circuit and the second power circuit separately to a utility power alternating voltage;
• electrically connecting the first power circuit and the first vacuum tube amplification load circuit jointly to a first grounding end;
• electrically connecting the second power circuit and the second vacuum tube amplification load circuit jointly to a second grounding end;
• and
• electrically connecting the first grounding end and the second grounding end separately to a compliance ground of the utility power alternating voltage through a jumper-wire zero-ohm resistor, without electrically connecting the first grounding end directly to the second grounding end.

A vacuum tube amplification system, comprising:

• a first vacuum tube amplification load circuit having a first input signal end, a first output signal end and a first grounding end, the first input signal end electrically receiving a first audio input signal;
• a first DC power circuit for outputting a first DC voltage to be supplied to the first vacuum tube amplification load circuit for operation thereof;
• a second vacuum tube amplification load circuit having a second input signal end, a second output signal end and a second grounding end, the second input signal end electrically receiving a second audio input signal;
• a second DC power circuit for outputting a second DC voltage to be supplied to the second vacuum tube amplification load circuit for operation thereof;
• and
• a power transformer having an exciting coil, a first induction coil and a second induction coil, the exciting coil receiving a utility power alternating voltage, the first induction coil providing a first utility alternating power to the first DC power circuit, and the second induction coil providing a second utility alternating power to the second DC power circuit,
• wherein the first grounding end is not directly electrically connected to the second grounding end, the first grounding end and the second grounding end are each electrically connected to a compliance ground of the utility power alternating voltage through a jumper-wire zero-ohm resistor.

A grounding method for a vacuum tube amplification system, the vacuum tube amplification system comprising a first DC power circuit, a first vacuum tube amplification load circuit, a second DC power circuit and a second vacuum tube amplification load circuit, wherein the first DC power circuit supplies power to the first vacuum tube amplification load circuit for operation thereof, and the second DC power circuit supplies power to the second vacuum tube amplification load circuit for operation thereof, the grounding method comprises the steps of:

• receiving a utility power alternating voltage by a first exciting coil of a power transformer;
• electrically connecting a first induction coil and a second induction coil of the power transformer to the first DC power circuit and the second DC power circuit, respectively;
• electrically connecting the first DC power circuit and the first vacuum tube amplification load circuit to a first grounding end from inside to outside step by step;
• electrically connecting the second DC power circuit and the second vacuum tube amplification load circuit to a second grounding end from inside to outside step by step;
• and
• electrically connecting the first grounding end and the second grounding end separately to a compliance ground of the utility power alternating voltage through a jumper-wire zero-ohm resistor, without electrically connecting the first grounding end directly to the second grounding end.