A transit for cables and/or pipes through a partition. The transit comprises one or more parts made of a rubber or plastic material. Said at least one or more parts are made of a dissipative rubber or plastic material. For an explosive environment, the use of dissipative materials reduce the risk of an explosion due to electrostatic charges.

A transit for cables and/or pipes through a partition. The transit comprises one or more parts made of a rubber or plastic material. Said at least one or more parts are made of a dissipative rubber or plastic material. For an explosive environment, the use of dissipative materials reduce the risk of an explosion due to electrostatic charges.

The present exemplary embodiments proposes a vacuum tube amplifier module which removes a noise caused by external shock or vibration, including a vacuum tube amplifier which includes an amplifier in a vacuum tube to increase an energy of an input signal to output the energy as an output signal, an assembly unit which fixes at least one side of the vacuum tube amplifier so as to primarily remove the noise, and a magnet which is assembled in the assembly unit to levitate the amplifier so as to secondarily remove the noise to make the noise a predetermined reference value or lower.

The present exemplary embodiments proposes a vacuum tube amplifier module which removes a noise caused by external shock or vibration, including a vacuum tube amplifier which includes an amplifier in a vacuum tube to increase an energy of an input signal to output the energy as an output signal, an assembly unit which fixes at least one side of the vacuum tube amplifier so as to primarily remove the noise, and a magnet which is assembled in the assembly unit to levitate the amplifier so as to secondarily remove the noise to make the noise a predetermined reference value or lower.

A number of low voltage vacuum tube circuits include using supply voltages well below the manufacturer's recommended voltages applied to the plate or screen grid. Some of the tube circuits operate at near zero plate and or screen grid voltages. Other low voltage circuits have forward biasing on one or more grids that are normally biased at a non positive voltage or a grid that is normally connected a cathode. Substantially lower supply voltages allow for example, the filament supply to also supply voltage to the plate and or grid for providing an output signal at a grid and or a plate.

A number of low voltage vacuum tube circuits include using supply voltages well below the manufacturer's recommended voltages applied to the plate or screen grid. Some of the tube circuits operate at near zero plate and or screen grid voltages. Other low voltage circuits have forward biasing on one or more grids that are normally biased at a non positive voltage or a grid that is normally connected a cathode. Substantially lower supply voltages allow for example, the filament supply to also supply voltage to the plate and or grid for providing an output signal at a grid and or a plate.

A vacuum tube for amplifier circuit includes: a light incidence window that transmits signal light; a photoelectric conversion unit that converts the signal light transmitted through the light incidence window into photoelectrons; an output unit that has an anode, on which the photoelectrons are incident, and outputs a signal corresponding to the incident photoelectrons; and a grid electrode that is disposed in a path of the photoelectrons from the photoelectric conversion unit to the anode and controls the amount of photoelectrons incident on the anode.

A vacuum tube for amplifier circuit includes: a light incidence window that transmits signal light; a photoelectric conversion unit that converts the signal light transmitted through the light incidence window into photoelectrons; an output unit that has an anode, on which the photoelectrons are incident, and outputs a signal corresponding to the incident photoelectrons; and a grid electrode that is disposed in a path of the photoelectrons from the photoelectric conversion unit to the anode and controls the amount of photoelectrons incident on the anode.

A vacuum tube amplification system includes: a first power circuit electrically connected to utility power alternating voltage to transform it into a first DC voltage; a first vacuum tube amplification load circuit having a first grounding end, the first vacuum tube amplification load circuit using the first DC voltage as operating voltage; a second power circuit electrically connected to the utility power alternating voltage to transform it into a second DC voltage and output the second DC voltage; and a second vacuum tube amplification load circuit having a second grounding end, the second vacuum tube amplification load circuit using the second DC voltage as operating voltage. 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 vacuum tube amplification system includes: a first power circuit electrically connected to utility power alternating voltage to transform it into a first DC voltage; a first vacuum tube amplification load circuit having a first grounding end, the first vacuum tube amplification load circuit using the first DC voltage as operating voltage; a second power circuit electrically connected to the utility power alternating voltage to transform it into a second DC voltage and output the second DC voltage; and a second vacuum tube amplification load circuit having a second grounding end, the second vacuum tube amplification load circuit using the second DC voltage as operating voltage. 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.