Klystron Power Amplifier Tube
Klystron tubes are specialized linear beam vacuum tubes used for amplification of microwave signals in high-power applications like radio transmitters and particle accelerators. Classified under HTS 8540.89.00 as other thermionic tubes due to their electron beam focusing mechanism in vacuum environment.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for transmission apparatus
Certain microwave transmission tubes classified under 8525 when integral to transmission equipment.
If other electrical machines components
May shift if imported specifically as particle accelerator component rather than general tube.
If laser-related applications
Laser system tubes classified under optical instruments when laser-specific design features present.
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Import Tips & Compliance
• Include frequency range and power output specs in commercial invoice for proper duty assessment
• Export control documentation often required for high-power klystrons due to dual-use technology
• Avoid misclassification as broadcast equipment parts under 8525; these are standalone amplifier tubes
Related Products under HTS 8540.89.00
Magnetron Injection-Locked Tube
Phase-locked magnetron tubes for coherent microwave power combining in radar systems. Classified under HTS 8540.89.00 as specialized thermionic tubes with injection locking circuitry for phase control.
Xenon Flashtube Trigger Tube
High-voltage gas tubes triggering xenon flashtubes in high-intensity strobe lighting. HTS 8540.89.00 covers these as other gas-filled tubes initiating capacitive discharge through gas ionization.
Thyratron Gas-Filled Switching Tube
Thyratrons are gas-filled tubes containing low-pressure inert gas used for high-power switching and rectification in industrial applications. They qualify under HTS 8540.89.00 as other gas-filled tubes functioning through gas ionization triggered by cathode emission.
Ignitron Mercury Arc Rectifier Tube
Ignitrons are large mercury arc rectifier tubes used for high-current DC power conversion in industrial applications like aluminum smelting. HTS 8540.89.00 includes these mercury vapor-filled tubes operating via cathode-initiated arc discharge.
Photomultiplier Tube (PMT)
Photomultiplier tubes convert weak light signals into electrical pulses through electron multiplication across multiple dynodes. Classified under HTS 8540.89.00 as photocathode tubes designed for photon detection in scientific instruments.
Hydrogen Thyratron Pulse Modulator Tube
High-speed hydrogen thyratrons designed for pulse power applications in radar and particle physics, offering fast recovery times. HTS 8540.89.00 covers these gas-filled tubes optimized for repetitive high-voltage switching.