Traveling Wave Tube Amplifier TWT
High-power vacuum tube amplifier using a helix slow-wave structure for microwave amplification in satellite communications. HTS 8540.89.00.80 covers this as other vapor or vacuum filled tubes for RF applications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If assembled into transmission apparatus
When integrated with modulator/driver, becomes complete transmission equipment.
If for radar apparatus
Radar-specific machines and their tubes fall under telecommunications equipment heading.
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Import Tips & Compliance
• ,Specify helix construction and vacuum envelope in technical literature for proper 8540 classification
Related Products under HTS 8540.89.00.80
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Electrostatic vacuum tube storing binary data as charge patterns on dielectric surface, read/written by electron beam. Rare computer memory technology classified under HTS 8540.89.00.80 as other tubes.
Geiger-Muller Counter Tube
Gas-filled tube detecting ionizing radiation through avalanche discharge between electrodes. Classified HTS 8540.89.00.80 as other gas/vapor filled tubes for radiation detection.
Xenon Flashtube Trigger Tube
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Spark Gap Protective Tube
Gas-filled tube providing overvoltage protection by controlled spark discharge between electrodes. Used in telecom/power systems. HTS 8540.89.00.80 as other gas-filled tubes.
Vacuum Photomultiplier Tube PMT
A vacuum tube containing a photocathode that emits electrons when struck by photons, which are then multiplied to produce a measurable current. Classified under HTS 8540.89.00.80 as a photocathode tube not specifically covered by other subheadings in heading 8540. Used in scientific instruments like scintillation detectors.