6AL5 Electron Tube Diode-Triode
The 6AL5 is a miniature dual diode-triode vacuum tube used in RF detection and FM discriminator circuits in vintage radios. It qualifies under HTS 8540.89.00.40 due to its thermionic diode and triode sections in a glass envelope vacuum tube design. Primarily used in restoration projects and amateur radio equipment.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If replaced by integrated circuit version
Modern electronic integrated circuits performing similar functions classify under heading 8542.
If when part of complete radio receiver assembly
Tubes incorporated into finished radio equipment fall under heading 8518 for reception apparatus.
If for use specifically in oscilloscopes
Parts dedicated to measuring instruments like oscilloscopes classify under heading 9030.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide vacuum tube filament voltage/current specs to distinguish from modern SMD components
• Include base pinout diagrams confirming octal or miniature 7-pin construction typical of thermionic tubes
• Declare quantities accurately as these are often imported in bulk for collectors and repair markets
Related Products under HTS 8540.89.00.40
1BV7 Photomultiplier Tube Diode
The 1BV7 is a vacuum tube diode-triode used in photomultiplier applications for detecting low levels of light in scientific instruments. It features a photocathode and multiplier stages within a thermionic tube structure, classified under HTS 8540.89.00.40 as a diode-triode photocathode tube. This tube operates by converting photons to electrons via the photocathode for amplification.
12AT7 Double Triode Vacuum Tube
The 12AT7 (ECC81) is a medium-gain dual triode vacuum tube essential for audio preamplifiers in guitar amps and hi-fi systems. Classified under HTS 8540.89.00.40 as a tetrode-equivalent through its dual triode configuration in thermionic vacuum tube form. Known for its low noise and musical tone characteristics.
6BA6 Pentagrid Triode Converter Tube
The 6BA6 is a heptode/pentagrid triode vacuum tube designed for superheterodyne radio frequency conversion. It falls under HTS 8540.89.00.40 as a multi-grid thermionic tube functioning as a triode-heptode combination. Used in classic AM broadcast receivers.
EF86 High-Frequency Pentode Triode
The EF86 is a high-gain pentode vacuum tube used as the first audio stage in classic guitar amplifiers. Classified under HTS 8540.89.00.40 for its multi-electrode thermionic construction equivalent to triode-pentode functionality. Renowned for warm overdrive tone.
6SN7GT Dual Triode Audio Tube
The 6SN7GT is an octal base dual triode vacuum tube prized for phase inverters and driver stages in hi-fi and guitar amps. It qualifies for HTS 8540.89.00.40 as a medium-mu thermionic triode in glass envelope form. Features indirectly heated cathodes for low hum.
E88CC/6922 Frame Grid Triode
The E88CC (6922) is a premium frame-grid dual triode vacuum tube for professional audio and measurement equipment. Classified under HTS 8540.89.00.40 due to its advanced thermionic construction with rigid frame grid elements. Used in broadcast consoles and test instruments.