12AX7/ECC83 Dual Triode Tube
The 12AX7 (ECC83) is a miniature dual triode vacuum tube widely used as a low-noise preamplifier in guitar amplifiers, studio preamps, and vintage radio receivers. Its high gain and low microphonics make it ideal for audio signal amplification. Falls under HTS 8540.81.00.00 as a classic receiver/amplifier thermionic tube.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when imported as parts of complete cathode-ray tube assemblies
Tube components specifically for CRT televisions/monitors classify under dedicated CRT parts subheadings.
If sold as part of complete microphone amplifier systems
Complete audio amplification apparatus falls under speaker/microphone headings rather than individual tubes.
If for use in vintage computer or data processing equipment
Early computing machines with vacuum tube circuitry classify under parts of automatic data processing machines.
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Import Tips & Compliance
• Require manufacturer test data showing mu factor and gain characteristics typical of amplifier tubes
• Label with exact electrical specs to prevent confusion with power tubes
• Obtain FCC compliance if marketed for broadcast receivers
Related Products under HTS 8540.81.00.00
EF86 Pentode Vacuum Tube
The EF86 is a high-gain pentode vacuum tube designed specifically as a low-noise amplifier for audio preamplifiers in radio receivers and hi-fi equipment. It operates as a receiver or amplifier tube by amplifying weak signals in the audio frequency range. Classified under HTS 8540.81.00.00 as it is a thermionic vacuum tube used for signal amplification.
6L6GC Beam Power Amplifier Tube
The 6L6GC is a beam power tetrode vacuum tube used primarily as an output amplifier in push-pull audio amplifiers for radios and musical instrument amplifiers. It handles high plate voltages for efficient power amplification. HTS 8540.81.00.00 covers this as a receiver/amplifier tube despite power applications.
EL34 Pentode Power Tube
The EL34 is a power pentode vacuum tube renowned for its use in audio power amplifiers, particularly in British hi-fi and guitar amplifier designs like Marshall stacks. It provides rich harmonic distortion ideal for musical applications while serving as an amplifier tube. Classified in 8540.81.00.00 as a thermionic receiver/amplifier tube.
6V6GT Beam Tetrode Tube
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ECC88/6DJ8 Low-Noise Triode
The ECC88/6DJ8 is a dual triode vacuum tube prized for its extremely low noise floor in phono preamplifiers, headphone amps, and RF front-ends of communications receivers. Its high transconductance enables superior signal handling. Under HTS 8540.81.00.00 as a premium amplifier tube.
KT88 Beam Power Tube
The KT88 is a large beam power tetrode vacuum tube capable of 50+ watts output, used in high-end audio amplifiers and professional sound reinforcement systems. Its linear performance suits both hi-fi and public address applications. HTS 8540.81.00.00 classification for amplifier tubes.