Receiver or amplifier tubes
Thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or gas filled tubes, mercury arc rectifying tubes, cathode-ray tubes, television camera tubes); parts thereof: > Other tubes: > Receiver or amplifier tubes
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified 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.
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.
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
The 6V6GT is a beam tetrode vacuum tube used in output stages of small radio receivers and musical instrument amplifiers, valued for its musical tone and efficiency in class AB operation. Its compact glass envelope suits vintage equipment restoration. HTS 8540.81.00.00 as a standard receiver/amplifier tube.
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.
7025 Pentode Audio Output Tube
The 7025 is a ruggedized military-spec pentode equivalent to the 12BY7, used in audio output stages and vertical deflection amplifiers in vintage television receivers. Its durability suits harsh environments. Fits HTS 8540.81.00.00 as receiver/amplifier tube.