12AX7/ECC83 Dual Triode Tube from Japan
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.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• 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