EF86 Pentode Vacuum Tube from Mexico
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.
Duty Rate — Mexico → United States
14.2%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Verify tube specifications match receiver/amplifier use to avoid reclassification as display tubes; provide datasheets confirming thermionic operation
• Comply with U.S. radiation safety standards for vacuum tubes
• Watch for counterfeit tubes from certain origins lacking quality certification