Grid-Controlled Vacuum Tube from Canada
Triode vacuum tubes with control grid for amplification in audio and RF applications. HTS 8540.89.00 covers these thermionic tubes where grid modulates electron flow from cathode to anode.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Gain factor, plate voltage ratings, and filament current specs essential
• NOS (New Old Stock) certification for vintage tubes affects valuation
• Confirm vacuum tube vs. transistor under 8541 for audio amplifiers