Microwave Backward Wave Oscillator Tube from Canada
Backward wave oscillator tubes generate tunable microwave signals for test equipment and radar. HTS 8540.89.00 includes these velocity-modulated tubes producing electromagnetic waves through backward wave interaction.
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
• Frequency tuning range and output power specifications critical
• Magnetic field strength requirements for operation documented
• Avoid classification under signal generators (9030.82)