Microwave Backward Wave Oscillator Tube from Germany
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 — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, 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)