Amateur Extra Class: 2020–2024
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E9E05:

How must an antenna's driven element be tuned to use a hairpin matching system?

  1. The driven element reactance must be capacitive
  2. The driven element reactance must be inductive
  3. The driven element resonance must be lower than the operating frequency
  4. The driven element radiation resistance must be higher than the characteristic impedance of the transmission line
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