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Frage 241

What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?

  1. 157.8 Hz
  2. 315.6 Hz
  3. 47.3 kHzRichtige Antwort
  4. 23.67 kHz

Erklärung

Half-power bandwidth is the resonant frequency divided by Q, so a Q of 150 at 7.1 MHz gives roughly 47.3 kHz between the −3 dB points. The kilohertz-versus-hertz distractors come from dividing in the wrong direction or misplacing the decimal.

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Frage 241: What is the half-power bandwidth of a resonant circuit that… · FCC Amateur Extra Class (Element 4) · Questena