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G4A01:What is the purpose of the notch filter found on many HF transceivers?

G4A01G4A

What is the purpose of the notch filter found on many HF transceivers?

Direct answer summary (2023-2027 NCVEC pool)

The official correct answer for G4A01 is To reduce interference from carriers in the receiver passband.

The key fact is To reduce interference from carriers in the receiver passband. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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More questions in G4A

G4A02What is the benefit of using the opposite or “reverse” sideband when receiving CW?G4A03How does a noise blanker work?G4A04What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?G4A05Why is automatic level control (ALC) used with an RF power amplifier?G4A06What is the purpose of an antenna tuner?G4A07What happens as a receiver’s noise reduction control level is increased?