What condition may cause noisy operation of...

Question 1 / 27070QzZg77O7n6PKOjaaUOpN

Question 1 of 27070QzZg77O7n6PKOjaaUOpN

What condition may cause noisy operation of a VHF receiver?

Question 1 of 27070

What condition may cause noisy operation of a VHF receiver?

🔍 Key Concepts

• Relationship between bias voltage and amplifier gain/noise in receiver stages • How defective or open components usually affect signal level (louder vs. weaker/no output) • Function of the intermediate frequency (IF) amplifier versus the audio frequency (AF) amplifier in a VHF receiver

💭 Think About

• Ask yourself which condition is most likely to introduce extra noise into the receiver rather than just reduce or cut off the signal. • Consider what happens to an amplifier stage when its bias voltage is too low: does it distort and become noisy, or simply stop amplifying? • Compare whether a defective component in the audio stage would more likely cause silence/weak audio or a noisy hiss/static with normal signal strength.

✅ Before You Answer

• Verify which stage (IF vs AF) most directly affects the amount of received noise before audio reproduction. • Check whether an open winding or defective potentiometer in the audio stage would allow any signal to pass at all. • Think about how improper biasing in an IF amplifier might cause distortion or noisy operation rather than a complete loss of audio.

Question 1 of 27070

What condition may cause noisy operation of a VHF receiver?

An output signal that is larger than the input signal in an audio frequency amplifier stage.

A defective potentiometer in the audio frequency amplifier stage.

Low bias voltage to an intermediate frequency amplifier stage.

An open winding in a secondary of a coupling transformer in the audio frequency amplifier stage.

Question 1 / 27070QzZg77O7n6PKOjaaUOpN

Question 1 of 27070QzZg77O7n6PKOjaaUOpN

What condition may cause noisy operation of a VHF receiver?

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Question 1 of 27070

What condition may cause noisy operation of a VHF receiver?