The MF/HF receiver fails to produce any AF...

Question 1 / 20QtAET4jPxFxA3dl6o4hK

Question 1 of 20QtAET4jPxFxA3dl6o4hK

The MF/HF receiver fails to produce any AF output. An ohmmeter reading is near zero between speaker leads. What is the most likely cause?

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Question 1 of 20

QtAET4jPxFxA3dl6o4hK

The MF/HF receiver fails to produce any AF output. An ohmmeter reading is near zero between speaker leads. What is the most likely cause?

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🔍 Key Concepts

• Relationship between ohmmeter readings and speaker coil condition • Difference between faults in RF/IF stages and audio (AF) output components • How a shorted load vs open or low-gain amplifier would appear in resistance measurements

💭 Think About

• What does a near zero ohms reading across speaker leads tell you about the physical condition of the speaker coil? • If the RF or AF amplifier stages failed but the speaker itself were healthy, what resistance would you expect to see across the speaker leads? • Which option specifically describes a component whose DC resistance you can directly measure across the speaker leads with an ohmmeter?

✅ Before You Answer

• Confirm what a normal speaker voice coil resistance typically measures (a few ohms, not open and not exactly zero). • Check which answer choices refer to something that would be seen directly at the speaker terminals with an ohmmeter. • Eliminate choices that refer to signal amplification issues rather than a physical short visible as near-zero resistance.

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Question 1 of 20

The MF/HF receiver fails to produce any AF output. An ohmmeter reading is near zero between speaker leads. What is the most likely cause?

The 3 - 30 MHz amplifier stage has failed.

The speaker is shorted out.

Excess negative feedback is reducing AF gain.

The audio amplifier stage has failed.

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Question 1 / 20QtAET4jPxFxA3dl6o4hK

Question 1 of 20QtAET4jPxFxA3dl6o4hK

The MF/HF receiver fails to produce any AF output. An ohmmeter reading is near zero between speaker leads. What is the most likely cause?

Back

Question 1 of 20

QtAET4jPxFxA3dl6o4hK

The MF/HF receiver fails to produce any AF output. An ohmmeter reading is near zero between speaker leads. What is the most likely cause?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed