The plate current of the final RF amplifier...

Question 1 / 20dRWGd0w4zMTyUX9EouZW

Question 1 of 20dRWGd0w4zMTyUX9EouZW

The plate current of the final RF amplifier in a transmitter increases and radiation decreases, if the antenna circuit is in good order, what could be the cause?

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Question 1 of 20

dRWGd0w4zMTyUX9EouZW

The plate current of the final RF amplifier in a transmitter increases and radiation decreases, if the antenna circuit is in good order, what could be the cause?

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🔍 Key Concepts

• Behavior of plate current vs RF output power in a final amplifier • Effects of detuning, bias loss, and neutralization on a transmitter’s final stage • How grid excitation, faulty tubes, and parasitic oscillations can change current and radiation

💭 Think About

• If plate current increases but RF radiation decreases, what does that tell you about how efficiently DC power is being converted to RF power? • Which of the listed problems would cause the tube to draw more current while producing less useful RF output? • Are any of the listed causes mutually exclusive, or could several of them lead to the same symptom of high plate current and low radiation?

✅ Before You Answer

• For each choice (A, B, C), ask: Would this increase plate current AND decrease RF output? • Consider whether detuning and loss of bias both affect operating point and efficiency in a way consistent with the symptom. • Check if parasitic oscillations and faulty tubes can draw power without radiating effectively at the desired frequency.

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Question 1 of 20

The plate current of the final RF amplifier in a transmitter increases and radiation decreases, if the antenna circuit is in good order, what could be the cause?

Neutralization may have been upset

The plate circuit may have been detuned, bias may have been lost

Grid excitation may have decreased, there may be a faulty tube, or there may be parasitic oscillations

All of the above

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Question 1 / 20dRWGd0w4zMTyUX9EouZW

Question 1 of 20dRWGd0w4zMTyUX9EouZW

The plate current of the final RF amplifier in a transmitter increases and radiation decreases, if the antenna circuit is in good order, what could be the cause?

Back

Question 1 of 20

dRWGd0w4zMTyUX9EouZW

The plate current of the final RF amplifier in a transmitter increases and radiation decreases, if the antenna circuit is in good order, what could be the 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