*Question T7B11:
What is a symptom of RF feedback in a transmitter or transceiver?*  

*Correct Answer is  C: Reports of garbled, distorted, or unintelligible voice transmissions*  

### AI Response: (may contain errors)  

To understand the symptoms of RF feedback in a transmitter or transceiver, let's analyze the correct answer and the other choices.

### Correct Answer: 
**C: Reports of garbled, distorted, or unintelligible voice transmissions**

- **Explanation**: RF feedback occurs when the transmitted RF signal re-enters the transmitter's circuitry, causing interference and distortion. This feedback can lead to audio issues, resulting in garbled or unintelligible voice transmissions. The feedback can disrupt the modulation process, making the transmitted audio sound distorted to the receiving station.

### Why the Other Choices are Incorrect:

- **A: Excessive SWR at the antenna connection**
  - **Explanation**: While high Standing Wave Ratio (SWR) can indicate problems with the antenna system, it is not a direct symptom of RF feedback. High SWR typically results from mismatches in the antenna system, such as a faulty antenna or incorrect feedline connections, rather than feedback within the transmitter.

- **B: The transmitter will not stay on the desired frequency**
  - **Explanation**: This symptom is more indicative of issues with the transmitter's frequency stability or drift, possibly due to poor oscillator performance or thermal effects. RF feedback may cause frequency instability, but it is not the primary symptom associated with feedback itself.

- **D: Frequent blowing of power supply fuses**
  - **Explanation**: Blowing fuses usually indicates excessive current draw, which can be caused by a short circuit, overload, or other electrical issues. While RF feedback can lead to increased power draw in some cases, it is not a typical symptom of feedback. Instead, it points to a more serious electrical problem.

### Summary:
- The correct answer (C) directly relates to the audio quality issues caused by RF feedback.
- The other options describe different problems that do not specifically indicate RF feedback.

### Useful Rule of Thumb:
- If you experience distorted audio or reports of unintelligible transmissions, check for RF feedback issues, which may involve inspecting grounding, antenna placement, and ensuring proper isolation of the transmitter from its output.