*Question G2C07:
When sending CW, what does a “C” mean when added to the RST report?*  

*Correct Answer is  A: Chirpy or unstable signal*  

### AI Response: (may contain errors)  

When sending CW (Continuous Wave), the RST report is a standard way to communicate the quality of the received signal. The "C" in the RST report specifically indicates that the signal is "chirpy" or unstable.

### Explanation of the Correct Answer:
- **Correct Answer: A: Chirpy or unstable signal**
  - The "C" in the RST report signifies that the signal has irregularities, such as frequency variations or instability, which can make it difficult to copy. This is important for the receiving operator to know, as it affects the readability of the signal.

### Explanation of the Incorrect Answers:
- **B: Report was read from an S meter rather than estimated**
  - This choice is incorrect because the RST report does not differentiate between readings taken from an S meter or estimated values. The "C" specifically refers to the quality of the signal, not the method of measurement.

- **C: 100 percent copy**
  - This choice is incorrect because a "C" does not indicate a perfect copy. Instead, a perfect copy would typically be indicated by a "5" in the RST report, which means the signal is clear and easily readable.

- **D: Key clicks**
  - This choice is incorrect because key clicks refer to unwanted artifacts in the signal caused by the way the keying is done, but they are not represented by the "C" in the RST report. Key clicks can affect the quality of the signal but are not synonymous with chirpiness or instability.

### Summary:
- The "C" in the RST report indicates a chirpy or unstable signal, which is crucial for understanding the quality of the CW transmission. The other options do not accurately describe what the "C" represents in this context. 

This understanding is essential for effective communication in amateur radio, especially when dealing with CW signals.