*Question G2B04:
When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?*  

*Correct Answer is  B: 150 Hz to 500 Hz*  

### AI Response: (may contain errors)  

When selecting a CW transmitting frequency, it's important to minimize interference to stations on adjacent frequencies. The correct answer is:

**Correct Answer: B: 150 Hz to 500 Hz**

### Explanation of the Correct Answer:
- **Minimum Separation**: A separation of 150 Hz to 500 Hz is recommended to ensure that your signal does not interfere with nearby stations. This range allows for the natural bandwidth of CW signals and helps to avoid overlap with adjacent frequencies, which can cause interference.

### Why the Other Choices are Incorrect:
- **A: 5 Hz to 50 Hz**: This range is too narrow. While it may seem like a small separation, it does not account for the bandwidth of CW signals, which can lead to significant interference.
  
- **C: 1 kHz to 3 kHz**: This range is unnecessarily wide for CW operation. While it provides separation, it exceeds the typical requirements for minimizing interference, making it less efficient for frequency usage.

- **D: 3 kHz to 6 kHz**: Similar to option C, this range is excessively wide for CW signals. It is not practical for minimizing interference and does not align with standard operating practices.

### Rules of Thumb:
- **CW Bandwidth**: The typical bandwidth of a CW signal is about 100 Hz to 200 Hz. Therefore, a separation of 150 Hz to 500 Hz is appropriate to ensure clear operation without interference.
- **Adjacent Frequency Operation**: Always consider the operating practices and recommendations from the amateur radio community to maintain good operating standards and minimize interference.

By adhering to the recommended separation of 150 Hz to 500 Hz, you can effectively reduce the risk of interfering with adjacent stations while operating in the CW mode.