*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 (Continuous Wave) transmitting frequency, it's important to minimize interference with other stations operating on adjacent frequencies. Here's how to understand the correct choice:

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

1. **Why the Correct Answer is Correct:**
   - CW signals are typically very narrow in bandwidth, often around 150 Hz to 500 Hz. This means that to avoid interfering with adjacent stations, you should choose a frequency that is at least 150 Hz to 500 Hz away from other stations. This separation ensures that your signal does not overlap with others, minimizing interference.

2. **Why the Other Choices are Incorrect:**
   - **A: 5 Hz to 50 Hz**: This separation is too small. CW signals themselves are often wider than this range, so such a small separation would likely result in interference.
   - **C: 1 kHz to 3 kHz**: This separation is more typical for voice modes like SSB (Single Sideband), which have wider bandwidths. For CW, this is unnecessarily large and would waste valuable spectrum space.
   - **D: 3 kHz to 6 kHz**: Similar to choice C, this separation is excessive for CW and is more appropriate for wideband modes. It would lead to inefficient use of the frequency spectrum.

### Useful Rule of Thumb:
- **CW Bandwidth**: Typically around 150 Hz to 500 Hz.
- **Separation**: Match the bandwidth to ensure minimal interference, hence 150 Hz to 500 Hz is ideal for CW.

By understanding the typical bandwidth of CW signals, you can select the appropriate frequency separation to minimize interference effectively.