*Question G1A02:
[97.305] On which of the following bands is phone operation prohibited?*  

*Correct Answer is  B: 30 meters*  

### AI Response: (may contain errors)  

In the context of amateur radio, "phone operation" refers to voice communication modes, such as single sideband (SSB) or amplitude modulation (AM). The FCC regulates which modes can be used on different amateur radio bands.

1. **Correct Answer: 30 meters**

   - The 30-meter band is designated for digital modes and CW (Morse code) only. Phone operation is prohibited on this band to minimize interference with these modes, which are often used for weak-signal and long-distance communication.

2. **Why the Other Choices are Incorrect:**

   - **160 meters:** Phone operation is allowed on the 160-meter band. This band is often used for local and regional communication, especially at night.
   
   - **17 meters:** Phone operation is permitted on the 17-meter band. This band is popular for international communication, especially during daylight hours.
   
   - **12 meters:** Phone operation is also allowed on the 12-meter band. Like 17 meters, it is used for long-distance communication, particularly when the solar cycle is favorable.

3. **Useful Rules of Thumb:**

   - Always check the FCC Part 97 rules for specific band allocations and mode permissions.
   - Remember that some bands have specific restrictions to protect certain types of communication, such as digital modes or weak-signal work.

Understanding these regulations helps ensure compliance with FCC rules and promotes efficient use of the amateur radio spectrum.