*Question G1A10:
[97.205(b)] What portion of the 10-meter band is available for repeater use?*  

*Correct Answer is  D: The portion above 29.5 MHz*  

### AI Response: (may contain errors)  

In the context of amateur radio, repeaters are used to extend the range of communication by receiving a signal and retransmitting it at a higher power or from a better location. The 10-meter band, which ranges from 28.0 MHz to 29.7 MHz, has specific segments allocated for different types of operations.

1. **Correct Answer: The portion above 29.5 MHz**

   - The FCC regulations specify that the portion of the 10-meter band available for repeater use is above 29.5 MHz. This is because this segment is designated for FM voice and repeater operations, which are common in the upper part of the 10-meter band.

2. **Why the other choices are incorrect:**

   - **A: The entire band**  
     The entire 10-meter band is not available for repeater use. Only the segment above 29.5 MHz is designated for this purpose. Other parts of the band are allocated for different modes and types of communication, such as CW, SSB, and digital modes.

   - **B: The portion between 28.1 MHz and 28.2 MHz**  
     This segment is typically used for CW (Morse code) and data modes, not for repeater operations. It is too low in the band for FM and repeater use.

   - **C: The portion between 28.3 MHz and 28.5 MHz**  
     This part of the band is generally used for SSB (Single Sideband) voice communications. It is not allocated for repeater use.

3. **Useful Rules of Thumb:**

   - **10-Meter Band Segmentation:**  
     - **28.0 - 28.3 MHz:** Primarily for CW and data modes.
     - **28.3 - 29.7 MHz:** Primarily for phone (voice) operations, with the segment above 29.5 MHz specifically for FM and repeater use.

Understanding these allocations helps ensure that amateur radio operators use the correct frequencies for their intended mode of operation, complying with FCC regulations.