*Question T8A06:
Which sideband is normally used for 10 meter HF, VHF, and UHF single-sideband communications?*  

*Correct Answer is  A: Upper sideband*  

### AI Response: (may contain errors)  

The correct answer to the question is **A: Upper sideband**. 

### Explanation of the Correct Answer:
- **Upper Sideband (USB)** is the standard mode used for single-sideband communications on the 10 meter HF band, as well as on VHF and UHF bands. This is primarily due to historical practices and the technical characteristics of these frequencies, which favor USB for voice communications.

### Why the Other Choices are Incorrect:
- **B: Lower sideband (LSB)**: 
  - LSB is typically used for frequencies below 10 MHz (such as the 80, 40, and 20 meter bands). It is not the standard for 10 meters, VHF, or UHF.
  
- **C: Suppressed sideband**: 
  - This term refers to a method of modulation where one sideband is suppressed, but it does not specify which sideband is used. It is not a specific mode of operation like USB or LSB.
  
- **D: Inverted sideband**: 
  - This is not a standard term used in amateur radio. It may refer to a theoretical concept but does not apply to practical communications on the specified bands.

### Summary:
- For 10 meter HF, VHF, and UHF single-sideband communications, the standard is to use **Upper Sideband (USB)**. This is a convention that helps ensure compatibility and clarity in communications across these bands. 

Remember, knowing the standard practices for different bands is crucial for effective communication in amateur radio!