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

The correct sideband commonly used for 10 meter HF, VHF, and UHF single-sideband communications is the upper sideband. In amateur radio, the use of upper sideband (USB) for these frequency ranges is a standard practice due to its advantages in reducing distortion and achieving clearer communication.

Upper sideband transmission modulates the audio signal above the carrier frequency, allowing for more efficient use of available bandwidth. This is particularly important on higher frequency bands, where clarity and efficiency can significantly enhance communication range and quality.

While other sideband options like lower sideband might be used in different contexts or frequency bands, such as HF below 10 meters, it is the upper sideband that is universally recognized and employed for VHF and UHF operations in amateur radio. Understanding this convention helps ensure effective communication among operators using similar equipment and practices.