Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

Բացատրություն

The 17 meter band starts at 18.068 MHz and the 12 meter band at 24.890 MHz, so both lie above the 10 MHz dividing line and use USB for voice. The LSB voice convention applies to the lower-frequency HF bands and stops at 40 meters.