What is the primary advantage of single sideband over FM for voice transmissions?

The primary advantage of single sideband (SSB) over frequency modulation (FM) for voice transmissions is that SSB signals have narrower bandwidth. This is significant because a narrower bandwidth allows for more efficient use of the available frequency spectrum. Since SSB only transmits one side of the signal, it requires much less bandwidth compared to FM, which typically occupies a broader frequency range to achieve its modulation.

This efficient use of bandwidth is particularly advantageous in amateur radio settings and can lead to less congestion on the amateur bands, allowing more operators to communicate simultaneously without interfering with one another. The reduction in bandwidth translates to improved signal clarity and range, especially in crowded frequency environments or during limited propagation conditions.

In addition to the benefit of narrow bandwidth, SSB is also easier to amplify, making it more effective for long-distance communications. This is why many operators prefer using SSB for voice transmission, particularly in the HF bands.