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SSB vs. AM — Which is better for long-range communication?

April 5, 2026

Quick Answer

SSB is better for long-range communication due to its ability to carry a stronger signal and penetrate obstacles more effectively.

SSB Basics

SSB (Single Side Band) radio is a type of modulation used in CB (Citizens Band) communications. It operates on a specific frequency and converts voice signals into a higher frequency, which can then be transmitted and received by other SSB-capable radios. SSB signals are more efficient and can carry a stronger signal, making them ideal for long-distance communication.

AM vs. SSB Comparison

AM (Amplitude Modulation) signals, on the other hand, are more prone to interference and fading, which can significantly reduce signal strength and quality. SSB signals, however, can maintain a stronger signal even at longer distances and through obstacles such as hills, buildings, and weather conditions. In fact, SSB signals can travel up to 20 miles through heavy foliage, whereas AM signals may only travel up to 5 miles under the same conditions.

Choosing the Right Radio

When selecting a CB radio for long-range communication, look for one that is SSB-capable and has a high power output (up to 40 watts) and a wide frequency range (e.g., 26.065 MHz to 27.405 MHz). Also, consider a radio with a high-quality antenna, such as a quarter-wave or half-wave antenna, which can help to improve signal strength and penetration.

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