Citizens Band (CB) radio

Citizens Band (CB) radio is a short-distance, two-way radio communication system that operates on specific frequencies designated for public use. CB radios are popular among individuals for personal and business communication, particularly in situations where mobile phones may not be practical or available.

Here are some key points about CB radios:

Frequency Range:

CB radios operate on a set of 40 channels within the 27 MHz (11-meter) band. Each channel has its own frequency, and users are required to follow certain regulations and etiquette to avoid interference.

License-Free:

In many countries, including the United States, the use of CB radios is license-free for individuals. This contributes to their widespread popularity.

Channels and Bandwidth:

CB radio channels have a bandwidth of 10 kHz, and users are limited to a maximum power output of 4 watts for AM (Amplitude Modulation) transmission.

Uses:

CB radios are commonly used for short-range communication, such as between vehicles in a convoy, truckers on highways, or individuals in rural areas where other communication methods might be impractical.

Equipment:

A typical CB radio setup includes a transceiver (combination of a transmitter and receiver), an antenna, and a power source. There are also mobile CB radios designed for use in vehicles.

Codes and Etiquette:

CB radio users often use “handles” or nicknames rather than their real names. There are also specific codes and etiquette, such as the “10-codes” (e.g., 10-4 for “message received”) and the use of the term “breaker” to request communication on a busy channel.

Limitations:

CB radios have limited range compared to other radio communication systems. Factors such as terrain, weather, and obstacles can affect signal quality and reach.

While CB radios were more popular in the past, they still find use today, especially in certain industries and among hobbyists who enjoy the unique culture and communication style associated with CB radio use.