CB Citizen Band
Welcome
CB is a Citizen-Band
Even without an amateur radio license, you can participate in radio events. Frequency ranges in the upper shortwave range (CB radio) and in the VHF/UHF range (Freenet and PMR) are available for this purpose.
However, only specially approved devices are permitted in these frequency ranges for license-free radio. Below is some information and frequencies as well as channels for CB radio as well as the PMR and Freenet area.
Here a first Introduction to Citizens Band Radio
CB radio, also known as Citizen's Band Radio, is a popular radio communications system used by private users for personal and business purposes. It provides a simple and accessible means of short-range radio communication and has a long history as an important part of communication for hobbyists, truck drivers, emergencies, and many others.
History of CB radio
The history of CB radio dates back to the 1940s, when the system was first introduced in the United States.
Originally intended for businesses and government agencies, CB radio frequencies were later opened for general public use. In the 1970s, CB radio experienced a massive surge in popularity due to films such as Convoy and the oil crisis, during which many people began using CB radios in their vehicles.
How CB radio works
CB radio uses short radio waves that operate on specific channels in the 27 MHz band.
These enable communication over short distances, usually in the range of a few kilometers to around 10 kilometers, depending on the atmospheric conditions and the performance of the devices.
Communication in CB radio takes place via AM (amplitude modulation) or FM (frequency modulation).
Each CB channel has a fixed frequency and the devices are set to communicate on a specific channel.
This aspect of CB radio makes it easy to use as all the user needs to do is select the channel on which they want to speak or listen.
CB radios and licensing
CB radios are generally inexpensive and easy to obtain.
They come in various forms, ranging from handheld units to stationary base stations for home or vehicle use.
In most countries, no license is required to operate CB radios, which has contributed to their widespread adoption and popularity.
Areas of application of CB radio
1. Leisure communication
Many people use CB radios for recreational activities, such as conversations between friends or within a local radio community.
2. Communication in transportation
Truck drivers use CB radios to communicate with each other to discuss traffic conditions, exchange warnings or ask for help when needed.
3. Emergency communications
In emergency situations, CB radio can serve as a backup communication system if other means of communication fail.
4. Technical support
In some cases, CB radio is also used for technical support or advice, particularly in auto or electronics repair.
Freenet, PMR, LPD/SRD: An overview of radio applications for private use
Radio communication has evolved over the years into a variety of applications suitable for private use. Freenet, PMR, LPD, and SRD are some of the common wireless technologies used for personal communication, recreational activities, and business purposes.
Freenet
Freenet is a short-range radio service used in many European countries.
It operates in the 149 MHz frequency band and offers a simple and cost-effective way for easy, short-distance communication. Freenet devices are usually available without a license and enable communication within a local group with a range of up to a few kilometers.
Freenet is well suited for leisure activities such as hiking, camping, and events, as well as for communication in small businesses. Its ease of use and low cost make it attractive for personal use.
PMR (Private Mobile Radio)
PMR is a term that covers a variety of radio services used for personal and business purposes. PMR devices typically operate in the UHF frequency range and are used in various fields including construction sites, events, security services, and other professional applications.
PMR devices offer a greater range compared to Freenet and, depending on the model, can cover distances of up to several kilometers. They are licensed on different channels, resulting in clearer communication and less interference.
LPD (Low Power Devices) / SRD (Short Range Devices)
LPD and SRD are radio services designed for the use of low-power devices.
They operate in license-free frequency bands and offer a limited range, usually up to a few hundred meters. These devices are often used for wireless communication in home and office environments.
LPD and SRD find applications in wireless telephone systems, remote controls, wireless alarm systems, and other short-distance applications. The low transmission power and limited range make them ideal for use in environments where interference with other radio services must be avoided.
Similarities and differences
All of these radio technologies—CB, Freenet, PMR, LPD, and SRD—offer possibilities for personal and business use, but with different ranges, frequencies, and applications. They are available for use without specific licensing, although rules and restrictions may vary by country.
While CB, Freenet, and PMR offer slightly longer ranges and more channels for communication, LPD and SRD are designed for shorter distances and more specific applications.
Future prospects
As wireless technology advances and the demand for wireless communications increases, these wireless technologies will likely continue to be used in various areas of personal and business life.
Innovations could lead to improved devices that offer greater range, better clarity, and additional features.