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The Citizens' Band radio service originated in the United
States as one of several personal radio services regulated
by the FCC. These services began in 1945 to permit citizens
a short-distance radio band for personal communication
(e.g., radio controlled models, family communications,
individual businesses). Originally, CB was located in the
460-470 MHz UHF band. There were two classes of CB: A and B.
Class B radios had simpler technical requirements but were
limited to a smaller range of frequencies. Al Gross,
inventor of the walkie-talkie, started Citizen's Radio Corp.
in the late 1940s to merchandise Class B handhelds for the
general public. The technology at the time was not advanced enough for
UHF radios to be practical and affordable for the average
consumer. So, in 1958, the Class D CB service was opened at
27 MHz, and this is what is popularly known as CB. There
were only 23 channels at the time; the first 22 were taken
from what used to be an Amateur 11-meter band, while channel
23 was shared with radio-controlled devices. Most of the 460-470 MHz band was reassigned for business
and public safety uses, but Class A CB is the ancestor of
the present General Mobile Radio Service GMRS. Class B, in
the same vein, is a more distant ancestor of the Family
Radio Service. The Multi-Use Radio Service is another
two-way radio service, in the VHF high band. An unsuccessful
petition was made in 1973 to create a Class E CB service at
220 MHz, this was opposed by amateur radio
organizations others. There are several other classes of
personal radio services for specialized purposes such as
remote control devices. Over time, several countries have created similar radio
services. While they may be known by other names, such as
General Radio Service in Canada, they often use similar
frequencies (26 to 28 MHz), and have similar uses, and
similar issues with antennas and propagation. Licenses may
or may not be required, but eligibility is generally simple. Some countries have personal radio services in the UHF
band, such as the European PMR446 and the Australian UHF CB.
Like the American FRS and GMRS services, these are more
properly covered in their own articles, as much of this
article is specific to the antenna and propagation issues of
the upper HF and lower VHF bands
Candida's Bazaar L.L.C.
- E-mail: Candidasbazaar@cox.net
- Tele: 702-321-6593
CANDIDA'S
BAZAAR
LEARN
ABOUT CB RADIOS
Citizens' Band
Radio
Citizens' Band radio (CB) is, in most
countries, a system of short-distance, simplex radio
communications between individuals on a selection of 40
channels within the 27 MHz (11 meter) band. The CB radio
service should not be confused with FRS, GMRS, MURS, or
amateur ("ham") radio. Similar personal radio services exist
in other countries, with varying requirements for licensing
and differing technical standards. In many countries, CB
does not require a license and, unlike amateur radio, it may
be used for commercial communication
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