Content deleted Content added
→Current use: PC-"deaf ears" replaced with a more politically correct phrasing. Tags: Mobile edit Mobile web edit |
Rescuing 3 sources and tagging 0 as dead. #IABot (v1.6.1) (Balon Greyjoy) |
||
Line 16:
The citizens band radio service originated in the United States as one of several personal radio services regulated by the [[Federal Communications Commission]] (FCC). These services began in 1945 to permit citizens a radio band for personal communication (e.g., radio-controlled model airplanes and family and business communications). In 1948, the original CB radios were designed for operation on the 460–470 MHz UHF band.<ref>http://www.retrocom.com/wtcollect/27_megacycle_history_in_the_u.htm 27 Megacycle History, retrieved 2010 Feb 9</ref> There were two classes of CB radio: "A" and "B". Class B radios had simpler technical requirements, and were limited to a smaller frequency range. [[Alfred J. Gross|Al Gross]] established the Citizens Radio Corporation during the late 1940s to manufacture Class B handhelds for the general public.<ref>Kneitel (1988:13)</ref>
[[Ultra-high frequency]] (UHF) radios, at the time, were neither practical nor affordable for the average consumer. On September 11, 1958<ref>Kneitel (1988:14)</ref> the Class D CB service was created on 27 MHz, and this band became what is popularly known today as "Citizens Band". There were only 23 channels at the time; the first 22 were taken from the former [[amateur radio service]] 11-meter band, and channel 23 was shared with radio-controlled devices. Some hobbyists continue to use the designation "11 meters" to refer to the Citizens Band and adjoining frequencies. [[Part 95]] of the Code of Federal Regulations regulates the Class D CB service, on the 27 MHz band, since the 1970s and continuing today.<ref>[https://www.webcitation.org/62bRm7l4h?url=http://apps.fcc.gov/eas/comments/GetPublishedDocument.html?id
</ref> Most of the 460–470 MHz band was reassigned for business and public-safety use; Class A CB is the forerunner of the [[General Mobile Radio Service]] (GMRS). Class B CB is a more distant ancestor of the [[Family Radio Service]]. The [[Multi-Use Radio Service]] is another two-way radio service in the [[Band III|VHF high band]]. An unsuccessful petition was filed in 1973 to create a Class E CB service at 220 MHz, which was opposed by amateur radio organizations<ref>In the Americas, the [[1.25 meters|220 MHz]] band is used by ham operators</ref> and others. There are several other classes of personal radio services for specialized purposes (such as [[remote control]] devices).
Line 77:
===Canada===
In [[Canada]], the General Radio Service uses the identical frequencies and modes as the United States citizens band, and no special provisions are required for either Canadians or Americans using CB gear while traveling across the border. The General Radio Service was authorized in 1962. Initially, CB channels 1 through 3 remained allocated to amateur radio and channel 23 was used by [[pager|paging services]]. American CB licensees were initially required to apply for a temporary license to operate in Canada.<ref>Matt P. Spinello, ''Touring Canada With Your CB Rig'', in ''Elementary Electronics'' magazine, Davis Publications, New York; Volume 10 No. 2, July/August 1972, pp. 55–56</ref> In April 1977, the service was expanded to the same 40 channels as the American service.<ref>Government of Canada Department of Communications, "[http://www.spectralumni.ca/Brochures/TRC-40.pdf TRC 40: Licensing of General Radio Service Equipment] {{webarchive|url=https://web.archive.org/web/20110706203636/http://www.spectralumni.ca/Brochures/TRC-40.pdf |date=2011-07-06 }}'', January 1, 1977; retrieved 3 Jan 2010</ref>
===Indonesia===
Line 264:
# 27.152 MHz – Japanese Remote Control R/C Frequency
[[Indonesia]] has the usual 40 channels at 27 MHz, plus a unique 60-channel allocation from 142.050 MHz – 143.525 MHz.<ref>[http://www.postel.go.id/content/ID/regulasi%5Cfrekuensi%5Ckepmen%5Ckm%20nomor%2077-2003%20krap.pdf An Indonesian government decision regarding CB, with frequency charts] {{webarchive|url=https://web.archive.org/web/20160120224026/http://www.postel.go.id/content/ID/regulasi/frekuensi/kepmen/km%20nomor%2077-2003%20krap.pdf |date=2016-01-20 }}</ref>
In [[Brazil]], CB operators can use up to [[:pt:Serviço Rádio do Cidadão#Frequência e canalização|80 channels]] (from 26.965 MHz to 27.805 MHz).
| |||