", "(CB Rule7) On what channels may I operate? Citizen's Band (CB) 26 - 27 MHz (HF), 11 Meter Band, 40 Channels. The SE-10MB can also be adjusted to operate on the 11 Meter band. After this date, use of unregistered 23channel CB sets was deemed illegal and unlicensed sets were no longer eligible to be licensed. 11DX.net 11m DX Cluster With solid state radios becoming more common in the 1970s, the FCC revised this specification at the same time the authorized channels were increased to 40. HB9CV - 2 Element Yagi for the 11 meter band - popular-hifi.com CB is the 11 meter band. An example of correct designations: C9EF, C9EA, C9RF, C9RA. Even though the 27 MHz Part 15 band extends from 26.980 MHz to 27.280 MHz, the second harmonics of these bands are 27.108 MHz MHz - 27.132 MHz or 27108 kHz to 27132 kHz. US Amateur Radio Bands: Frequency Charts The radio is normally in receive mode to receive transmissions of other radios on the channel; when users want to talk they press a "push to talk" button on their radio, which turns on their transmitter. We mimick Amateur Radio bands as well as the 11 meter band. Check out our interesting Features and Screenshots. Military HF use [ edit] In the US and Canada, as well as the Americas (ITU Region 2) as a whole, there are no pre-designated HF allocations for military use. Old 11 meter ham band - Transmission1 (11). [35] However, legal CB equipment sold in Europe does follow the North American channel designation. My first attempt at making a CB radio antenna for the 11 meter band. Voice transmissions in a Morse code-only segment are easily detectable by authorities. References This page was last edited on 25 January 2023, at 02:26 (UTC). Channels24[27.235MHz], 25[27.245MHz], 52[26.675MHz], 53[26.685MHz], 76[26.915MHz, and channel77[26.925MHz], The term "outbanding" was introduced by Kneitel in the August1979 issue of, * GL 226 (VK3PJB) ex-Secretary GL Club, Australia, channel assignments for CB use in the United States, Learn how and when to remove this template message, European Conference of Postal and Telecommunications Administrations, "Fading CB craze signals end to licensing", "Back in view, a First Lady with her own legacy", "Radiocommunications (27MHz Handphone Stations) Class Licence 2015", "Radiocommunications (Maritime Ship Station 27MHz and VHF) Class Licence 2015", "Licensing of General Radio Service Equipment", "Citizens Band (CB) Scanner Frequencies and Radio Frequency Reference", "Arrt du 31 mars 1992 relatif aux caractristiques techniques et aux conditions d'exploitation des postes C.B. shortwave) band. AboutPressCopyrightContact. SE-6MB Moxon Support us with donation! Because many people were already using 40channel radios prior to legalization, the American band plan (with AM and SSB) was adopted; a VHF band was added in 1994, along with allowing use of the Australian UHF CB channel plan at 476-477MHz On 10November 1980, the Indonesian Directorate General of Posts and Telecommunications issued another decree establishing RAPI (Radio Antar Penduduk Indonesia) as the official citizens band radio organization in Indonesia. HamSphere is a shortwave simulation. Used mostly by truckers and some off road clubs (4WD) Not extremely reliable, gets pretty crowded on the channels and the language on there can be pretty offensive at times. Al Gross established the Citizens Radio Corporation during the late 1940s to manufacture classB handhelds for the general public. All frequencies in the HF spectrum (330MHz) can be refracted by charged ions in the ionosphere. During low sunspot activity it may be impossible to use skywave at all, except during periods of Sporadic-E propagation (from late spring through mid-summer). Late in 2006, the FCC amended the regulation to exclude only 2628MHz to facilitate amateur 10meter operation. Some hobbyists continue to use the designation "11meters" to refer to the Citizens Band and adjoining frequencies. This helped prevent overcrowding on channel11, enabling a CBer to monitor a town's home channel to contact another CBer from that town instead of a making a general call on channel11. With the FCC's minimal enforcement of its CB rules, enthusiasts in the US use "export radios" or European frequency modulation (FM) CB gear to escape the crowded AM channels. A license from ICASA is required to purchase or use a CB radio in South Africa. Most CB radios sold in the United States have the following features: 27MHz is a relatively long wavelength for mobile communications, and the choice of antenna has a considerable impact on the performance of a CB radio. [3]:174 On some newer radios, the modification may be as simple as disconnecting a jumper wire or a diode. Stack two for additional (up to +3 dB) forward gain. CB RADIO homemade Dipole antenna in a loft. - YouTube Prefix Lists. The citizens band radio service originated in the United States as one of several personal radio services regulated by the Federal Communications Commission (FCC). A typical citizen band radio service is a two-way radio system that can be used for personal or business communication. The Indonesian government legalized CB on 6October 1980 with a decision by the Minister of Communications, the "Ministerial Decree on the Licensing for the Operation of Inter-Citizens Radio Communication". [40] Lax enforcement enables manufacturers of illegal linear amplifiers to openly advertise their products; many CB dealers include these amplifiers in their catalogs. Other regional cities such as Bendigo, Mildura, Mount Gambier and Port Augusta, developed lively, colourful CB radio communities. The United Kingdom has an additional 40channels between 27.60125 and 27.99125MHz, also making 80channels in total. Operation on frequencies above or below the citizens band (on the "uppers" or "lowers") is called "freebanding" or "outbanding". Legal (shortrange) use of CB radio is sometimes impeded by users of illegal highpower transmitters, which can be heard hundreds of miles away. Even low-power 27MHz signals can sometimes propagate over long distances. The 18channel band plan used 16channels of the 23channel CB radios plus 2extra channels at 27.095 and 27.195MHz, to make up the 18channels. ", "An Indonesian government decision regarding CB, with frequency charts", "QTH.COM: FCC information regarding Illegal CB Radios", https://en.wikipedia.org/w/index.php?title=Citizens_band_radio&oldid=1152673588, Distress, urgency, safety and calling (primary), Distress, urgency, safety and calling (secondary), Commercial operations (ship-shore/ship-ship), Specific events only (ship-shore/ship-ship), Safety/rescue operations (ship-shore/ship-ship), Commercial fishing operations (ship-shore/ship-ship), the first letter (C) is indicated by a grid that contains a set of 40channels. For a particular conversation, everyone must be tuned to the same channel and same mode in order to talk with each other. The original 11 meter amateur radio allocation was 26.96 MHz to 27.23 MHz and it was from this that the original Class D CB service was born. Handheld CBs may use either a telescoping center-loaded whip or a continuously-loaded "rubber ducky" antenna. Hungary allows use of the "low channels" for a total of 80channels (26.515MHz to 27.405MHz). Handle with Care) (1977), and Convoy (1978), made heavy reference to the phenomenon, as did television series such as Movin' On (debuted in 1974), The Dukes of Hazzard (debuted in 1979) and the animated series CB Bears (debuted in 1977) helped cement CB radio's status as a nationwide craze in the United States over the mid- to late-1970s. In Japan, the 2628MHz range is allocated to fishery radio services and these frequencies are heavily used for marine communications. Citizens band is distinct from other personal radio service allocations such as FRS, GMRS, MURS, UHF CB and the Amateur Radio Service ("ham" radio). In the Philippines, up to present time, the use of 27MHz CB is still banned since the Marcos regime banned it in 1980s. Where a nine-foot whip is undesirable, shorter antennas include loading coils to make the antenna impedance the same as a physically longer antenna. Aside from legal CB allocations and freebanding (or outbanding), there are several legal licensed services allocated to this interesting chunk of spectrum. Initially, the FCC intended for CB to be the "poor man's business-band radio", and CB regulations were structured similarly to those regulating the business band radio service. 11 meter is often used by freebanders or CB operators using the "freeband" frequencies from between 25 MHz or 26 MHz and CB channel 1 (26.965 MHz) and CB channel 40 (27.405 MHz) and the bottom edge of the 10 meter amateur band (28.000 MHz). Russian CB allocations follow the CB band 26.96527.405MHz (designated as bandC), as well as 26.51526.955MHz (designated as bandB) and 27.41527.855MHz (designated as bandD). The new RB249 regulations came into effect on January 1, 1978, and the last official registration date for 23channel sets was January 31, 1978. [12]:12 Channel10 was originally often used for highway travel communications east of the Mississippi River, and channel19 west of the Mississippi; channel19 then became the preferred highway channel in most areas, as it did not have adjacent-channel interference problems with channel9. Transmitter power is limited to 4watts in the US and the EU. Frequency Allocations The regulations called for one licence per CB radio. [6] There are several other classes of personal radio services for specialized purposes (such as remote control devices). You will hear these used particularly on the SSB channels. Channel36 (or 38 for LSB) became the unofficial SSB "calling channels" for stations seeking contacts, with the subsequent conversation moving to channels3740. For example, channel"11A" is 27.095MHz, spaced 10kHz after standard channel11 (at 27.085MHz) is used to provide for part of European railroad's Eurobalise radio communication with trains. The original FCC output power limitation for CB radios was "5watts DC input to the final amplifier stage", which was a reference to the earlier radios equipped with tubes. 2200 Meters When it comes to Ham Radio, the only official LF band is 2200 meters. Like many other land mobile radio services, multiple radios in a local area share a single frequency channel, but only one can transmit at a time. In Stephen King's story The Stand, [53]Ralph Brentner's radio signal from Boulder, Colorado was able to be received over CB. CB Action spawned several other popular publications, including a communications and scanning magazine and Amateur Radio Action magazine, produced over several decades and running to some 18volumes. This includes fishing net radio location beacons, paging services, on site or on campus pagers, 26 MHz hospital pagers, telemetry and data link networks, government, military, HF marine and FM land mobile. Superheterodyne receivers (using one or two conversion stages) were the norm in good-quality equipment, although low-cost toy-type units used super-regenerative receivers. Whereas, the bands on the right (11, 15, and 20 Meters) are much narrower (<3% at the design frequency) and can realize a higher gain and still cover the whole band with an SWR <= 1.75:1. SSB radios also have the standard AM mode for communicating with standard CB radio models. 2-Element HF Yagi Design - K7MEM For example, (C9EF, C09EF), behind it an optional designation (E) for "European" or mandatory (R) for "Russian" size frequency nets. Truck drivers still use CB, which is an effective means of obtaining information about road construction, accidents and police speed traps. Novice and Technician licensees outside ITU Region 2 may use CW only between 7.025 and 7.075 MHz and between 7.100 and 7.125 MHz.
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