27.415 MHz LSB - US calling/working frequencies (channels +5 kHz, 27.420 MHz, 27.425 MHz, 27.430 MHz, and so on, 27.428 MHz USB - Militia Patriot SSB CB 11m tactical - USB mode 27.428 USB, 27.455 MHz USB - Latin American calling frequency (see also 26.555 MHz LSB) - Spanish language, 27.465 MHz AM - Italian high power channel - canal 45 - similar to 27.025 MHz or 26.705/26.715 MHz in the Americas, 27.500 MHz LSB - Caribbean and Latin American calling/working frequency (see also: 26.225 MHz USB, 26.555 MHz LSB), 27.500 MHz USB - Caribbean and Latin American calling/working frequency, 27.500 MHz AM or CW - unofficial 11 meter, 27.515 MHz LSB - Jamaica and Caribbean calling/DX frequency "The Knight Patrol", 27.555 MHz USB - international 11 meter DX calling frequency, 27.580 MHz USB - Knight Patrol club frequency (see also: 27.515 LSB), 27.605 MHz AM - popular out-of-band trucker channel USA, 27.615 MHz AM - popular out-of-band trucker channel USA, 27.625 MHz AM - popular out-of-band trucker channel USA, 27.635 MHz USB - digital modes found here in Europe (ROS, PSK31), 27.635 MHz AM - CB channel 19 "up one band" - truckers are often heard here (see also 26.735 MHz, 28.085 MHz, 25.635 MHz, 26.285 MHz), 27.665 MHz USB - Spanish language common frequencies + 5 kHz USB/LSB to 27.705 MHz or higher, 27.695 MHz USB - Spanish language, South America popular (also Brazil) - USB and LSB, 27.700 MHz USB - international 11 meter SSTV frequency, 27.735 MHz USB - international 11 meter SSTV frequency (alternate, also digital SSTV), 27.765 MHz FM - Deutsche Welle, German speaking stations out of band freeband, 27.765 MHz USB - Deutsche Welle SSB freebanders, 27.775 MHz AM - sometimes AM signals are heard on this frequency and higher during band openings, often taxi dispatchers, etc, 25330 kHz to 25550 kHz or 25.330 MHz to 25.550 MHz, 26480 kHz to 26950 kHz or 26.480 MHz to 26.950 MHz, 27540 kHz to 28000 kHz or 27.540 MHz to 28.000 MHz, 29890 kHz to 29910 kHz or 29.890 MHz to 29.910 MHz, 30000 kHz to 30560 kHz or 30.000 MHz to 30.560 MHz, 24890 kHz to 24990 kHz or 24.890 MHz to 24.990 MHz, 25005 kHz to 25010 kHz or 25.005 MHz to 25.210 MHz, 25210 kHz to 25330 kHz or 25.210 MHz to 25.330 MHz, 26175 kHz to 26480 kHz or 26.175 MHz to 26.480 MHz, 26950 kHz to 27540 kHz or 26.950 MHz to 27.540 MHz, 28000 kHz to 29700 kHz or 28.000 MHz to 29.700 MHz, 29700 kHz to 29890 kHz or 29.700 MHz to 29.890 MHz, 29910 kHz to 30000 kHz or 29.910 MHz to 30.000 MHz. "Export radios" are sold in the United States as 10meter Amateur Radio transceivers. Where a nine-foot whip is undesirable, shorter antennas include loading coils to make the antenna impedance the same as a physically longer antenna. Citizens band radio (CB) operates on the 11-meter band on 40 channels between 26.965 MHz and 27.405 MHz. The Multi-Use Radio Service is another two-way radio service in the VHF high band. Callbooks have evolved to include online databases that are accessible via the Internet to instantly obtain the address of another amateur radio operator and their QSL managers. The new RB249 regulations came into effect on January 1, 1978, and the last official registration date for 23channel sets was January 31, 1978. Prefix Lists. 27.125 is another very popular frequency for beacons 27.125 beacon 27.125 MHz beacon. MaxOptimizer allows you to choose between a balanced 10 -11 meter antenna that will perform well in both bands or optimize the antenna for the 11 meter band. While some users have moved on to other radio services, CB is still a popular hobby in many countries. Frequencies, power levels and modes (such as frequency modulation (FM), amplitude modulation (AM), and single-sideband modulation (SSB), often vary from country to country; use of foreign equipment may be illegal. Late in 2006, the FCC amended the regulation to exclude only 2628MHz to facilitate amateur 10meter operation. (C9EFM, C9EF, C9EAM, C9EA), 27.144MHz Japanese CB Channel 8 Calling Channel, 27.048MHz Japanese Remote Control R/C Frequency, 27.136MHz Japanese Remote Control R/C Frequency, 27.152MHz Japanese Remote Control R/C Frequency, RF gain: Adjusts the RF amplifier gain of the receiver; used to reduce received background noise, and to reduce "clipping" due to over-amplification of already-strong signals (for example, when the receiver is near the transmitter), NOR / 9 / 19: Quickly tunes preset channels for calling or emergency use, Echo mic: Deliberately introduces distortion and echo into transmitted audio, This page was last edited on 1 May 2023, at 16:35. 27, 27.285 MHz AM - CB channel 28 - AM DX calling channel, see also: 27.025 MHz, etc, 27.315 MHz AM - CB channel 31 - AM DX calling channel (secondary), 27.315 MHz FM - European FM calling channel, 27.355 MHz LSB - CB channel 35 - SSB DX calling channel Australia and Oceania, 27.368 MHz USB - Militia Patriot SSB CB 11m tactical - USB mode 27.368 USB, 27.378 MHz USB - Militia Patriot SSB CB 11m tactical - USB mode 27.378 USB, 27.385 MHz LSB - CB channel 38 - SSB DX calling channel, LSB mode - North American SSB channel (see also: 27.375 LSB, 27.395 LSB). With these factors in play, CB radio has once again gained popularity in recent years, an uptick not seen since the 90's. 11 meter cb radio for sale | eBay Most offenders are not caught for interfering with other CB users; often, their selfmodified equipment generates harmonics and spurs which cause interference to services outside the citizens band and to consumer equipment. Although this band belongs to the same HF as the 10m band, it is often used for FM broadcasting instead of the SSB communication similar to the 10m band. Even low-power 27MHz signals can sometimes propagate over long distances. When looking at the FCC/CEPT channel list there are some channels with a spacing of 20kHz instead of the regular 10kHz step. South Africa also permits use of standard CB channels1927 (27.18527.275MHz) with AM / SSB permitted. . CBers with AM-only radios are asked to not use channels36 through 40. The SE-10MB comes with a UHF connector. [citation needed] Many operators add a switch to change between the "zeroes" (the Russian/Polish channel assignment) and the "fives" (the international/European assignment). Since the band is right below the 10-meter ham radio band, most HF Ham radios will be able to receive these signals. [5] Most of the 460470MHz band was reassigned for business and public-safety use; CB ClassA is the forerunner of the General Mobile Radio Service (GMRS). The club used the prefix "GL" (for Gippsland), since "CB" could not be used. The password you set for your profile. These roughly corresponded to the present channels522, except for the two unique frequencies that are known as 11A (Channel7 on an 18channel Australian CB) and 19A (Channel16 on an 18channel Australian CB) or remote control frequencies but are no longer part of the Australian 27MHz CB band since 40Channels were introduced. In September 2021 the FCC approved the use of FM on CB radio. A Guide to Listening to CB Radio with an RTL-SDR Dongle With the earliest sets two quartz crystals were needed for transmitting and receiving on each channel, which was costly. 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. [40] Lax enforcement enables manufacturers of illegal linear amplifiers to openly advertise their products; many CB dealers include these amplifiers in their catalogs. Before it was banned, they use the same allocation as the US. What the CB community generally refer to as the 11m band or freeband is considered to cover is 25 MHz to the beginning of 28 MHz although most activity happens around 26-28 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). Business users (such as tow-truck operators, plumbers, and electricians) moved to the VHF and UHF business band frequencies. 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). ClassB radios had simpler technical requirements, and were limited to a smaller frequency range. I have own Antron 99 imax2000 Maco v5000 . AnyTone Smart CB Radio Review (2021 Updated) A license from ICASA is required to purchase or use a CB radio in South Africa. He appeared in an interview (with clips having fun talking to children on his home CB radio station) in the NBC Knowledge television episode about CB radio in 1978. The United Kingdom has an additional 40channels between 27.60125 and 27.99125MHz, also making 80channels in total. [14] Most highway travelers monitor channel19. The technology has also given way to more compact CB radios with far more features afforded in older models. Emergency Radio Frequencies - Survival Radios - The Skilled Survivor Login Some hobbyists continue to use the designation "11meters" to refer to the Citizens Band and adjoining frequencies. CB's inventor, Al Gross, made the ceremonial first legal British CB call from Trafalgar Square in London. With amplifiers being illegal to use on a CB, it seems that advertising and selling 11 meter amplifiers could tend to get someone in trouble. The most common description of the channel is considered to be similar to the following: (C9FM or C9EFM or C9EF or 9EF). Since less standardization exists in Europe, CB there is more associated with hobbyists than with truckers. Channel9 is reserved for emergencies, and channel11 for calling. Before CEPT, most member countries used a subset of the 40U.S. channels. It is an unofficial practice to name these channels by their next lower standard channel number along with a suffix"A" (after). [3]:174 On some newer radios, the modification may be as simple as disconnecting a jumper wire or a diode. There was much controversy over whether the Coast Guard should monitor CB radio, but for safety they did so, using Motorola base stations at their search and rescue stations. The current specification is simply "4watts output (AM) or 12watts output (SSB)" as measured at the antenna connector on the back of the radio. Legal (shortrange) use of CB radio is sometimes impeded by users of illegal highpower transmitters, which can be heard hundreds of miles away. Kanava-taajuustaulukko-10-ja-11-metrin-radioille.pdf. The older 23channel radios built under the old specifications typically had an output of around 3.5 to 3.8watts output when measured at the antenna connector. South Africa, like New Zealand and the UK, permits the use of two HF CB bands. CB operators have communicated across thousands of miles and sometimes around the world. Image1. Until 1975,[12]:14 only channels914 and 23[a] could be used for "interstation" calls (to other licensees). This page has been accessed 106,570 times. - The HB9CV Ready for 'The BIG Test Run'. Frequency selection resembles that of modified American CBs more than any foreign frequency plan. These intermediate frequencies are reserved for the Radio Control Radio Service (RCRS). 11DX.net is a privately operated, non-commercial web service for 11 meter operators run by an independent group of 11 meter operators. 11 Meter Global Frequencies | International Sidebanders The loading coil may be on the bottom, middle, or top of the antenna, while some antennas are wound in a continuously-loaded helix. On 27June 2014, changes were made by Ofcom to allow the use of AM & SSB modes on CB in the UK legally for the first time. The normal calling and truckers' channel is channel 19, although many truck organisations and groups use other channels to avoid abuse. CB is the 11 meter band. On UHF 477MHz, citizens band PRS radio devices are allowed 5 watts power output on FM on 39assigned channels spaced at 12.5kHz intervals from 477.0125 to 477.4875MHz. Feel free to login and start using our website to log your contacts on 27MHz. AboutPressCopyrightContact. AM and SSB on the freeband and amplifier use are common among enthusiasts. CB radio in the UK was deregulated in December2006 by the regulatory body Ofcom, and CB radio in the UK is now license-free. "After much consideration, the FCC realized their 1958 decision to strip these frequencies from the. [f] Internet gateways and radio repeaters are allowed on channels 18[27.175MHz] and 23[27.255MHz]. . Part of the 11 m/27 MHz band was also allocated in many countries for early-model cordless phones . CB Radio Base Station Antennas | Long Range CB Antennas CB radios have a range of about 3 miles (4.8km) to 20 miles (32km) depending on terrain, for line of sight communication; however, various radio propagation conditions may intermittently allow communication over much greater distances. e.g. Some links may be affiliate links. 26.955 MHz AM - Channel 40 down one band, popular in USA for local radio nets, 27.025 MHz AM - CB channel 6 - The Superbowl -, 27.085 MHz AM - CB channel 11 - AM DX calling channel - the original calling channel from the 23 channel CB days, 27.125 MHz AM - CB channel 14 - often used as a local AM CB channel, also used for AM CB in Europe and UK, 27.135 MHz AM - Russian Trucker channel (see also 27.135 MHz FM, 27.180 MHz), 27.143 MHz CW - 14RS000 11 meter beacon CB beacon 27145 LSB 27140 USB 27.140 MHz USB 27.14245 MHz, 27.145 MHz LSB - 14RS000 beacon 11m beacon 11 meter beacon 27 MHz CW beacon 27.143 MHz, 27.165 MHz AM - CB channel 17 - often used as an alternate channel to 27.185/channel 19 for truckers, 27.185 MHz AM - CB channel 19 - trucker channel, road channel, interstate highways, probably the best spot to try first, 27.215 MHz AM - CB channel 21 - often used as an alternate channel to 27.185/channel 19 for truckers, 27.235 MHz FM - European packet PSK31 channel - channel 24, 27.235 MHz USB - Swedish and Nordic SSB calling Sweden, 27.235 MHz USB - European digital modes ROS data modes channel, 27.245 MHz FM - European packet PSK31 channel, 27.245 MHz USB - European digital modes ROS data modes channel, 27.255 MHz USB - WSPR weak signal digital modes 11m frequency (confirmed active July 2021), 27.255 MHz CW - 11 meter beacon 27 MHz beacon CB, 27.265 MHz AM - CB channel 26 - AM DX calling channel, see also: 27.025 AM, 27.085 AM, 27.285 AM, 27.275 MHz USB - UK SSB calling England mid band SSB frequency ch. [39] The unofficial "travelers channel" in most of the world is channel19; in Australia it is channel8 (27.055MHz) and UHF channel40 (477.400MHz). If the first letter is not specified, it is considered that it is (C). Shortwave bands - Wikipedia In many countries, CB operation does not require a license, and (unlike amateur radio) it may be used for business or personal communications. Check out our interesting Features and Screenshots. CB band Dipole Antenna for 11 Meters - Half-Wave- with internal 1:1 choke Brand New $69.86 radioman79 (5,253) 100% Buy It Now Free shipping 54 sold Sponsored NEW COBRA 29 LTD CLASSIC CB RADIO New (Other) $143.99 ktinsley5150 (669) 99.3% Was: $179.99 20% off or Best Offer +$33.05 shipping Sponsored Prefix Lists | Tango Mike 11m Band DX Group Under this class assignment, a CB radio is classified as a "Personal Radio Service device". During the 1970s and 1980s peak years of CB radio, many citizens band-themed magazines appeared on newsstands. South Africa has a 23channel AM / SSB 29MHz CB allocation (called "29 Megs" or "29 MHz CB") from 29.710 to 29.985MHz in 12.5kHz steps. TECSUN PL-990 (amzn) SSB - Single Side Band Note: If you want to get a shortwave radio (one with the HF Ham radio bands too) so that you can also listen to the amateur radio Ham bands, most all operators transmit on what is called USB (Upper Side Band) or LSB (Lower Side Band), depending on the specific band. Amateur Radio Service operators record, locate, and report to the FCC frequency trespassing and intrusions of their frequency allocations by pirate transmissions or illegal operators for enforcement action.[45]. [7] CB clubs were formed; a CB slang language evolved alongside ten-code, similar to those used in emergency services. Russia uses an alphanumeric designation for their CB channel plans, because several "grids" or "bands" of 40channels each are used, along with both AM and FM mode. 27MHz radios have the advantage of not requiring a certificate of proficiency to use,[23] however they may not be monitored by rescue organisations or larger vessels. Users on a channel must take turns talking. The recent FCC decision to open the 11-meter band to Class D Citizens Band operation makes it possible for anyone (except those under 18 and aliens) to own and operate a short-wave transmitting and receiving station. Originally, the U.S. had 23CB channels; the 40channel band plan was implemented in 1977. Numbers of channels is commonly minimum 40 (1 band) maximum 240. The terms "interstation" and "intrastation" appear in the FCC's Part95 rules from that time period. The increased use of CB radios in 1970s had made its way into films, television, and music by the late 1970s. Many truckers use two co-phased antennas, mounted on their outside mirrors. New Zealand has adopted the Australian UHF CB System as well.[37]. New Zealand and Japan have unique allocations compared to any other country. The callsign with which you registered. The business band requires an FCC license, and usually results in an assignment to a single frequency. Such an array is intended to enhance performance to the front and back, while reducing it to the sides (a desirable pattern for long-haul truckers). 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. CB ClassB is a more distant ancestor of the Family Radio Service. McCall's "Convoy" and Laurie Lingo & The Dipsticks "Convoy GB" in 1976 (both of which were Top5 hits). Ground-plane kits exist as mounting bases for mobile whips, and have several wire terminals or hardwired ground radials attached. A few operators still illegally utilize the 40CB channels. Guide to 11m DX | Tango Mike 11m Band DX Group After this date, use of unregistered 23channel CB sets was deemed illegal and unlicensed sets were no longer eligible to be licensed. Shortwave And Ham Radio Bands Packet radio is legal in the UK, although not widely used. In return, SSB stations stay off the remaining 35channels so they could be used by AM stations. One AnyTone CB radio review I came across pointed this as an advantage especially if you want to convert the unit into an 11 meter band CB. The Citizens Band, a particular square of radio frequencies (27 MHz or 11 meters) separate from TV and different signs, was made during the 1940s to serve the overall population. 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. Other regional cities such as Bendigo, Mildura, Mount Gambier and Port Augusta, developed lively, colourful CB radio communities. 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. By the late 1960s, advances in solid-state electronics allowed the weight, size, and cost of the radios to fall, giving the public access to a communications medium previously only available to specialists. [18] On January 1, 1982, the American 40channel band plan was adopted. Several channels are allocated for maritime use in Australia. For balanced 10-11 meter . We know that according to the frequency band, the 11-meter band refers to the 25000-28000 kHz or 26-28 MHz / 26000-28000kHz frequency band, and sometimes refers to the 25670 kHz to 26100 kHz. Radios There are a few types of CB type radios available to you. CB linear amplifier type | Electronics Forums In the UK, a small but growing number of people were illegally using American CB radios during the late 1970s and early 1980s. Australian CB radio uses AM, USB, and LSB modes (no FM) on 27MHz, allowed output power being 4Watts AM and 12Watts SSB. Frequency Range: 135.7-137.8 kHz: CW, Phone, Image, RTTY/Data [12]:120 During this early period, many CB radios had "inter-station" channels colored on their dials, while the other channels were clear or normally colored. However, I was listening to a guy on the CB and he said he was a trucker and was using a 10 meter amplifier. This solution also resolves the confusion created by the false advertising that SSB radios have 120channels compared to only 40 for AM radios. Ultra-high frequency (UHF) radios, at the time, were neither practical nor affordable for the average consumer. Early receivers did not cover all the channels of the service; channels were controlled by plug-in quartz crystals, with one of several operating frequencies selected by a panel control in more expensive units. My first attempt at making a CB radio antenna for the 11 meter band. 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". Using radios outside their intended market can be dangerous, as well as illegal, as frequencies used by Citizen's Band radios from other countries may operate on frequencies close to, or be used by, emergency services (for example, the Indonesian service around 142MHz operates on frequencies allocated to a public safety network shared with police, fire and EMS services in Ontario, Canada). Some radios refer to the "mid band" (standard CB band) as "bandD" which shifts the letters up one (making 26.51526.955MHz "bandC" and 27.41527.855MHz "bandE". In Russia, it is channel15 (in addition to traditional emergency channel9 and truckers' channel19), in Greece it is channel13, in Italy it is channel5, all AM. The SE-10MB can also be adjusted to operate on the 11 Meter band. LF11 News. Feel free to cut and paste this list into your favourite word processing or DTP software and produce a chart in any format you like to help whilst DX'ing. In the United States, the following bands are allocated for licensed use in the United States. The 11 meter band is used by both CB radio, as well as freeband unlicensed hobbyists, Church radio broadcasts in Ireland and elsewhere in Europe, the military, for studio-to-transmitter links (STLs), data links, buoys, fishnet tracking systems, pagers and other non-voice purposes . U. S. "Citizen's Band" (11 Meter Band) Ch. These radios may have 6 or even 12bands, establishing a set of quasi-CB channels on many unauthorized frequencies. The European Conference of Postal and Telecommunications Administrations (CEPT) adopted the North American channel assignments, except channel23, frequency 27.235MHz; channel24, frequency 27.245MHz; and channel25, frequency 27.255MHz. Several people had 22A, but few had 22B. To Optimize for 11 meter performance assemble the antenna with the 12" optimizer section installed between the mid and top section as a 4 piece antenna. Since roughly 20052006, Russia and Poland have adopted use of the standard US channel offset as well as the older channel plan, for two overlapping "grids" of channels. Over the next several years antenna regulations were relaxed, with antenna length increasing to 1.65meters (5'5") and centre- or top-loading of the main radiating element permitted. CB has lost much of its original appeal due to development of mobile phones, the internet and the Family Radio Service. The ground radials replace the vehicle body (which is the counterpoise for a mobile whip in a typical vehicle installation). For instance, channel19 shifted two bands up is 28.085MHz, which is in a Morse code / data-only part of the 10meter ham band. CB Radios Citizen Band Radios at CB World 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. what are some good models of used ham radios that can be converted to 11 meters and work on AM as well as SSB ? (11). The advantages of fewer users sharing a frequency, greater authorized output power, clarity of FM transmission, lack of interference by distant stations due to skip propagation, and consistent communications made the VHF (Very High Frequency) radio an attractive alternative to the overcrowded CB channels. A common mobile antenna is a quarter-wave vertical whip. The first 477MHz CB radio in 1977 was designed and made in Australia by Philips TMC and was a 40channel CB called the FM320. Persons using illegal equipment or accessories still risk prosecution, fines or confiscation of equipment, although this is rarely enforced. Citizen band radio is a short distance radio communication system that operates within a selected range of forty channels. Many types of amateur transceivers may be found on CB and freeband, ranging from full-coverage HF transceivers to simpler 10meter mobile radios. 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. [b] After the inter-station/intra-station rule was dropped, channel11 was reserved as a calling frequency (for the purpose of establishing communications); however, this was withdrawn in 1977.