CB

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Citizen's Band Radio, or "CB Radio" for short. Known by pejorative names such as "Chicken Band", "Children's Band" and several others. Short-range license free (or simple license requirement) two-way radio service for personal or business purposes in the 25-30 MHz (25000-30000 kHz) range that makes up the shortest wavelength portions of the HF band. De facto standard frequency allocation based on 40 channel American CB band 26.965-27.405 MHz. In radio hobbyist circles, the CB band and adjacent frequencies are often referred to as "11 meters".

CB is one of the most commonly used two-way and land mobile radio services worldwide, although for handheld walkie-talkie purposes it has mostly been depreciated in favor of VHF/UHF services such as FRS/GMRS and MURS. CB is still heavily used by trucking companies, hunting clubs, farmers, rednecks, doomsday preppers, etc and as an inexpensive short-range alternative to licensed services such as the business radio service. Many ham radio operators look down on CB with absolute disdain, while others view it as a useful tool...or at the very least, a source of entertainment.

A large radio subculture relating to illegally modifying CB equipment to access "freeband" frequencies, transmit higher than legal power levels, and or make DX contacts, exists worldwide. A large market for "export radios" (often sold under the guise of being 10 meter amateur radios) exists. CB is an old service, with its roots dating back to the 1950s and its spiritual roots dating back to the Second World War.

Contents

Origins and Historical Babble - Second World War

The origins of CB can be traced further back, to World War II. Both the US and Germany developed mobile two-way radios for use in tanks, trucks and other vehicles that used similar frequency ranges, power output levels, and the familiar 9 foot long 1/4 wave "whip" antenna associated with CB. These frequencies the 20-27.9 MHz and 27.0-38.9 MHz ranges (SCR-508 and SCR-608 tank and artillery radios) and the 22.0-33.4 MHz range (Germany, standard 10W.S.c Panzer radio transmitter). The complete German UKW "ultra short wave", another way of saying VHF was known as the Fu 5 or FuG 5. Later German tank radios transmitted high power levels (20 watts vs. 10 watts). This improved radio set was known as the Fu 6 or FuG 6. The German high-HF/low-VHF AM/CW networks provided a communication range of 2-3 km on low power (10w) and 4-6 km on high power (20w).

The American counterparts (SCR-508 family) provided narrower frequency coverage but higher power output and use of FM which significantly reduced impulse noise interference found in vehicles. The SCR-508 tank radio was rated at 25 watts (communication range of 7 miles or 11 km) and the SCR-608 artillery radio was rated at 35 watts (communication range of 15 miles or 24 km). The American radios provided crystal control and channeling at 100 kHz steps (26400, 26500, 26600, etc). The US military also produced lower-powered versions of FM radios that covered the same 20.0-27.9 MHz coverage, designed for mobile command (tank) purposes and landing craft communications.

German AM equipment operated at 50 kHz channel steps (27050, 27100, 27150, etc). The US Army also pioneered the concept of using channel numbers in place of frequencies. For example, 25900 kHz would be referred to as "channel 259". American military equipment provided for 10 crystals to be installed at once and selected "on-the-fly" to allow for rapid frequency agility.

Like the United States and other countries, the German Army operated various versions of these radios, including automatic relay equipment (compare the American SCR-300/BC-1000 VHF-FM 40-48 MHz manpack radio with the German KL.Fuspr.d VHF-AM 32-38 MHz manpack radio) and segregated frequency bands for command and control (in this case, the Germans used a combination of VHF AM/CW tank and command vehicle radios in the 42.0-48.3 MHz range and AM/CW equipment in the 1000-3000 kHz range. Reconnaissance and artillery networks used 24-25 MHz and 23-24.95 MHz AM/CW systems similar in operation to the 22-33.4 MHz panzer tank communications systems. The success of these higher-frequency (above 20 MHz) radio systems for land mobile communications paved the way for the adoption of (what were then considered) higher frequencies for mobile radio.

However, the frequencies used by these military systems was discovered to prone to skywave propagation during the right conditions, including American amateur radio operators intercepting panzer communications while the Germans were operating in North Africa. In addition to being used for tactical communications, the frequency band that would eventually become CB was also used by radar networks such as Chain Home (20-50 MHz) and various radio navigation systems such as the German Lorenz blind landing system (33 MHz), the German "Knickebein" system (30-33 MHz) and others. The British Chain Home system transmitted a continuous "floodlight" radar signal, blanketing the airspace out Great Britain and in many ways, being the first over the horizon radar systems. Chain Home normally operated closer to the lower edge of its frequency capability, often referenced in sources as "12-10 meters" (25-30 MHz).

Origins and Historical Babble - 1950s and beyond

The CB service as we know it today started in the United States in the 1950s as a licensed service in the 26.965-27.255 MHz band (23 channels). When the service was created, the original 26.96 - 27.26 MHz band was taken from the 11 meter amateur radio band. Because of this, CB and its adjacent frequencies are often referred to as "11 meters". CB was expanded in 1977 to 40 channels. It is this 40 channel plan that became the "standard" CB plan that most countries have since adopted.

CB is a HF (generally 26-28 MHz) short-range radio service designed for personal or business use by the general public. Although CB occupies the upper portion of HF, it is intended as a short-range service. 27 MHz generally provides VHF low band-like local propagation characteristics during periods of low sunspot numbers and a lack of sporadic-E propagation. During band openings, however, skip propagation is quite common on CB frequencies, and DXing at modest power levels can be realized.

CB is generally license free worldwide, although frequency allocations, modes and power limits vary from country to country. However, these limits are often ignored and enforcement is extremely lax. Use of "10-meter" or "export" radios is common. These radios offer the user the option of 40 channels plus a band switch, the band switch going up or down 450 kHz (0.450 MHz, or 45 channels). Common export radio frequency coverage includes 25.615-28.305 MHz (standard 6-band export plan), 25.165-28.755 MHz (Galaxy DX radios 8-band plan), 25.615-30.105 MHz ("RU" or "export" plan, often included in European radios and Chinese 10 meter rigs such as the Anytone AT-5555 and its various clones), and 24.265-29.655 MHz (12 meter/10 meter coverage radios such as the Superstar SS-158EDX and its various clones).

Many countries follow the US 40-channel plan, with most of Europe allowing for use of FM on these frequencies in addition to AM. SSB is legal in some parts of the world, in others only AM/FM or even just FM are allowed. The US CB frequency plan has been standardized Europe-wise as the "CEPT" band (or "mid band") in FM mode. Some countries (Germany, Czech Republic, Russia, the UK, New Zealand, etc) have additional channels authorized in addition to the standard 26.965-27.405 MHz US FCC/CEPT "mid band" allocation. Other countries (for example, South Africa, Japan) have entirely different allocations and/or use only a portion of the US FCC/CEPT mid band channel plan. See charts below for CB channel plans.


Team MX-10, a typical multi-norm European AM/FM CB radio. Using the radio's menu, the user selects the country they intend to operate the radio in, and the radio loads the appropriate channel plan.
Galaxy DX 959, a typical AM/SSB "American style" CB radio
Three different versions of the Anytone AT-5555, a 25.615-30.105 MHz all mode "10 meter radio" or "export radio"
GME GX294 an Australian spec 27MHz "Marine CB" radio 27.68-27.98 MHz

Legal Users of 25-30 MHz Spectrum

Aside from legal CB allocations and freebanding (or outbanding), there are several legal licensed services allocated to this interesting chunk of spectrum. This includes paging services, government, military, HF marine and FM land mobile. In the United States, the following bands are allocated for licensed use:

25.070 MHz to 25.121 MHz HF-SSB marine (maritime mobile radio service, 3 kHz steps) - shared with 25020-25320 kHz 25.020 MHz to 25.320 MHz Business/Industrial Radio Service (FM mode, shared with 25070-25121 kHz marine HF SSB) 25.550 MHz to 25.670 MHz Radio Astronomy and is supposed to be clear of stations 25.600 MHz to 26.100 MHz 11 meter shortwave broadcast band SWBC or HFBC band. Rarely used. Some DRM tests done here. 26.145 MHz to 26.175 MHz HF-SSB marine (maritime mobile radio service, 3 kHz steps) 25.870 MHz to 26.470 MHz Remote Broadcast Pickup (Studio Transmitter Link or STL) service 27.430 MHz to 27.530 MHz Business/Industrial Radio Service (20 kHz steps, FM mode) 27.555, 27.615, 27.635, 27.655, 27.765, and 27.860 MHz Forest Products Radio Service on a secondary basis (only in certain areas, with maximum 150 watts output power) 29.710 MHz to 29.790 MHz Business/Industrial Radio Service (20 kHz steps, FM mode)
Frequency Range Remarks

A search of the FCC database reveals the following:

Frequency Remarks
29.790 MHz 4 active licenses, including one repeater system belonging to Van Pool Transportation (WQMA652)
29.770 MHz 4 active licenses, including one repeater system and one high power car service dispatch system in New York City
29.750 MHz 4 active licenses, including two repeater systems and one high power school bus dispatch system
29.730 MHz 1 active license (WQQX896)
29.710 MHz 6 active licenses, including a 1000w repeater system and several high power forestry systems
27.860 MHz 0 active licenses, no previous (expired, canceled, etc) licenses found
27.765 MHz 0 active licenses, no previous (expired, canceled, etc) licenses found
27.655 MHz 0 active licenses, no previous (expired, canceled, etc) licenses found
27.635 MHz 0 active licenses, no previous (expired, canceled, etc) licenses found
27.615 MHz 0 active licenses, no previous (expired, canceled, etc) licenses found
27.555 MHz 0 active licenses, no previous (expired, canceled, etc) licenses found
27.530 MHz 3 active licenses, all less than 5 watts power output
27.510 MHz 2 active licenses, all less than 5 watts power output
27.490 MHz 63 active licenses, high power is authorized on this frequency
27.470 MHz 5 active licenses, specified for itinerant use only per FCC rules
27.450 MHz 5 active licenses, high power is authorized on this frequency
27.430 MHz 5 active licenses, high power is authorized on this frequency
25.870 - 26.470 MHz Hundreds of Remote Broadcast Pickup licenses, often only used for short periods
25.990 MHz 3 active licenses, including WBAP-AM's STL on 25.99 MHz WQGY434 transmitting 300 watts
25.950 MHz 5 active licenses
25.910 MHz 3 active licenses, including WBAP-AM's STL on 25.91 MHz WQGY434 transmitting 300 watts
25.320 MHz 1 active license (WQVJ608)
25.300 MHz 2 active licenses, KA6935 and WPTN464
25.280 MHz 1 active license (WQVJ608)
25.260 MHz 1 active license (SHELL COMMUNICATIONS, INC callsign: KA6935)
25.240 MHz 1 active license (WQVJ608, also licensed for 25.28 MHz, 25.32 MHz, 27.45 MHz, 27.47 MHz)
25.220 MHz 1 active license (SHELL COMMUNICATIONS, INC callsign: KA6935) also 25.26, 25.30
25.200 MHz 0 active licenses
25.180 MHz 4 active oil company licenses, 1 marine HF-SSB shore station license (WPTM574)
25.160 MHz 0 active licenses
25.140 MHz 4 active licenses, all oil companies, all for mobile operations only
25.120 MHz 0 active licenses
25.100 MHz 5 active licenses, oil companies and spill response companies (base stations and mobiles)
25.080 MHz Same licenses as 25.040 MHz / 25040 kHz
25.060 MHz 5 active licenses, all oil companies, all for mobile operations only
25.040 MHz 4 active licenses, including Marine Spill Response Corp WNYA617
25.020 MHz 5 active licenses, all oil companies, all for mobile operations only

CB Channel Plans

The so-called "A channels" are also heavily used, especially when a band opening makes finding a clear frequency difficult. The A channels are assigned to R/C and telemetry purposes in most countries (the USA included). These six frequencies fall under a different section of Part 95 of the FCC rules. 27.255 MHz (CB Channel 23) is also one of the R/C channels, but it is shared with CB. FCC rules permit a maximum of 4 watts carrier power on 26.995 MHz, 27.045 MHz, 27.095 MHz, 27.145 MHz and 27.195 MHz. FCC rules permit a maximum of 25 watts carrier power on 27.255 MHz (this translates to 100 watts PEP at 100% AM modulation). FCC rules provide for FSK and FM modes (for data transmission) as well on 27.255 MHz. Due to the higher power allowed on 27.255 MHz, it is often used for unlicensed on-site paging and telemetry systems. See the bottom of this page for R/C, radio control, remote control, RC, telecommand, telemetry, etc frequencies.

US "FCC" "CEPT" or "mid band" CB Frequencies

AM and SSB Modulation in the Americas, Australia, Asia, FM allowed in Europe and elsewhere

CB Channel Frequency
Channel 1 26.965 MHz
Channel 2 26.975 MHz
Channel 3 26.985 MHz
Channel 4 27.005 MHz
Channel 5 27.015 MHz
Channel 6 27.025 MHz
Channel 7 27.035 MHz
Channel 8 27.055 MHz
Channel 9 27.065 MHz
Channel 10 27.075 MHz
Channel 11 27.085 MHz
Channel 12 27.105 MHz
Channel 13 27.115 MHz
Channel 14 27.125 MHz
Channel 15 27.135 MHz
Channel 16 27.155 MHz
Channel 17 27.165 MHz
Channel 18 27.175 MHz
Channel 19 27.185 MHz
Channel 20 27.205 MHz
Channel 21 27.215 MHz
Channel 22 27.225 MHz
Channel 23 27.255 MHz
Channel 24 27.235 MHz
Channel 25 27.245 MHz
Channel 26 27.265 MHz
Channel 27 27.275 MHz
Channel 28 27.285 MHz
Channel 29 27.295 MHz
Channel 30 27.305 MHz
Channel 31 27.315 MHz
Channel 32 27.325 MHz
Channel 33 27.335 MHz
Channel 34 27.345 MHz
Channel 35 27.355 MHz
Channel 36 27.365 MHz
Channel 37 27.375 MHz
Channel 38 27.385 MHz
Channel 39 27.395 MHz
Channel 40 27.405 MHz


UK CB "27/81" Frequencies

FM (Frequency Modulation)

The UK allows use of the CEPT "mid band" allocation (same as US frequencies) in addition to the frequencies listed below. AM, FM and SSB are allowed on 26.965-27.405 MHz. FM is the only mode allowed on 27.60125-27.99125 MHz. In the UK, these frequencies are shared with the Community Audio Distribution Service (CADS) and the Republic of Ireland's similar service the Wireless Public Address System (WPAS). There does not appear to be specific rules regarding FM deviation or bandwidth. Modern FM CB radios use narrowband FM deviation while older sets may use 5 kHz "wideband" FM.

The 27.6 MHz to 28.0 MHz allocation overlaps with CADS/WPAS and other services in various countries outside the UK.

CB Channel Frequency
Channel 1 27.60125 MHz
Channel 2 27.61125 MHz
Channel 3 27.62125 MHz
Channel 4 27.63125 MHz
Channel 5 27.64125 MHz
Channel 6 27.65125 MHz
Channel 7 27.66125 MHz
Channel 8 27.67125 MHz
Channel 9 27.68125 MHz
Channel 10 27.69125 MHz
Channel 11 27.70125 MHz
Channel 12 27.71125 MHz
Channel 13 27.72125 MHz
Channel 14 27.73125 MHz
Channel 15 27.74125 MHz
Channel 16 27.75125 MHz
Channel 17 27.76125 MHz
Channel 18 27.77125 MHz
Channel 19 27.78125 MHz
Channel 20 27.79125 MHz
Channel 21 27.80125 MHz
Channel 22 27.81125 MHz
Channel 23 27.82125 MHz
Channel 24 27.83125 MHz
Channel 25 27.84125 MHz
Channel 26 27.85125 MHz
Channel 27 27.86125 MHz
Channel 28 27.87125 MHz
Channel 29 27.88125 MHz
Channel 30 27.89125 MHz
Channel 31 27.90125 MHz
Channel 32 27.91125 MHz
Channel 33 27.92125 MHz
Channel 34 27.93125 MHz
Channel 35 27.94125 MHz
Channel 36 27.95125 MHz
Channel 37 27.96125 MHz
Channel 38 27.97125 MHz
Channel 39 27.98125 MHz
Channel 40 27.99125 MHz

German, Czech and Hungarian "Auxiliary" channels 41-80

FM modulation only in Germany, Czech Republic and Hungary. Digital modes allowed on specified channels in Germany. Designated channels 41-80 (channels 1-40 are the US/CEPT standardized channels).

CB Channel Frequency
Channel 41 26.565 MHz
Channel 42 26.575 MHz
Channel 43 26.585 MHz
Channel 44 26.595 MHz
Channel 45 26.605 MHz
Channel 46 26.615 MHz
Channel 47 26.625 MHz
Channel 48 26.635 MHz
Channel 49 26.645 MHz
Channel 50 26.655 MHz
Channel 51 26.665 MHz
Channel 52 26.675 MHz
Channel 53 26.685 MHz
Channel 54 26.695 MHz
Channel 55 26.705 MHz
Channel 56 26.715 MHz
Channel 57 26.725 MHz
Channel 58 26.735 MHz
Channel 59 26.745 MHz
Channel 60 26.755 MHz
Channel 61 26.765 MHz
Channel 62 26.775 MHz
Channel 63 26.785 MHz
Channel 64 26.795 MHz
Channel 65 26.805 MHz
Channel 66 26.815 MHz
Channel 67 26.825 MHz
Channel 68 26.835 MHz
Channel 69 26.845 MHz
Channel 70 26.855 MHz
Channel 71 26.865 MHz
Channel 72 26.875 MHz
Channel 73 26.885 MHz
Channel 74 26.895 MHz
Channel 75 26.905 MHz
Channel 76 26.915 MHz
Channel 77 26.925 MHz
Channel 78 26.935 MHz
Channel 79 26.945 MHz
Channel 80 26.955 MHz

Australian 27 MHz Marine CB

AM mode. 4 watt TX power. Same specifications as AM CB radio. Modern Australian "27 Meg" 27 MHz marine radio equipment usually includes regular US 40-channels in addition to the frequencies below.

27.88 MHz (CH 88) and 27.86 MHz (CH 86) are monitored by coast stations for emergency/distress traffic. 27 MHz marine equipment - often referred to as 27 Megs or 27 Meg radios in Australia - still remain popular for recreational boaters due to licensing and registration requirements to operate on the standard VHF marine band. Many vessels are equipped with dedicated HF-SSB equipment, a stand-alone 27MHz marine radio, and VHF marine equipment, with the 27 MHz gear being used for backup or supplementary purposes. It is due to favorable propagation characteristics over open water that low power 26-30 MHz marine systems remain popular. See the other sections of this article for information regarding 11 meter marine radio bands in other countries.

CB Channel Frequency
Channel 68 27.680 MHz Commercial Boats/Fishing
Channel 72 27.720 MHz Commercial Boats/Fishing
Channel 82 27.820 MHz Commercial Boats/Fishing
Channel 86 27.860 MHz Supplementary Distress/Safety/Calling
Channel 88 27.880 MHz Distress/Safety/Calling
Channel 90 27.900 MHz Non-commercial Boats
Channel 91 27.910 MHz Non-commercial Boats
Channel 94 27.940 MHz Non-commercial Boats, Yacht clubs
Channel 96 27.960 MHz Non-commercial Boats
Channel 98 27.980 MHz Rescue calling/working (supplementary to 27.880 and 27.860 MHz)

New Zealand "CBL" and "CBH" channels

AM and SSB modulation. The CBH channels are the same as the US channels, giving New Zealand a total of 80 HF CB channels. Often referred to as "AM CB" to avoid confusion with the 476-477 MHz "FM CB" UHF CB allocation also in use in New Zealand.

CB Channel Frequency
Channel 1 26.330 MHz
Channel 2 26.340 MHz
Channel 3 26.350 MHz
Channel 4 26.370 MHz
Channel 5 26.380 MHz
Channel 6 26.390 MHz
Channel 7 26.400 MHz
Channel 8 26.420 MHz
Channel 9 26.430 MHz
Channel 10 26.440 MHz
Channel 11 26.450 MHz
Channel 12 26.470 MHz
Channel 13 26.480 MHz
Channel 14 26.490 MHz
Channel 15 26.500 MHz
Channel 16 26.520 MHz
Channel 17 26.530 MHz
Channel 18 26.540 MHz
Channel 19 26.550 MHz
Channel 20 26.570 MHz
Channel 21 26.580 MHz
Channel 22 26.590 MHz
Channel 23 26.620 MHz
Channel 24 26.600 MHz
Channel 25 26.610 MHz
Channel 26 26.630 MHz
Channel 27 26.640 MHz
Channel 28 26.650 MHz
Channel 29 26.660 MHz
Channel 30 26.670 MHz
Channel 31 26.680 MHz
Channel 32 26.690 MHz
Channel 33 26.700 MHz
Channel 34 26.710 MHz
Channel 35 26.720 MHz
Channel 36 26.730 MHz
Channel 37 26.740 MHz
Channel 38 26.750 MHz
Channel 39 26.760 MHz
Channel 40 26.770 MHz

Russian CB Channel Frequencies

Russia as two sets of 120 channels for a total of 240 channels. Unlike most countries, Russia has 5 kHz channel steps. Frequency coverage is 26.510 MHz to 27.855 MHz. Like most other countries, 24-30 MHz is filled with CB and CB-like traffic. Russian taxi cab dispatchers are heard all over Europe in 12 meters through 10 meters during band openings.

AM and FM modulation. SSB used on some frequencies but not allowed. Channels are referred using an alphanumeric designation that provides the band, channel number, and "raster" (last digit of frequency, 5 or 0) plus the mode. Most radios used in Russia use the band letter + channel number format to display channels, and/or include a frequency display due to the complexity of the system. The "E" channels are more commonly used in Russia compared to the older-generation "R" channels (original Russian/Polish/Eastern European CB channel plan).

Common band designations:

B band: 26.515-26.955 MHz (E raster) 26.510-26.950 MHz (R raster) C band: 26.965-27.405 MHz (E raster) 26.960-27.400 MHz (R raster) D band: 27.415-27.855 MHz (E raster) 27.410-27.850 MHz (R raster) + channel number + mode (AM or FM, often written as "A" or "F")

For example, 27.185 MHz FM is designated

C19EF (band C, channel 19, E raster/channeling, FM mode)

Table of channels omitted due to sheer number of channels available. Modern CB radios sold in Europe and Asia often include "RU" mode as a country setting. More often than not, this opens up the radio to 25.615 MHz to 30.105 MHz in 5/10 kHz steps AM/FM mode. Russia suffers from heavy interference on the 10 meter amateur radio band due to the high number of radios operating above and below the legal CB frequencies and nil enforcement on the behalf of Russian authorities. Therefore, the "Russia CB band" can be difficult to pin down as far as the actual frequencies, some sources now simply state "25.610 to 30.120 MHz".

Japan CB Radio Frequencies

AM modulation only. 0.5 watt (500mw) power limit. Often included as part of the Japanese "DSB Fishery Radio Service" (27 MHz fishery radio system) that covers 26.760 MHz to 27.988 MHz in odd steps. Some fishery radio marine frequencies in-between CB channels. Illegal CB operations on the American/Australian frequencies is apparently common in Japan, despite the potential for interference with marine radio service allocations. These frequencies are often used in conjunction with the "standard" 10 kHz CB channeling for fishing, marine transport and other maritime purposes in Japan, Taiwan, China, and several other Asian countries.

CB Channel Frequency
Channel 1 26.968 MHz
Channel 2 26.976 MHz
Channel 3 27.040 MHz
Channel 4 27.080 MHz
Channel 5 27.088 MHz
Channel 6 27.112 MHz
Channel 7 27.120 MHz
Channel 8 27.144 MHz
Frequency Range (kHz) Service Allocation
26760-26944 kHz 1W DSB Fishery Radio Service
26968-26976 kHz Japanese CB channels 1-2
27016 kHz 1W DSB Fishery Radio Service
27040-27144 kHz Japanese CB channels 3-8
27310.5-27470.5 kHz 25W SSB Fishery Radio Service
27524-27980 kHz 1W DSB Fishery Radio Service

Japanese 27MHz Double Side Band DSB Marine Fishery Radio

1W-DSB FISHERY RADIO SERVICE JAPAN

26.760-27.988 MHz. 1 watt maximum carrier power, often overlaid with standard 10 kHz step "marine CB" channeling. See 0.5 watt Japanese CB frequencies above. Not designated channel numbers per Japanese law, referred to by frequency. Radios display frequency and often feature selective calling features. Similar services exist in other Asian countries, with varying frequency allocations. Radios sold in Taiwan covering 26.475-27.275 MHz, others covering 26.065-28.755 MHz, 24.265-29.655 MHz, the de facto standard export 25.615-30.105 MHz or other obvious "overlays" from the standard CB channels. Radios for the 1 watt DSB Fishery Radio Service are still sold as of 2017, despite issues the widespread proliferation of cheaper "export", "10 meter" and "marine CB" equipment. Ranger Communications (RCI) sells "Marine CB" equipment that covers 26.065-28.755 MHz out of the box. The 10 meter band is often plagued by fishery radio interference because of this.


CB Channel Frequency
Channel 26760 26.760 MHz
Channel 26768 26.768 MHz
Channel 26776 26.776 MHz
Channel 26824 26.824 MHz
Channel 26840 26.840 MHz
Channel 26848 26.848 MHz
Channel 26856 26.856 MHz
Channel 26864 26.864 MHz
Channel 26872 26.872 MHz
Channel 26880 26.880 MHz
Channel 26888 26.888 MHz
Channel 26896 26.896 MHz
Channel 26912 26.912 MHz
Channel 26920 26.920 MHz
Channel 26928 26.928 MHz
Channel 26936 26.936 MHz
Channel 26944 26.944 MHz
Channel 27016 27.016 MHz
Channel 27524 27.524 MHz
Channel 27532 27.532 MHz
Channel 27540 27.540 MHz
Channel 27548 27.548 MHz
Channel 27556 27.556 MHz
Channel 27572 27.572 MHz
Channel 27580 27.580 MHz
Channel 27628 27.628 MHz
Channel 27636 27.636 MHz
Channel 27644 27.644 MHz
Channel 27652 27.652 MHz
Channel 27660 27.660 MHz
Channel 27668 27.668 MHz
Channel 27676 27.676 MHz
Channel 27724 27.724 MHz
Channel 27732 27.732 MHz
Channel 27740 27.740 MHz
Channel 27748 27.748 MHz
Channel 27756 27.756 MHz
Channel 27764 27.764 MHz
Channel 27772 27.772 MHz
Channel 27780 27.780 MHz
Channel 27828 27.828 MHz
Channel 27836 27.836 MHz
Channel 27852 27.852 MHz
Channel 27860 27.860 MHz
Channel 27884 27.884 MHz
Channel 27892 27.892 MHz
Channel 27908 27.908 MHz
Channel 27916 27.916 MHz
Channel 27932 27.932 MHz
Channel 27940 27.940 MHz
Channel 27956 27.956 MHz
Channel 27964 27.964 MHz
Channel 27980 27.980 MHz
Channel 27988 27.988 MHz


Japanese 27MHz Single Side Band SSB Marine Fishery Radio

In addition to the 26 / 27 MHz double side band 1W-DSB (1 watt AM) fishery radio service available in Japan, a higher power SSB service exists in the same frequency band. J3E emission, 25 watt power limit (per Japanese regulation). Like the 1W DSB 27MHz marine service, many of these frequencies overlap with the traditional CB bands in use outside of Japan. Frequencies licensed to individual fisheries, just like the 1 watt DSB service, the MF/HF services, the standard VHF marine band, and other UHF bands only available in Japan.

Frequency (kHz) Frequency (MHz)
27310.5 kHz 27.3105 MHz
27334.5 kHz 27.3345 MHz
27338.5 kHz 27.3385 MHz
27342.5 kHz 27.3425 MHz
27346.5 kHz 27.3465 MHz
27350.5 kHz 27.3505 MHz
27354.5 kHz 27.3545 MHz
27358.5 kHz 27.3585 MHz
27362.5 kHz 27.3625 MHz
27366.5 kHz 27.3665 MHz
27370.5 kHz 27.3705 MHz
27378.5 kHz 27.3785 MHz
27382.5 kHz 27.3825 MHz
27386.5 kHz 27.3865 MHz
27388.5 kHz 27.3885 MHz
27398.5 kHz 27.3985 MHz
27404.5 kHz 27.4045 MHz
27418.5 kHz 27.4185 MHz
27426.5 kHz 27.4265 MHz
27434.5 kHz 27.4345 MHz
27442.5 kHz 27.4425 MHz
27452.5 kHz 27.4525 MHz
27458.5 kHz 27.4585 MHz
27466.5 kHz 27.4665 MHz
27470.5 kHz 27.4705 MHz


Republic of Korea / South Korea Fishery Radio 27 MHz

South Korea allows use of the 26.965-27.405 MHz "Citizen Radio" allocation in addition to 27.400 MHz (27.402 MHz offset also allowed), 27.410 MHz, 27.420 MHz (27.422 MHz offset frequency also permitted) and 27.440 MHz for paging purposes.


Frequency (kHz) Frequency (MHz) Designated Use in Korea
27508 kHz 27.508 MHz Fishery Radio - Ship to Ship Maritime Mobile
27516 kHz 27.516 MHz Fishery Radio - Ship to Ship Maritime Mobile
27544 kHz 27.544 MHz Fishery Radio - Ship to Ship Maritime Mobile
27552 kHz 27.552 MHz Fishery Radio - Ship to Ship Maritime Mobile
27560 kHz 27.560 MHz Fishery Radio - Ship to Ship Maritime Mobile
27581 kHz 27.581 MHz Fishery Radio - Ship to Ship Maritime Mobile
27598 kHz 27.598 MHz Fishery Radio - Ship to Ship Maritime Mobile
27768 kHz 27.552 MHz Fishery Radio - Ship to Ship Maritime Mobile
27776 kHz 27.776 MHz Fishery Radio - Ship to Ship Maritime Mobile
27895 kHz 27.895 MHz Fishery Radio - Ship to Ship Maritime Mobile
27911 kHz 27.911 MHz Fishery Radio - Ship to Ship Maritime Mobile
27919 kHz 27.919 MHz Fishery Radio - Ship to Ship Maritime Mobile
27927 kHz 27.927 MHz Fishery Radio - Ship to Ship Maritime Mobile
27935 kHz 27.935 MHz Fishery Radio - Ship to Ship Maritime Mobile
27943 kHz 27.943 MHz Fishery Radio - Ship to Ship Maritime Mobile
27789 kHz 27.789 MHz Fishery Radio - Fisheries Radio Shore-to-Ship
27805 kHz 27.805 MHz Fishery Radio - Fisheries Radio Shore-to-Ship
27821 kHz 27.821 MHz Fishery Radio - Distress Safety Calling Emergency Frequency
27837 kHz 27.837 MHz Fishery Radio - Fisheries Radio Shore-to-Ship
27856 kHz 27.856 MHz Fishery Radio - Fisheries Radio Shore-to-Ship
27869 kHz 27.869 MHz Fishery Radio - Fisheries Radio Shore-to-Ship
27885 kHz 27.885 MHz Fishery Radio - Fisheries Radio Shore-to-Ship

South Africa (27 MHz CB)

AM and SSB (USB only). 9 channels, 27.185-27.275 MHz.

CB Channel Frequency
Channel 19 27.185 MHz
Channel 20 27.205 MHz
Channel 21 27.215 MHz
Channel 22 27.225 MHz
Channel 23 27.255 MHz
Channel 24 27.235 MHz
Channel 25 27.245 MHz
Channel 26 27.265 MHz
Channel 27 27.275 MHz

South Africa (29 MHz CB)

AM on all channels. SSB only allowed on specified channels. 23 channels, 29.710 MHz - 29.985 MHz. 12.5 kHz steps. Some channels have multiple designations depending on their intended use. Used by boating clubs, 4x4 groups, farmers, etc. South African 4x4 groups are starting to migrate to VHF/UHF services but a 29 MHz CB appears to still be required equipment for many of these clubs (much like a 27 MHz CB is required by Jeep and 4x4 clubs in the US and UK).

29 MHz CB marine usage in South Africa is analogous to 27 MHz marine CB usage in Australia. It remains in use by recreational boats, often in conjunction with VHF marine equipment on recreational and fishing boats. Only 3 channels are available for marine use under South African law, 29.935 MHz (29 MHz marine channel 1 or channel A), 29.7725 MHz (29 MHz marine channel 2 or channel B) and 29.9725 MHz (29 MHz marine channel 3 or channel C).

CB Channel Frequency
Channel 1 29.7100 MHz AM - General Purpose
Channel 2 29.7225 MHz AM - General Purpose
Channel 3 29.7350 MHz AM - General Purpose
Channel 4 29.7475 MHz AM/SSB - Civil Defense Channel 2
Channel 5 29.7600 MHz AM - General Purpose
Channel 6 29.7725 MHz AM - Marine Channel 2/B
Channel 7 29.7850 MHz AM - General Purpose
Channel 8 29.7975 MHz AM - General Purpose
Channel 9 29.8100 MHz AM - General Purpose
Channel 10 29.8225 MHz AM/SSB - Civil Defense Channel 2
Channel 11 29.8350 MHz AM - General Purpose
Channel 12 29.8475 MHz AM/SSB - Civil Defense Channel 1
Channel 13 29.8600 MHz AM - General Purpose
Channel 14 29.8725 MHz AM - General Purpose
Channel 15 29.8850 MHz AM - General Purpose
Channel 16 29.8975 MHz AM - General Purpose
Channel 17 29.9100 MHz AM - General Purpose
Channel 18 29.9225 MHz AM/SSB - Civil Defense Channel 5
Channel 19 29.9350 MHz AM - Marine Channel 1/A
Channel 20 29.9475 MHz AM/SSB - Civil Defense Channel 3
Channel 21 29.9600 MHz AM - General Purpose
Channel 22 29.9725 MHz AM - Marine Channel 3/C
Channel 23 29.9850 MHz AM/SSB - Civil Defense Channel 6

India 27 channel 27MHz CB

AM and FM modes allowed. 5 watt maximum transmit power, no limit on antenna gain. Unclear if SSB is permitted. 26.96-27.28 MHz. Several VHF and UHF services are allowed in India for two-way radio, making 26 MHz/27 MHz CB radio a bit of a niche. However, so-called multi-norm AM/FM CB radios are beginning to be shipped with the Indian band programmed in as one of the country modes the user may select.

CB Channel Frequency
Channel 1 26.965 MHz
Channel 2 26.975 MHz
Channel 3 26.985 MHz
Channel 4 27.005 MHz
Channel 5 27.015 MHz
Channel 6 27.025 MHz
Channel 7 27.035 MHz
Channel 8 27.055 MHz
Channel 9 27.065 MHz
Channel 10 27.075 MHz
Channel 11 27.085 MHz
Channel 12 27.105 MHz
Channel 13 27.115 MHz
Channel 14 27.125 MHz
Channel 15 27.135 MHz
Channel 16 27.155 MHz
Channel 17 27.165 MHz
Channel 18 27.175 MHz
Channel 19 27.185 MHz
Channel 20 27.205 MHz
Channel 21 27.215 MHz
Channel 22 27.225 MHz
Channel 23 27.255 MHz
Channel 24 27.235 MHz
Channel 25 27.245 MHz
Channel 26 27.265 MHz
Channel 27 27.275 MHz

Brazilian "high band" channels 41-80

AM and SSB allowed. Up to 25 watts output power. 27.415-27.855 MHz high band or "uppers". Channels 1-40 are the same as the US FCC/CEPT channels. The frequencies 27.445 MHz, 27.495 MHz, 27.545 MHz, 27.595 MHz and 27.645 MHz are skipped in this channel plan. They are, however, still heavily used in Brazil and elsewhere in Latin America.

CB Channel Frequency
Channel 41 27.415 MHz
Channel 42 27.425 MHz
Channel 43 27.435 MHz
Channel 44 27.455 MHz
Channel 45 27.465 MHz
Channel 46 27.475 MHz
Channel 47 27.485 MHz
Channel 48 27.505 MHz
Channel 49 27.515 MHz
Channel 50 27.525 MHz
Channel 51 27.535 MHz
Channel 52 27.555 MHz
Channel 53 27.565 MHz
Channel 54 27.575 MHz
Channel 55 27.585 MHz
Channel 56 27.605 MHz
Channel 57 27.615 MHz
Channel 58 27.625 MHz
Channel 59 27.635 MHz
Channel 60 27.655 MHz
Channel 61 27.665 MHz
Channel 62 27.675 MHz
Channel 63 27.685 MHz
Channel 64 27.695 MHz
Channel 65 27.705 MHz
Channel 66 27.715 MHz
Channel 67 27.725 MHz
Channel 68 27.735 MHz
Channel 69 27.745 MHz
Channel 70 27.755 MHz
Channel 71 27.765 MHz
Channel 72 27.775 MHz
Channel 73 27.785 MHz
Channel 74 27.795 MHz
Channel 75 27.805 MHz
Channel 76 27.815 MHz
Channel 77 27.825 MHz
Channel 78 27.835 MHz
Channel 79 27.845 MHz
Channel 80 27.855 MHz

27 MHz 11 meter band CB Repeaters

25-30 MHz simplex echo parrot CB repeaters, mostly operating in the 26 MHz and 27 MHz CB bands (Russian bands). Commonly referred to as "parrots" or "echo repeaters" these are simplex repeaters (store-and-forward). Due the easy availability and low prices of these devices, 11-meter repeaters are becoming more and more popular, especially in parts of the world where FM mode is allowed/used in addition to AM/SSB. Russia is the heaviest user of CB repeaters, due to its large size, heavy reliance on CB for the taxi, delivery, trucking and roadside assistance industries.

All listed repeaters operate in FM mode. The vast majority are carrier squelch, however some require a CTCSS tone (usually 77.0Hz or 88.5Hz) to open the repeater and/or access cross-band links. If any CTCSS/PL tone is known, it is included with the repeater listing.

CB Repeater Networks Crossband Link to VHF/UHF Systems and Internet Services

Several of these repeaters operate as part of larger "networks" or "systems" linked together via the Internet or VHF / UHF Radio services such as PMR446, LPD433, FRS, GMRS, MURS or other country-specific systems. It appears that the most popular crossband links are in the 433.075-434.775 MHz LPD433 service in Russia and the 446.0-446.2 MHz PMR446 service elsewhere in Europe In the Americas, both the UHF FRS and GMRS services and the VHF MURS services have been used to link CB repeaters.

Cross band repeat and links sometimes operate on unlicensed frequencies and/or operate with higher-than-legal power levels within legal frequencies. For example, maximum power output on LPD433 is 10mW, however several Russian 27 MHz repeaters are using modified high power amateur radios on the LPD433 frequencies as part of their linking system. Other linking systems used modified 43 MHz Italian "VHF CB" equipment such as the Alan HM43, Intek/Dragon SY-5430 which is popular in Russia and the CIS nations for its capability to be easily modified to cover 42.3000 MHz to 45.0875 MHz at 25w output power.

CB Repeater Listing

Three repeaters on this list are true split-frequency systems:

Output Frequency Input Frequency Location Remarks
26.565 MHz 27.405 MHz Germany CH41 output/CH40 input (German 80-channel CB)
27.085 MHz 27.175 MHz Netherlands Multiple TX/RX sites, each site assigned a CW ID transmitted at the end of transmission
27.620 MHz 27.820 MHz Jamaica Optional CTCSS tone: 88.5Hz


Due to the nature of these simplex repeaters being hobbyist owned/operated, this list is likely, and is likely to remain, incomplete. the repeaters listed below may switch frequencies or temporarily go off the air please update this list with any new information regarding frequencies, transmit location or transmit power for entries missing this information.

Below is a list of confirmed [as of December 2016] CB repeaters and their location (if known).

Frequency Location Remarks
26.565 MHz Germany Output (input 27.405 MHz)
26.575 MHz Germany
26.675 MHz
26.685 MHz Western Russia
26.715 MHz Chelyabinsk, Russia
26.915 MHz
26.925 MHz
26.935 MHz
26.970 MHz Poland (multiple sites)
26.970 MHz Russia (multiple sites)
26.970 MHz Lithuania
26.975 MHz Samara, Russia 10 watt TX power
26.985 MHz Samara, Russia 10 watt TX power
26.985 MHz Tver, Russia
26.985 MHz Sweden At least two sites (see also 27.205 MHz FM)
27.000 MHz Kiev, Ukraine
27.005 MHz Yekaterinburg (Ekaterinburg), Russia
27.015 MHz Moscow, Russia (multiple sites)
27.015 MHz Samara, Russia 10 watt TX power
27.015 MHz Naro-Fominsk, Russia
27.030 MHz Minsk, Belarus
27.030 MHz Shymkent, Kazakhstan
27.035 MHz Kiev, Ukraine 4 watt TX power
27.040 MHz Minsk, Belarus
27.060 MHz Kiev, Ukraine
27.070 MHz
27.075 MHz Eastern Russia
27.085 MHz Altai Region, South-Central Russia
27.085 MHz Netherlands (several locations) Simplex, each location ends transmission with single letter CW ID
27.085 MHz Netherlands (several locations) Output (input 27.175 MHz), each location has unique end of transmission CW ID
27.100 MHz Gomel, Belarus 100 watt TX power
27.100 MHz Krasnodar, Russia
27.105 MHz Ulyanovsk, Russia 4 watt TX power
27.105 MHz Astana, Kazakhstan
27.110 MHz Poland
27.110 MHz Russia
27.135 MHz Moscow, Russia
27.150 MHz Poland
27.165 MHz Issyk, Kazakhstan
27.170 MHz Poland
27.170 MHz Russia (multiple sites)
27.175 MHz Taraz, Kazakhstan
27.175 MHz Netherlands (several locations) Input (Output 27.085 MHz), each location has unique end of transmission CW ID
27.180 MHz Multiple sites Eastern Europe/Russia
27.185 MHz Multiple sites Eastern Europe/Russia
27.190 MHz
27.200 MHz Zaykova, Russia
27.205 MHz Sweden DTMF-activated playback
27.205 MHz Russia (multiple sites)
27.210 MHz Zhukovsky (Moscow Oblast), Russia
27.215 MHz Almaty, Kazakhstan
27.215 MHz Russia (multiple sites)
27.220 MHz
27.225 MHz Altai Region, South-Central Russia
27.230 MHz
27.235 MHz
27.240 MHz Moscow, Russia 10 watt TX power, 5/8 wave vertical antenna
27.245 MHz Almaty, Kazakhstan 12 watt TX power, 1/2 wave vertical antenna
27.250 MHz Belarus
27.255 MHz Kiev, Ukraine 4 watt TX power
27.260 MHz Krivoi Rog (Kryvyi Rih), Ukraine
27.260 MHz Moscow, Russia 10 watt TX power, 5/8 wave vertical antenna
27.270 MHz Saratov, Russia
27.270 MHz Kiev, Ukraine
27.275 MHz Kemerovo, Russia Cross-band link to 434.500 MHz
27.275 MHz Russia (several other sites)
27.290 MHz Minsk, Belarus
27.295 MHz Tyumen, Russia
27.300 MHz
27.305 MHz Western Europe
27.315 MHz Russia (multiple sites)
27.325 MHz
27.330 MHz Saratov, Russia Located on Sokolova Mountain (wide coverage area)
27.335 MHz Almaty, Kazakhstan
27.355 MHz St. Petersburg, Russia
27.370 MHz Western Russia
27.375 MHz Vladivostok, Russia
27.390 MHz Kaliningrad, Russia 10 watt TX power, 5/8 wave vertical antenna
27.395 MHz Netherlands President Grant II RX/TX Radio
27.405 MHz Germany Input to 26.565 MHz
27.415 MHz Yekaterinburg (Ekaterinburg), Russia
27.425 MHz Rostov, Russia CTCSS 88.5Hz Cross-band link to 434.575 MHz CTCSS 77.0Hz
27.430 MHz
27.450 MHz
27.455 MHz Yekaterinburg (Ekaterinburg), Russia
27.470 MHz
27.505 MHz Moscow, Russia
27.515 MHz Obninsk (Kaluga Oblast), Russia
27.580 MHz Moscow, Russia
27.605 MHz Kazan, Russia CTCSS 88.5Hz, Alinco DR-03T 10 watt transmitter with UHF link
27.605 MHz Moscow, Russia
27.620 MHz Jamaica Output (input 27.820 MHz CTCSS 88.5Hz)
27.625 MHz Russia (multiple locations)
27.630 MHz Moscow, Russia
27.635 MHz Moscow, Russia
27.635 MHz St. Petersburg, Russia
27.650 MHz Western Europe
27.665 MHz Moscow, Russia 5/8 wave vertical antenna
27.675 MHz Russia
27.765 MHz Germany
27.820 MHz Jamaica Input CTCSS 88.5Hz (output 27.620 MHz)
27.840 MHz Poland
27.875 MHz Rostov, Russia


US "A" or "RC" channels

These frequencies are used throughout the world, often in conjunction with locally authorized frequencies. In the United States, 27.255 MHz (CB Channel 23) is shared with telecommand/telemetry systems in addition to RC. Paging and local telemetry systems often use 27.255 MHz because FCC rules permit high power transmission on this frequency. Maximum carrier power is 25 watts on 27.255 MHz (which equates to 100 watts PEP). Ref FCC Rules Part 95 95.207 and 95.210 47CFR95.207 and 47CFR95.210 Local paging systems, on-site telemetry, lightning detector systems, and wireless PA systems have been reported to use 27.255 MHz. During band openings, paging signals can often be heard on 27.255MHz.

For example, the Linear Xtended Range data transmitter system uses FM-FSK on 27.255 MHz with 10 watts carrier power and 6 kHz bandwidth under Part 95. Radioshack used to sell an on-site paging system that transmitted FM POCSAG on 27.255 MHz with 7 watts carrier power. 27.255 MHz (channel 23) offers surprisingly long range at higher power levels with quality antenna systems. With a 27255 kHz transmitter doing 10-20 watts carrier power and a strategically placed transmitter, one could cover a substantial portion of an urbanized area. Testing with 10 watt carrier power FSK transmitters on 27.255 MHz using base station CB antennas showed ranges of 20+ miles with very little loss in signal strength and no data loss.

CB Channel RC Channel RC Color Code Frequency
Channel "3A" Channel 1 Brown 26.995 MHz
Channel "7A" Channel 2 Red 27.045 MHz
Channel "11A" Channel 3 Orange 27.095 MHz
Channel "15A" Channel 4 Yellow 27.145 MHz
Channel "19A" Channel 5 Green 27.195 MHz
Channel 23 Channel 6 Blue 27.255 MHz

UK RC Channels

RC Color Code Frequency
Black 26.975 MHz
Brown 26.995 MHz
Brown-Red 27.025 MHz
Red 27.045 MHz
Red-Orange 27.075 MHz
Orange 27.095 MHz
Orange-Yellow 27.125 MHz
Yellow 27.145 MHz
Yellow-Green 27.175 MHz
Green 27.195 MHz
Green-Blue 27.225 MHz
Blue 27.245 MHz
White (or Purple) 27.275 MHz


Australian 27 MHz and 29MHz RC Channels

Australia RC Channel Frequency
Channel 1 26.995 MHz
Channel 2 27.045 MHz
Channel 3 27.095 MHz
Channel 4 27.145 MHz
Channel 6 27.195 MHz
Channel 10 29.725 MHz
Channel 11 29.735 MHz
Channel 12 29.745 MHz
Channel 13 29.755 MHz
Channel 14 29.765 MHz
Channel 15 29.775 MHz
Channel 16 29.785 MHz
Channel 17 29.795 MHz
Channel 18 29.805 MHz
Channel 19 29.815 MHz
Channel 20 29.825 MHz
Channel 21 29.835 MHz
Channel 22 29.845 MHz
Channel 23 29.855 MHz
Channel 24 29.865 MHz
Channel 25 29.875 MHz
Channel 26 29.885 MHz
Channel 27 29.895 MHz
Channel 28 29.905 MHz
Channel 29 29.915 MHz
Channel 30 29.925 MHz
Channel 31 29.935 MHz
Channel 32 29.945 MHz
Channel 33 29.955 MHz
Channel 34 29.965 MHz
Channel 35 29.975 MHz
Channel 36 29.985 MHz

New Zealand 27 MHz and 29MHz RC Channels

Similar to American and Australian RC frequency allocations. Different channel numbering system. 26.975-27.280 MHz and 29.725-29.985 MHz. 20 kHz channel steps 29.7-30 MHz instead of 10 kHz steps like the Australian system.

NZ RC Channel Frequency
Channel 197 26.975 MHz
Channel 199 26.995 MHz
Channel 102 27.020 MHz
Channel 104 27.045 MHz
Channel 107 27.070 MHz
Channel 109 27.095 MHz
Channel 112 27.120 MHz
Channel 114 27.145 MHz
Channel 117 27.170 MHz
Channel 119 27.195 MHz
Channel 122 27.220 MHz
Channel 124 27.245 MHz
Channel 128 27.280 MHz
Channel 272 29.725 MHz
Channel 274 29.745 MHz
Channel 276 29.765 MHz
Channel 278 29.785 MHz
Channel 280 29.805 MHz
Channel 282 29.825 MHz
Channel 284 29.845 MHz
Channel 286 29.865 MHz
Channel 288 29.885 MHz
Channel 290 29.905 MHz
Channel 292 29.925 MHz
Channel 294 29.945 MHz
Channel 296 29.965 MHz
Channel 298 29.985 MHz
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