CB
From HFUnderground
(→Origins and Historical Babble) |
(→Origins and Historical Babble) |
||
Line 5: | Line 5: | ||
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). 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. | 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). 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 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. | + | Like the United States and other countries, the German Army operated various versions of these radios, including automatic relay equipment (see SCR-300/BC-1000 VHF-FM 40-48 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. | 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. |
Revision as of 22:31, 22 May 2017
Citizen's Band Radio. 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 of upper-HF. De facto standard frequency allocation based on 40 channel American CB band 26.965-27.405 MHz.
Origins and Historical Babble
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). 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 (see SCR-300/BC-1000 VHF-FM 40-48 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.
The CB service (See also: CB Savage) 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.
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:
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). 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.
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 |
Japan 27MHz Double Side Band DSB Fishery Radio
1W-DSB FISHERY RADIO SERVICE
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 |
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)
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.
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 .
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 |
This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Some links may be affiliate links. We may get paid if you buy something or take an action after clicking one of these.