However voluntary donations are welcome, to cover costs for running and maintaining the system. Internet gateway stations are also beginning to appear; although illegal on 27MHz, these units are connected to other CB stations around the world. [c] It was common for a town to adopt an inter-station channel as its "home" channel. In the United States, the number of users and law enforcement financing by the Federal Communications Commission mean that only the worst offenders are sanctioned, which makes legitimate operation on the citizens band unreliable. 11 meter - HFUnderground Marketing, import and sale of such radios is illegal if they are distributed as anything other than Amateur Radio transceivers. The loading coil may be on the bottom, middle, or top of the antenna, while some antennas are wound in a continuously-loaded helix. [18] On January 1, 1982, the American 40channel band plan was adopted. While some users have moved on to other radio services, CB is still a popular hobby in many countries. At the beginning of the CB radio service, transmitters and receivers used vacuum tubes; solid-state transmitters were not widely available until 1965, after the introduction of RF power-transistors. 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. When UHF CB was first legalised the 27MHz CB Band was intended to be closed to Australian CBers in 1982 and only the 477MHz UHF band was to continue, however this did not eventuate. The FCC simply rounded up the old "5watts DC input to the final amplifier stage" specification to the new "4watts output as measured at the antenna connector on the back of the radio", resulting in a far simpler and easier specification. These radios may have 6 or even 12bands, establishing a set of quasi-CB channels on many unauthorized frequencies. Numbers of channels is commonly minimum 40 (1 band) maximum 240. A short-range simplex radio communications service for recreational use is from 477.5250 to 477.9875MHz FM mode with 38channels and a power output of 500mW. Since the band is right below the 10-meter ham radio band, most HF Ham radios will be able to receive these signals. With these factors in play, CB radio has once again gained popularity in recent years, an uptick not seen since the 90's. The SE-10MB can also be adjusted to operate on the 11 Meter band. Some links may be affiliate links. 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. U. S. "Citizen's Band" (11 Meter Band) Ch. 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. 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. American AM gear has also been exported to Europe. Lax enforcement of the rules on authorized use of CB radio led to widespread further disregard of the regulations (such as for antenna height, distance communications, licensing, call signs, and transmitter power). Truck drivers still use CB, which is an effective means of obtaining information about road construction, accidents and police speed traps. Unlike the 10 Meter Band, access to these frequencies are unrestricted by the FCC, hence the name "Citizen's Band". On 1September 1987 the UK added the usual 40frequencies (26.96527.405MHz) used worldwide, for a total of 80channels at 27MHz; antenna regulations were further relaxed, and the 934MHz band was withdrawn in 1998. Channels24[27.235MHz], 25[27.245MHz], 52[26.675MHz], 53[26.685MHz], 76[26.915MHz, and channel77[26.925MHz], The term "outbanding" was introduced by Kneitel in the August1979 issue of, * GL 226 (VK3PJB) ex-Secretary GL Club, Australia, channel assignments for CB use in the United States, Learn how and when to remove this template message, European Conference of Postal and Telecommunications Administrations, "Fading CB craze signals end to licensing", "Back in view, a First Lady with her own legacy", "Radiocommunications (27MHz Handphone Stations) Class Licence 2015", "Radiocommunications (Maritime Ship Station 27MHz and VHF) Class Licence 2015", "Licensing of General Radio Service Equipment", "Citizens Band (CB) Scanner Frequencies and Radio Frequency Reference", "Arrt du 31 mars 1992 relatif aux caractristiques techniques et aux conditions d'exploitation des postes C.B. 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". 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. e.g. what are some good models of used ham radios that can be converted to 11 meters and work on AM as well as SSB ? For balanced 10-11 meter . In addition, CB may have become a victim of its own popularity; with millions of users on a finite number of frequencies during the mid-to-late 1970s and early 1980s, channels often were noisy and communication difficult, which reduced interest among hobbyists. 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. 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). Two antennas may be installed for symmetrical appearance, with only one connected. Business users (such as tow-truck operators, plumbers, and electricians) moved to the VHF and UHF business band frequencies. [31] This includes a new UHF PMR 446MHz allocation: an eight-channel analog Personal Mobile Radio 446MHz (Analog PMR446) with frequencies from 446.00625 to 446.09375MHz (12.5kHz spacing) FM with 0.5watt power output, and 16channels for Digital Personal Mobile Radio 446MHz (Digital PMR 446). They are also useful in base stations where circumstances preclude the use of a ground-plane antenna. Military HF use [ edit] In the US and Canada, as well as the Americas (ITU Region 2) as a whole, there are no pre-designated HF allocations for military use. Frequency Range: 135.7-137.8 kHz: CW, Phone, Image, RTTY/Data Films such as Smokey and the Bandit (1977), Breaker! FM operations in the 10 meter Amateur Radio Service band are mainly conducted on the spectrum between 29.5~29.7 MHz. Indonesia has the usual 40channels at 27MHz, plus a unique 60-channel allocation from 142.050 to 143.525MHz.[38]. (11). 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.

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