11 meter

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(Freeband 11 Meter Frequencies and Bands)
(Freeband 11 Meter Frequencies and Bands)
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*27.515 MHz LSB - Jamaica and Caribbean calling/DX frequency "The Knight Patrol"  
*27.515 MHz LSB - Jamaica and Caribbean calling/DX frequency "The Knight Patrol"  
*27.555 MHz USB - international 11 meter DX calling frequency
*27.555 MHz USB - international 11 meter DX calling frequency
-
*'''27.60125 MHz - 27.99125 MHz''' - UK FM 27/81 CB (UK only) also CADS/WPAS Channels LW01-LW40 UK, Ireland (AM/FM modes, Church broadcasts)
+
*'''27.60125 MHz - 27.99125 MHz''' - UK FM 27/81 CB (UK only) also CADS/WPAS Channels LW01-LW40 UK, Ireland (AM/FM modes, Church broadcasts) straight 10 kHz channel steps
-
*'''27.605 MHz - 27.995 MHz''' - [[Community_Audio_Distribution_Service|CADS/WPAS]] Channels UW01-UW40 UK, Ireland and elsewhere
+
*'''27.605 MHz - 27.995 MHz''' - [[Community_Audio_Distribution_Service|CADS/WPAS]] Channels UW01-UW40 UK, Ireland and elsewhere straight 10 kHz channel steps
*27.635 MHz USB - digital modes found here in Europe (ROS, PSK31), see also 27.235 MHz and 27.245 MHz
*27.635 MHz USB - digital modes found here in Europe (ROS, PSK31), see also 27.235 MHz and 27.245 MHz
*27.635 MHz AM - CB channel 19 "up one band" - truckers are often heard here (see also 26.735 MHz)
*27.635 MHz AM - CB channel 19 "up one band" - truckers are often heard here (see also 26.735 MHz)

Revision as of 15:49, 23 January 2019

The 11 meter band is used by both CB radio, as well as freeband unlicensed hobbyists, Church radio broadcasts in Ireland and elsewhere in Europe, the military, data links, buoys, fishnet tracking systems, pagers and other non-voice purposes.

11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz. It may also refer to the basically never-used 11 meter shortwave broadcast band 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz. The original 11 meter amateur radio allocation was 26.96 MHz to 27.23 MHz and it was from this that the original Class D CB service was born.

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 in the United States:

Frequency Range MHz Frequency Range kHz Remarks
24.990 MHz to 25.010 MHz 24990 kHz to 25010 kHz Time and Frequency Standard Stations - WWV on 25.000 MHz 25MHz 25000 kHz operates here
25.020 MHz to 25.320 MHz 25020 kHz to 25320 kHz Business/Industrial Radio Service (FM mode, shared with 25070-25121 kHz marine HF SSB)
25.070 MHz to 25.121 MHz 25070 kHz to 25121 kHz HF-SSB marine (maritime mobile radio service, 3 kHz steps) - shared with 25020-25320 kHz
25.330 MHz to 25.550 MHz 25330 kHz to 25550 kHz Government and Military Fixed/Mobile
25.550 MHz to 25.670 MHz 25550 kHz to 25670 kHz Radio Astronomy and is supposed to be clear of stations
25.600 MHz to 26.100 MHz 25600 kHz to 26100 kHz 11 meter shortwave broadcast band SWBC or HFBC band. Rarely used. Some DRM tests done here.
26.145 MHz to 26.175 MHz 26145 kHz to 26175 kHz HF-SSB marine (maritime mobile radio service, 3 kHz steps)
25.870 MHz to 26.470 MHz 25870 kHz to 26470 kHz Remote Broadcast Pickup (Studio Transmitter Link or STL) service (overlaps with 11 meter broadcast band and HF marine)
26.480 MHz to 26.950 MHz 26480 kHz to 26950 kHz Government and Military Fixed/Mobile
26.950 MHz to 26.960 MHz 26950 kHz to 26960 kHz Internationally allocated fixed (center frequency: 26.955 MHz 26955 kHz, often used for data links)
26.957 MHz to 27.283 MHz 26957 kHz to 27283 kHz ISM Band (27.120 MHz +/- 163 kHz)
26.960 MHz to 27.280 MHz 26960 kHz to 27280 kHz Part 15 devices (see also: ISM devices and remote control or data link systems using higher power)
26.960 MHz to 27.410 MHz 26960 kHz to 27410 kHz Citizen's Band Radio Service - US CB Radio FCC allocation 40 channels + 5 R/C data channels 10 kHz steps
27.430 MHz to 27.540 MHz 27410 kHz to 27540 kHz Business/Industrial Radio Service (20 kHz steps, FM mode)
27.540 MHz to 28.000 MHz 27540 kHz to 28000 kHz Government and Fixed/Mobile
28.000 MHz to 29.700 MHz 28000 kHz to 29700 kHz Amateur Radio Ham Radio 10 Meter Band
29.710 MHz to 29.790 MHz 29710 kHz to 29790 kHz Business/Industrial Radio Service (20 kHz steps, FM mode)
29.800 MHz to 30.550 MHz 29800 kHz to 30550 kHz Government and Military Fixed/Mobile


11 meter is often used by freebanders or CB operators using the "freeband" frequencies from between 25 MHz and CB channel 1 (26.965 MHz) and CB channel 40 (27.405 MHz) and the bottom edge of the 10 meter amateur band (28.000 MHz). Common freeband frequencies include:

Freeband 11 Meter Frequencies and Bands

  • 25.615 MHz - 26.055 MHz - Band A - often used by taxi cabs and trucking companies (AM mode in the Americas, AM or FM elsewhere)
  • 25.835 MHz AM - CB channel 19 "down three bands" - truckers are often heard here
  • 26.065 MHz - 26.505 MHz - Band B - often used by taxi cabs, trucking companies and hunting clubs
  • 26.225 MHz USB - Latin American SSB activity
  • 26.285 MHz USB - 26 MHz international calling frequency (commonly used in Europe)
  • 26.285 MHz AM - CB channel 19 "down two bands" - truckers are often heard here
  • 26.305 MHz AM - truckers, often heard in North America during band openings
  • 26.385 MHz AM - truckers, taxis, etc.
  • 26.405 MHz AM - another commonly active frequency
  • 26.515 MHz - 26.955 MHz - Band C - "low band" or "lowers" all sorts of users, AM in the Americas, mixture of AM and FM elsewhere
  • 26.515 MHz AM - active in southern USA
  • 26.555 MHz LSB - very active in Mexico and Central/South America (and Caribbean)
  • 26.565 MHz - 26.955 MHz - German CB channels 41-80, FM mode only, heavily used in Europe
  • 26.585 MHz AM - Mexican trucker channel, often very busy
  • 26.605 MHz AM - alternate to 26.585 MHz (see also, 26.575 MHz, 26.595 MHz)
  • 26.705 MHz AM - Puerto Rico, Florida and other Caribbean AM stations, often extremely powerful
  • 26.715 MHz AM - alternate to 26.705 MHz
  • 26.725 MHz AM - alternate to 26.705 MHz and 26.715 MHz
  • 26.735 MHz AM - CB channel 19 "down one band" - truckers are often heard here (see also 27.635 MHz)
  • 26.755 MHz AM - often active in southern USA + every 10 kHz to 26.955 MHz
  • 26.775 MHz AM - often active in southern USA (channel 22 down one band - 27.225 MHz - .450 MHz)
  • 26.815 MHz AM - CB channel 26 down one band (active during band openings)
  • 26.835 MHz AM - CB channel 28 down one band (similar to 26.815 MHz, 26.905 MHz, 26.915 MHz, etc)
  • 26.885 MHz AM - alternate to 26.915 MHz, others
  • 26.905 MHz AM - alternate to 26.915 MHz, others
  • 26.915 MHz AM - Big radios USA "915" channel 36 down one band, AM DX channel
  • 26.965 MHz - 27.405 MHz - Band D - legal CB band - "mid band", "FCC band" or "CEPT" band
  • 27.025 MHz AM - CB channel 6 - The Superbowl - big radios, lots of power, often in the tens of kilowatts
  • 27.085 MHz AM - CB channel 11 - AM DX calling channel - the original calling channel from the 23 channel CB days
  • 27.125 MHz AM - CB channel 14 - often used as a local AM CB channel, also used for AM CB in Europe and UK
  • 27.165 MHz AM - CB channel 17 - often used as an alternate channel to 27.185/channel 19 for truckers
  • 27.185 MHz AM - CB channel 19 - trucker channel, road channel, interstate highways, probably the best spot to try first
  • 27.215 MHz AM - CB channel 21 - often used as an alternate channel to 27.185/channel 19 for truckers
  • 27.265 MHz AM - CB channel 26 - AM DX calling channel, see also: 27.025 AM, 27.085 AM, 27.285 AM
  • 27.285 MHz AM - CB channel 28 - AM DX calling channel, see also: 27.025 MHz, etc
  • 27.315 MHz AM - CB channel 31 - AM DX calling channel, used for DXing in FM mode in Europe and UK
  • 27.385 MHz LSB - CB channel 38 - SSB DX calling channel, LSB mode - North American SSB channel (see also: 27.375 LSB, 27.395 LSB)
  • 27.405 MHz - 27.855 MHz - Band E - "high band" or "uppers", mixture of SSB, AM and FM
  • 27.415 MHz LSB - US calling/working frequencies (channels +5 kHz, 27.420 MHz, 27.425 MHz, 27.430 MHz, and so on, usually in LSB mode)
  • 27.455 MHz USB - Latin American calling frequency (see also 26.555 MHz LSB) - Spanish language
  • 27.515 MHz LSB - Jamaica and Caribbean calling/DX frequency "The Knight Patrol"
  • 27.555 MHz USB - international 11 meter DX calling frequency
  • 27.60125 MHz - 27.99125 MHz - UK FM 27/81 CB (UK only) also CADS/WPAS Channels LW01-LW40 UK, Ireland (AM/FM modes, Church broadcasts) straight 10 kHz channel steps
  • 27.605 MHz - 27.995 MHz - CADS/WPAS Channels UW01-UW40 UK, Ireland and elsewhere straight 10 kHz channel steps
  • 27.635 MHz USB - digital modes found here in Europe (ROS, PSK31), see also 27.235 MHz and 27.245 MHz
  • 27.635 MHz AM - CB channel 19 "up one band" - truckers are often heard here (see also 26.735 MHz)
  • 27.665 MHz USB - Spanish language common frequencies + 5 kHz USB/LSB to 27.705 MHz or higher
  • 27.700 MHz USB - international 11 meter SSTV frequency
  • 27.735 MHz USB - international 11 meter SSTV frequency (alternate, also digital SSTV)
  • 27.775 MHz AM - sometimes AM signals are heard on this frequency and higher during band openings, often taxi dispatchers, etc
  • 27.855 MHz AM - High band channel 40 - popular with trucking companies and taxi cabs
  • 27.855 MHz - 28.305 MHz - Band F - up to 27.995 MHz (channel 11A) popular with taxicabs and truckers, although truckers are often heard above 28.000 MHz it is strongly advised that freebanders stay below 28 MHz