11 meter - Revision history

R4002: Additional clarifying information, plus links to other HFU Wiki pages for easier navigation.

2026-11-04T20:17:40Z

Additional clarifying information, plus links to other HFU Wiki pages for easier navigation.

← Older revision		Revision as of 20:17, 4 November 2026
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	It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] the spectrum [[Template:11_m\|frequency band(band)]] from as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.		It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] the spectrum [[Template:11_m\|frequency band(band)]] from as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.

-	[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.	+	[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.

R4002 at 20:16, 4 November 2026

2026-11-04T20:16:58Z

← Older revision		Revision as of 20:16, 4 November 2026
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	11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz.		11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz.

-	It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.	+	It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] the spectrum [[Template:11_m\|frequency band(band)]] from as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.

	[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.		[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.

R4002: Moving sections from the "CB" Wiki page to this page to make the CB page not nearly as bloated

2026-11-04T20:13:10Z

Moving sections from the "CB" Wiki page to this page to make the CB page not nearly as bloated

← Older revision		Revision as of 20:13, 4 November 2026
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	It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.		It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.

-	[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.	+	[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.

R4002: /* Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid */

2026-11-04T20:12:27Z

Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid

← Older revision		Revision as of 20:12, 4 November 2026
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	*29.790 MHz 29790 kHz - Business Radio Service land mobile allocation, licensed users 29.79 MHz FM		*29.790 MHz 29790 kHz - Business Radio Service land mobile allocation, licensed users 29.79 MHz FM
	*29.894 MHz 29894 kHz - Civil Air Patrol (CAP) - Nationwide Use		*29.894 MHz 29894 kHz - Civil Air Patrol (CAP) - Nationwide Use
		+
		+
		+
		+	==What is Free Banding What is freeband CB radio?==
		+
		+
		+	Freebanding generally means operating on frequencies above or below the legal CB band in your country. What may be a legal CB frequency in one country may not be legal in another. For example, a trucker operating on CB channel 19 wishes to find a clear frequency to talk to another driver without all the interference found on 27.185 MHz. So he (and the person he's talking to) switch their radios "down one band" (-450 kHz or -0.450 MHz) from 27.185 MHz to 26.735 MHz. The radio's channel display still says "19" but the bandswitch has been moved down one. Often export radios will have 3, 6, 8 or even 12 bands. Freebanding does have some general "gentlemen's agreements" in place. For example, AM operators usually stick to the lower frequencies ''below'' CB channel 1 (26.965 MHz), with activity centered around '''26.915 MHz''' (channel 36 down one band), 26.885 MHz, (channel 33 down one band) and other frequencies relatively close to the legal CB band. There are practical reasons for this, the primary one being antenna performance decreases the further away one gets in frequency from the antenna's resonant frequency.
		+
		+	SSB operators usually operate ''above'' CB channel 40 (27.405 MHz) and often use 5 kHz steps instead of the standard 10 kHz steps. This means that in addition to 27.425 MHz, 27.435 MHz, 27.445 MHz, 27.455 MHz, etc, the "0 raster" frequencies are used as well (i.e. 27.420 MHz, [[Business_Radio#VHF_Low_Band_25-50_MHz\|27.430 MHz]], [[Business_Radio#VHF_Low_Band_25-50_MHz\|27.450 MHz]], 27.460 MHz, [[Business_Radio#VHF_Low_Band_25-50_MHz\|27.490]] MHz, etc). English-speaking stations will often stick with LSB mode, due to the gentlemen's agreement of using LSB for CB communications (see also: 27.385 LSB or channel 38 LSB) but there are several exceptions - the primary one being '''27.555 MHz USB - the freeband calling frequency'''. In Europe, SSB activity is also found on the 26 MHz frequencies between 26.2 and 26.5 MHz (calling frequency '''26.285 MHz USB'''), often as a method of escaping the heavy activity on the upper frequencies and FM signals on the three "main" European CB bands (see CB bands in the sections below).
		+
		+	In the Americas, 26.225 MHz USB, 26.235 MHz USB and 26.555 MHz LSB are commonly used by Spanish-speaking stations for SSB calling. 27.455 MHz USB is also used (think of it as the Latin American version of 27.555 USB). There are dozens of other frequencies, both above and below the CB band, which are used and/or claimed by various groups, users, radio clubs, etc.
		+
		+	With some common sense, freebanding allows the extremely large number of users of the [[11_meter\|11 meter]] band to find clear frequencies for long distance communication with minimal interference issues. It is against the [[Bust\|law (technically)]] but [[FCC\|enforcement]] is basically nonexistent. See the list of frequencies and bands commonly associated with freebanding CB or the 11 meter band below.

	==Freeband 11 Meter Frequencies - Guide to 11m Frequencies Guide to 11 meter DX calling frequencies==		==Freeband 11 Meter Frequencies - Guide to 11m Frequencies Guide to 11 meter DX calling frequencies==

R4002: Additional clarification on UK FM CB band for 11 meter page (linking to other HFU Wiki pages)

2026-09-14T19:19:49Z

Additional clarification on UK FM CB band for 11 meter page (linking to other HFU Wiki pages)

← Older revision		Revision as of 19:19, 14 September 2026
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	11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz.		11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz.

-	It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.	+	It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands\|roughly defined internationally]] as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.

	[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.		[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond\|The original]] 11 meter [[Amateur_radio\|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.

R4002: /* Legal Users of the 25-30 MHz Spectrum */

2026-09-14T19:19:07Z

Legal Users of the 25-30 MHz Spectrum

← Older revision		Revision as of 19:19, 14 September 2026
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	\|27.59625 MHz to 27.99625 MHz		\|27.59625 MHz to 27.99625 MHz
	\|27596.25 kHz to 27996.25 kHz		\|27596.25 kHz to 27996.25 kHz
-	\|Citizen's Band - CB radio - United Kingdom UK CB 27/81 UK FM CB 27.60125 MHz - 27.99125 MHz 40 channels	+	\|Citizen's Band - CB radio - [[CB#UK_CB_.2227.2F81.22_Frequencies\|United Kingdom UK CB 27/81 UK FM CB 27.60125 MHz - 27.99125 MHz 40 channels]]
	\|-		\|-
	\|27.600 MHz to 28.0 MHz		\|27.600 MHz to 28.0 MHz

R4002: /* Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid */

2026-09-11T13:29:51Z

Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid

← Older revision		Revision as of 13:29, 11 September 2026
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	*26.750 MHz 26750 kHz - Military use		*26.750 MHz 26750 kHz - Military use
	*26.850 MHz 26850 kHz - Military use		*26.850 MHz 26850 kHz - Military use
-	*26.900 MHz 26900 kHz - Paging (Europe)	+	*26.900 MHz 26900 kHz - [[HF_pagers#Frequency_List\|Paging (Europe)]]
	*26.945 MHz 26945 kHz - Data links, paging, telemetry, alarms (Russia)		*26.945 MHz 26945 kHz - Data links, paging, telemetry, alarms (Russia)
	*26.950 MHz 26950 kHz - International fixed service, also paging		*26.950 MHz 26950 kHz - International fixed service, also paging

R4002: /* Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid */

2026-09-11T13:28:27Z

Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid

← Older revision		Revision as of 13:28, 11 September 2026
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	Many of these frequencies are only technically allocated, but are rarely used due to the heavy CB radio and out of band or freeband CB radio traffic on/near them.		Many of these frequencies are only technically allocated, but are rarely used due to the heavy CB radio and out of band or freeband CB radio traffic on/near them.
-
-

R4002: /* Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid */

2026-09-11T13:28:22Z

Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid

← Older revision		Revision as of 13:28, 11 September 2026
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	*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505		*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505
	*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506		*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506
-	*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 ~~- Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz~~	+	*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507
	*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508		*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508
	*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509		*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509

R4002: /* Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid */

2026-09-11T13:28:16Z

Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid

← Older revision		Revision as of 13:28, 11 September 2026
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	*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506		*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506
	*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz		*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz
-	*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508 ~~- Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz~~	+	*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508
	*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509		*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509
	*26.172 MHz 26172 kHz - HF SSB Marine Channel 2510		*26.172 MHz 26172 kHz - HF SSB Marine Channel 2510