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| | One of the challenges for ham operators is the lack of 1.25-meter radio equipment available on the commercial market. As of this writing there is no current all-mode amateur transceiver for this band. Any all mode transceivers are out of production, and the small handful of current production models are FM only. [[1.25 Meter Ham Radio Transceivers]] are primarily FM mode. | | One of the challenges for ham operators is the lack of 1.25-meter radio equipment available on the commercial market. As of this writing there is no current all-mode amateur transceiver for this band. Any all mode transceivers are out of production, and the small handful of current production models are FM only. [[1.25 Meter Ham Radio Transceivers]] are primarily FM mode. |
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| − | <div id="content"><div id="ZONE-C"><div id="f-widget-145865" class="f-widget f-text_area">
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| − |
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| − | == Band Plan ==
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| − |
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| − | <div class="article">
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| − |
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| − | A band plan refers to a voluntary division of a band to avoid interference between incompatible modes.'''<span><br /></span>'''
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| − |
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| − | === Resources ===
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| − |
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| − | * [/part-97-amateur-radio Sharing arrangements]
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| − | * [/files/file/8803051.pdf Detailed packet frequencies] [PDF]
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| − | * [/phone-patch-guidelines Phone patch, autopatch and HF/VHF/UHF operating guidelines]
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| − | * [/considerate-operator "Considerate Operator's Frequency Guide"]
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| − |
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| − | === 160 Meters (1.8-2.0 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 1.800 - 2.000
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| − | | CW
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| − | |-
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| − | | 1.800 - 1.810
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| − | | Digital Modes
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| − | |- class="alt"
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| − | | 1.810
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| − | | CW QRP
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| − | |-
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| − | | 1.843-2.000
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| − | | SSB, SSTV and other wideband modes
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| − | |- class="alt"
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| − | | 1.910
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| − | | SSB QRP
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| − | |-
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| − | | 1.995 - 2.000
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| − | | Experimental
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| − | |- class="alt"
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| − | | 1.999 - 2.000
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| − | | Beacons
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| − | |}
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| − |
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| − | === 80 Meters (3.5-4.0 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 3.590
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| − | | RTTY/Data DX
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| − | |-
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| − | | 3.570-3.600
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| − | | RTTY/Data
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| − | |- class="alt"
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| − | | 3.790-3.800
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| − | | DX window
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| − | |-
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| − | | 3.845
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| − | | SSTV
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| − | |- class="alt"
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| − | | 3.885
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| − | | AM calling frequency
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| − | |}
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| − |
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| − | === 60 Meters (5 MHz channels) ===
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| − |
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| − | <nowiki>*Only one signal at a time is permitted on any channel</nowiki>
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| − |
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| − | <nowiki>*Maximum effective radiated output is 100 W PEP</nowiki>
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 5330.5
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| − | |
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| − | USB phone[#one <sup>1</sup>] and CW/RTTY/data[#two <sup>2</sup>]
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| − | |-
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| − | | 5346.5
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| − | |
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| − | USB phone[#one <sup>1</sup>] and CW/RTTY/data[#two <sup>2</sup>]
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| − | |- class="alt"
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| − | | 5357.0
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| − | |
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| − | USB phone[#one <sup>1</sup>] and CW/RTTY/data[#two <sup>2</sup>]
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| − | |-
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| − | | 5371.5
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| − | |
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| − | USB phone[#one <sup>1</sup>] and CW/RTTY/data[#two <sup>2</sup>]
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| − | |- class="alt"
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| − | | 5403.5
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| − | |
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| − | USB phone[#one <sup>1</sup>] and CW/RTTY/data[#two <sup>2</sup>]
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| − | |}
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| − |
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| − | === ===
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| − |
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| − | '''1. '''USB is limited to 2.8 kHz
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| − |
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| − | '''2. '''CW and digital emissions must be centered 1.5 kHz above the channel frequencies indicated in the above chart
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| − |
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| − | === 40 Meters (7.0-7.3 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 7.040
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| − | | RTTY/Data DX
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| − | |-
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| − | | 7.080-7.125
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| − | | RTTY/Data
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| − | |- class="alt"
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| − | | 7.171
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| − | | SSTV
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| − | |-
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| − | | 7.290
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| − | | AM calling frequency
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| − | |}
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| − |
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| − | === 30 Meters (10.1-10.15 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 10.130-10.140
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| − | | RTTY
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| − | |-
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| − | | 10.140-10.150
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| − | | Packet
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| − | |}
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| − |
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| − | === 20 Meters (14.0-14.35 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 14.070-14.095
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| − | | RTTY
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| − | |-
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| − | | 14.095-14.0995
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| − | | Packet
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| − | |- class="alt"
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| − | | 14.100
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| − | | NCDXF Beacons
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| − | |-
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| − | | 14.1005-14.112
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| − | | Packet
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| − | |- class="alt"
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| − | | 14.230
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| − | | SSTV
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| − | |-
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| − | | 14.286
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| − | | AM calling frequency
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| − | |}
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| − |
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| − | === 17 Meters (18.068-18.168 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 18.100-18.105
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| − | | RTTY
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| − | |-
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| − | | 18.105-18.110
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| − | | Packet
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| − | |}
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| − |
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| − | === 15 Meters (21.0-21.45 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 21.070-21.110
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| − | | RTTY/Data
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| − | |-
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| − | | 21.340
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| − | | SSTV
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| − | |}
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| − |
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| − | === 12 Meters (24.89-24.99 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 24.920-24.925
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| − | | RTTY
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| − | |-
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| − | | 24.925-24.930
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| − | | Packet
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| − | |}
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| − |
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| − | === 10 Meters (28-29.7 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 28.000-28.070
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| − | | CW
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| − | |-
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| − | | 28.070-28.150
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| − | | RTTY
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| − | |- class="alt"
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| − | | 28.150-28.190
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| − | | CW
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| − | |-
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| − | | 28.200-28.300
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| − | | Beacons
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| − | |- class="alt"
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| − | | 28.300-29.300
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| − | | Phone
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| − | |-
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| − | | 28.680
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| − | | SSTV
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| − | |- class="alt"
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| − | | 29.000-29.200
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| − | | AM
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| − | |-
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| − | | 29.300-29.510
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| − | | Satellite Downlinks
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| − | |- class="alt"
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| − | | 29.520-29.590
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| − | | Repeater Inputs
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| − | |-
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| − | | 29.600
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| − | | FM Simplex
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| − | |- class="alt"
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| − | | 29.610-29.700
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| − | | Repeater Outputs
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| − | |}
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| − |
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| − | === 6 Meters (50-54 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 50.0-50.1
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| − | | CW, beacons
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| − | |-
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| − | | 50.060-50.080
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| − | | beacon subband
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| − | |- class="alt"
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| − | | 50.1-50.3
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| − | | SSB, CW
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| − | |-
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| − | | 50.10-50.125
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| − | | DX window
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| − | |- class="alt"
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| − | | 50.125
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| − | | SSB calling
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| − | |-
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| − | | 50.3-50.6
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| − | | All modes
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| − | |- class="alt"
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| − | | 50.6-50.8
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| − | | Nonvoice communications
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| − | |-
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| − | | 50.62
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| − | | Digital (packet) calling
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| − | |- class="alt"
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| − | | 50.8-51.0
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| − | | Radio remote control (20-kHz channels)
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| − | |-
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| − | | 51.0-51.1
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| − | | Pacific DX window
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| − | |- class="alt"
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| − | | 51.12-51.48
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| − | | Repeater inputs (19 channels)
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| − | |-
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| − | | 51.12-51.18
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| − | | Digital repeater inputs
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| − | |- class="alt"
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| − | | 51.5-51.6
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| − | |
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| − | Simplex (six channels)
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| − | |-
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| − | | 51.62-51.98
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| − | | Repeater outputs (19 channels)
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| − | |- class="alt"
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| − | | 51.62-51.68
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| − | | Digital repeater outputs
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| − | |-
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| − | | 52.0-52.48
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| − | | Repeater inputs (except as noted; 23 channels)
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| − | |- class="alt"
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| − | | 52.02, 52.04
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| − | | FM simplex
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| − | |-
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| − | | 52.2
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| − | | TEST PAIR (input)
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| − | |- class="alt"
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| − | | 52.5-52.98
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| − | | Repeater output (except as noted; 23 channels)
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| − | |-
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| − | | 52.525
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| − | | Primary FM simplex
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| − | |- class="alt"
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| − | | 52.54
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| − | | Secondary FM simplex
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| − | |-
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| − | | 52.7
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| − | | TEST PAIR (output)
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| − | |- class="alt"
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| − | | 53.0-53.48
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| − | | Repeater inputs (except as noted; 19 channels)
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| − | |-
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| − | | 53.0
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| − | | Remote base FM simplex
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| − | |- class="alt"
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| − | | 53.02
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| − | | Simplex
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| − | |-
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| − | | 53.1, 53.2, 53.3, 53.4
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| − | | Radio remote control
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| − | |- class="alt"
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| − | | 53.5-53.98
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| − | | Repeater outputs (except as noted; 19 channels)
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| − | |-
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| − | | 53.5, 53.6, 53.7, 53.8
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| − | | Radio remote control
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| − | |- class="alt"
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| − | | 53.52, 53.9
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| − | | Simplex
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| − | |}
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| − |
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| − | === 2 Meters (144-148 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 144.00-144.05
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| − | | EME (CW)
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| − | |-
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| − | | 144.05-144.10
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| − | | General CW and weak signals
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| − | |- class="alt"
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| − | | 144.10-144.20
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| − | | EME and weak-signal SSB
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| − | |-
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| − | | 144.200
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| − | | National calling frequency
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| − | |- class="alt"
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| − | | 144.200-144.275
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| − | | General SSB operation
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| − | |-
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| − | | 144.275-144.300
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| − | | Propagation beacons
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| − | |- class="alt"
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| − | | 144.30-144.50
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| − | | New OSCAR subband
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| − | |-
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| − | | 144.50-144.60
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| − | | Linear translator inputs
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| − | |- class="alt"
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| − | | 144.60-144.90
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| − | | FM repeater inputs
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| − | |-
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| − | | 144.90-145.10
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| − | | Weak signal and FM simplex (145.01,03,05,07,09 are widely used for packet)
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| − | |- class="alt"
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| − | | 145.10-145.20
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| − | | Linear translator outputs
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| − | |-
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| − | | 145.20-145.50
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| − | | FM repeater outputs
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| − | |- class="alt"
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| − | | 145.50-145.80
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| − | | Miscellaneous and experimental modes
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| − | |-
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| − | | 145.80-146.00
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| − | | OSCAR subband
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| − | |- class="alt"
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| − | | 146.01-146.37
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| − | | Repeater inputs
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| − | |-
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| − | | 146.40-146.58
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| − | | Simplex
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| − | |- class="alt"
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| − | | 146.52
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| − | | National Simplex Calling Frequency
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| − | |-
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| − | | 146.61-146.97
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| − | | Repeater outputs
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| − | |- class="alt"
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| − | | 147.00-147.39
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| − | | Repeater outputs
| |
| − | |-
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| − | | 147.42-147.57
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| − | | Simplex
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| − | |- class="alt"
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| − | | 147.60-147.99
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| − | | Repeater inputs
| |
| − | |}
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| − |
| |
| − | '''Notes:''' The frequency 146.40 MHz is used in some areas as a repeater input. This band plan has been proposed by the ARRL VHF-UHF Advisory Committee.
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| − |
| |
| − | === 1.25 Meters (222-225 MHz) ===
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| − |
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| − | {| class="striped"
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| − | |- class="alt"
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| − | | 222.0-222.150
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| − | | Weak-signal modes
| |
| − | |-
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| − | | 222.0-222.025
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| − | | EME
| |
| − | |- class="alt"
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| − | | 222.05-222.06
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| − | | Propagation beacons
| |
| − | |-
| |
| − | | 222.1
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| − | | SSB & CW calling frequency
| |
| − | |- class="alt"
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| − | | 222.10-222.15
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| − | | Weak-signal CW & SSB
| |
| − | |-
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| − | | 222.15-222.25
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| − | | Local coordinator's option; weak signal, ACSB, repeater inputs, control
| |
| − | |- class="alt"
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| − | | 222.25-223.38
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| − | | FM repeater inputs only
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| − | |-
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| − | | 223.40-223.52
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| − | | FM simplex
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| − | |- class="alt"
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| − | | 223.52-223.64
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| − | | Digital, packet
| |
| − | |-
| |
| − | | 223.64-223.70
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| − | | Links, control
| |
| − | |- class="alt"
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| − | | 223.71-223.85
| |
| − | | Local coordinator's option; FM simplex, packet, repeater outputs
| |
| − | |-
| |
| − | | 223.85-224.98
| |
| − | | Repeater outputs only
| |
| − | |}
| |
| − |
| |
| − | '''Note:''' The 222 MHz band plan was adopted by the ARRL Board of Directors in July 1991.
| |
| − |
| |
| − | </div></div></div></div>
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| | | | |
| | | | |
The 1.25-meter amateur radio band is a portion of the VHF radio spectrum, comprising frequencies stretching from 222 MHz to 225 MHz. Other names for this ham band include the 220 band and the 222 band. The FCC took away from ham operators frequencies from 220 MHz to 222 MHz in 1988. There remains a secondary allocation for amateur use at 219-220 MHz, however, FM voice is not permitted within this secondary allocation.
In 2001 the FCC allocated the 216-220 MHz band to the fixed and mobile services (co-primary), although some government systems in the band will remain. The decision was made that limited secondary allocation to the Amateur Service at 219-220 MHz is being maintained. The amateur allocation at 219-220 MHz is secondary to the Automated Maritime Telecommunications System (AMTS). Within the 1 MHz of spectrum, Amateurs may install and operate point-to-point digital message-forwarding systems, but only under strict limitations that require coordination with and sometimes approval by AMTS licensees. As the FCC takes more spectrum away from other users, including hams, and auctions it off for private business use, the ARRL and ham operators will continue to lose ground unless a change occurs in the current political climate.
One of the challenges for ham operators is the lack of 1.25-meter radio equipment available on the commercial market. As of this writing there is no current all-mode amateur transceiver for this band. Any all mode transceivers are out of production, and the small handful of current production models are FM only. 1.25 Meter Ham Radio Transceivers are primarily FM mode.
