WARC band

The WARC bands are three portions of the shortwave radio spectrum used by licensed amateur radio operators. They consist of 30 meters (10.100–10.150 MHz), 17 meters (18.068–18.168 MHz) and 12 meters (24.890–24.990 MHz).[1][2] They were named after the World Administrative Radio Conference, which in 1979 created a worldwide allocation of these bands for amateur use. The bands were opened for use in the early 1980s. Due to their relatively small bandwidth of 100 kHz or less, there is a sort of gentlemen's agreement that the WARC bands may not be used for general contesting. This agreement has been codified in official recommendations, such as the IARU Region 1 HF Manager's Handbook, which states:

Contest activity shall not take place on the 10, 18 and 24 MHz bands.

Non-contesting radio amateurs are recommended to use the contest-free HF bands (30, 17 and 12m) during the largest international contests. (DV05_C4_Rev_07)[3]

Throughout most of the world, the 30 meter band cannot be used for phone communications except in emergency situations. However, part of Region 1 (Africa, south of the equator, during daylight hours) is permitted to use phone.[4] The USA limits amateur radio users to 200 watts peak envelope power on this band.[5]

History

12 meter band plan

IARU Region 1[6]

License class 24.890–24.915 24.915-24.925 24.925-24.929 24.929-24.931 24.931-24.940 24.940-24.990
Effective 1 Jan 2008

IARU Region 2[7]

License class 24.890–24.915 24.915-24.925 24.925-24.929 24.929-24.931 24.931-24.940 24.940-24.990
Effective 1 Jan 2008

IARU Region 3[8]

License class 24.890–24.920 24.920-24.9295 24.9295-24.9305 24.940-24.990
Effective as of 2009 2 kHz max BW

Canada[9]

Canada is part of region 2 and as such is subject to the IARU band plan. Radio Amateurs of Canada offers the bandplan below as a recommendation for use by radio amateurs in that country but it does not have the force of law and should only be considered a suggestion or guideline.

License class 24.890–24.920 24.920-24.925 24.925-24.9295 24.9295-24.9305 24.9305-24.940 24.940-24.990
Basic(+), Advanced

United States

License class 24.890–24.930 24.930-24.990
Extra, Advanced, General

17 meter band plan

IARU Region 1

License class 18.068-18.095 18.095-18.105 18.105-18.109 18.109-18.111 18.111-18.120 18.120-18.168
Effective 1 Jan 2008

IARU Region 2

License class 18.068-18.095 18.095-18.105 18.105-18.109 18.109-18.111 18.111-18.120 18.120-18.168
Effective 1 Jan 2008

IARU Region 3

License class 18.068-18.095 18.095-18.105 18.105-18.1095 18.1095-18.1105 18.1105-18.168
Effective as of 2009

Canada[9]

Canada is part of region 2 and as such is subject to the IARU band plan. Radio Amateurs of Canada offers the bandplan below as a recommendation for use by radio amateurs in that country but it does not have the force of law and should only be considered a suggestion or guideline.

License class 18.068-18.095 18.095-18.105 18.105-18.1095 18.1095-18.1105 18.1105-18.168
Basic(+), Advanced

United States

License class 18.068-18.110 18.110-18.168
Extra, Advanced, General

30 meter band plan

IARU Region 1

License class 10.100-10.140 10.140-10.150
Effective 1 Jan 2008

SSB may be used during emergencies involving the immediate safety of life and property and only by stations actually involved in the handling of emergency traffic.

The band segment 10.120 to 10.140 may only be used for SSB transmissions in the area of Africa south of the equator during local daylight hours.

IARU Region 2

License class 10.100-10.130 10.130-10.140 10.140-10.150
Effective 1 Jan 2008

IARU Region 3

License class 10.100-10.140 10.140-10.150
Effective 2009

Canada[9]

Canada is part of region 2 and as such is subject to the IARU band plan. Radio Amateurs of Canada offers the bandplan below as a recommendation for use by radio amateurs in that country but it does not have the force of law and should only be considered a suggestion or guideline.

License class 10.100-10.130 10.130-10.140 10.140-10.150
Basic(+), Advanced

United States

License class 10.100-10.150
Ext., Adv., Gen. (200 watts)

Key for Band Plans

= CW only
= CW, narrow band digital ( <= 500 Hz )
= CW, narrow band digital ( <= 500 Hz ), unattended stations
= CW, narrow band digital ( <= 500 Hz ), wide band digital
= Beacons
= CW, phone
= All modes, unattended stations
= All modes except phone
= All modes

See also

References


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