The WARC bands are three portions of the shortwave radio spectrum used by licensed and/or certified 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). 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 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)
Throughout most of the world, the 30 meter band cannot be used for "phone" (voice) communications except in emergency situations. However, part of Region 1 (Africa, south of the equator, during daylight hours) is permitted to use phone. The USA limits amateur radio users to 200 watts peak envelope power on this band.
Video WARC bands
History
Maps WARC bands
12 metre band plan
IARU Region 1
IARU Region 2
IARU Region 3
Canada
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.
United States
17 metre band plan
IARU Region 1
IARU Region 2
Canada
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.
United States
The United States is part of ITU Region 2 and as such is subject to the IARU band plan. The Amateur Radio Relay League 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.
IARU Region 3
30 metre band plan
IARU Region 1
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
IARU Region 3
Canada
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.
United States
Key for band plans
See also
- Amateur radio frequency allocations
- International Telecommunication Union
- World Radiocommunication Conference
- Regional Radiocommunication Conference
- Radio Regulations
- Federal Communications Commission
- Radio Amateurs of Canada
- Ofcom
References
External links
- US Amateur Radio Bands chart
Source of article : Wikipedia
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