20-meter band
The20-meteror14-MHzamateur radioband is a portion of theshortwaveradio spectrum, comprising frequencies stretching from 14.000MHzto 14.350 MHz.[1]The 20-meter band is widely considered among the best for long-distance communication (DXing), and is one of the most popular—and crowded—duringcontests.[2]Several factors contribute to this, including the band's large size, the relatively small size of antennas tuned to it (especially as compared to antennas for the40-meter bandor the80-meter band) and its good potential for daytime DX operation even in unfavorablepropagationconditions.[3]
History
[edit]![[icon]](/translate/en.wikipedia.org?u=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFile%3AWiki_letter_w_cropped.svg&t=vi){kind=small} | This sectionneeds expansion.You can help byadding to it.(January 2011) |
The Third National Radio Conference was responsible for opening up the 20-meter band to amateur radio operators in the US[4]on October 10, 1924. The band was allocated on a worldwide basis by the International Radiotelegraph Conference[5]in Washington, D.C.,on October 4, 1927. Its frequency allocation was then 14–14.4 MHz. The allocation was reduced to 14–14.35 MHz by the International Radio Conference ofAtlantic City, New Jersey1947.[6]
Band plans
[edit]IARU Region 1
[edit]Europe, Africa, Middle East and Northern Asia[7]
| 20 meters | 14000–14070 | 14070–14099 | 14099–14101 | 14101–14350 |
|---|---|---|---|---|
| IARU Region 1 |
IARU Region 2
[edit]The Americas[7]
| 20 meters | 14000–14070 | 14070–14099 | 14099–14101 | 14101–14350 |
|---|---|---|---|---|
| IARU Region 2 |
IARU Region 3
[edit]Asia-Pacific[7]
| 20 meters | 14000–14070 | 14070–14099 | 14099–14101 | 14101–14112 | 14112–14350 |
|---|---|---|---|---|---|
| IARU Region 3 |
United States
[edit]Effective 12:01 a.m. EST, February 23, 2007
| 20 meters | 14000–14350 | ||||
|---|---|---|---|---|---|
 United States
|
14000–14025 | 14025–14150 | 14150–14175 | 14175–14225 | 14225–14350 |
| General | |||||
| Advanced | |||||
| Extra | |||||
Canada
[edit]Canada[8]is part of region 2 and as such is subject to the IARU band plan.Radio Amateurs of Canadaoffers 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 | 14.000–14.070 | 14.070–14.095 | 14.095–14.0995 | 14.0995–14.1005 | 14.1005–14.112 | 14.112–14.350 |
|---|---|---|---|---|---|---|
| Basic(+), Advanced |
Japan
[edit]Changed on September 25, 2023.
| License class | 14000–14070 | 14070–14100 | 14100–14350 |
|---|---|---|---|
| 1st and 2nd | narrow-band All modes |
Key
| =CWonly | |
| =CW,narrow band digital ( <= 500 Hz ) | |
| =CW,narrow band digital ( <= 500 Hz ), wide band digital | |
| =CW,RTTYand data (US: < 1 kHz Bandwidth) | |
| = Beacons | |
| =CW,phone | |
| =CW,narrow band digital ( <= 500 Hz ),phone | |
| =CW,phoneand image |
References
[edit]- ^"Frequency Allocations".Arrl.org. 5 March 2012.Archivedfrom the original on 14 March 2010.Retrieved29 October2012.
- ^Ford, Steve (ed.). "Picking a band".The ARRL Operating Manual(8th ed.). Newington, CT:American Radio Relay League.p. 1-15.
- ^"Propagation of RF Signals".The ARRL Handbook For Radio Communications(82nd ed.). Newington, CT:American Radio Relay League.2005. p. 20.4.ISBN0-87259-928-0.
- ^"Frequency or wave band allocations".Recommendations for Regulation of Radio Adopted by the Third National Radio Conference.Govt. Print. Off. October 6–10, 1924. p. 15.
- ^"INTERNATIONAL RADIOTELEGRAPH CONVENTION AND GENERAL AND SUPPLEMENTARY REGULATIONS"(PDF).INTERNATIONAL RADIOTELEGRAPH CONVENTION OF WASHINGTON, 1927. 25 November 1927. Archived fromthe original(PDF)on 8 March 2014.Retrieved6 July2014.
- ^"RADIO REGULATIONS ANNEXED TO THE INTERNATIONAL TELECOMMUNICATION CONVENTION (ATLANTIC CITY, 1947)"(PDF).Archived fromthe original(PDF)on 15 July 2014.Retrieved6 July2014.
- ^abc"IARU Regions".iaru.org.International Amateur Radio Union (IARU). Archived fromthe originalon 30 December 2013.Retrieved6 January2014.
- ^"RAC MF/HF Band Plan"(PDF).rac.ca.Archived fromthe original(PDF)on 27 November 2010.Retrieved8 July2008.
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