20-meter band explained

The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14.000 MHz to 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—during contests.[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 the 40-meter band or the 80-meter band) and its good potential for daytime DX operation even in unfavorable propagation conditions.[3]

History

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] inWashington, 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 of Atlantic City, New Jersey 1947.[6]

Band plans

IARU Region 1

Europe, Africa, Middle East and Northern Asia[7]

width=120px 20 meterswidth= 140px 14000–14070width= 58px 14070–14099width= 20px 14099–14101width=498px 14101–14350
IARU Region 1

IARU Region 2

The Americas

width=120px 20 meterswidth= 140px 14000–14070width= 58px 14070–14099width= 20px 14099–14101width=498px 14101–14350
IARU Region 2

IARU Region 3

Asia-Pacific

width=120px 20 meterswidth= 140px 14000–14070width= 58px 14070–14099width= 20px 14099–14101width=22px 14101–14112width=446px 14112–14350
IARU Region 3

United States

Effective 12:01 a.m. EST, February 23, 2007

20 meters14000–14350
14000–1402514025–1415014150–1417514175–1422514225–14350
General
Advanced
Extra

Canada

Canada[8] 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.

Japan

Changed on September 25, 2023.

width=120px License classwidth= 140px 14000–14070width= 58px 14070–14100width= 520px 14100–14350
1st and 2ndnarrow-band All modes

Key

= CW only
= CW, narrow band digital (<= 500 Hz)
= CW, narrow band digital (<= 500 Hz), wide band digital
= CW, RTTY and data (US: < 1 kHz Bandwidth)
= Beacons
= CW, phone
= CW, narrow band digital (<= 500 Hz), phone
= CW, phone and image

Notes and References

  1. Web site: Frequency Allocations . Arrl.org . 2012-03-05 . 2012-10-29 . live . https://web.archive.org/web/20100314191057/http://www.arrl.org/FandES/field/regulations/allocate.html . 2010-03-14 . dmy-all.
  2. Book: Picking a band . The ARRL Operating Manual . 8th . Ford, Steve . 115 . . Newington, CT.
  3. Book: The ARRL Handbook For Radio Communications . 82nd . 2005 . . Newington, CT . 0-87259-928-0 . 20.4 . Propagation of RF Signals.
  4. Book: Recommendations for Regulation of Radio Adopted by the Third National Radio Conference . Frequency or wave band allocations . October 6–10, 1924 . 15. Govt. Print. Off. .
  5. Web site: INTERNATIONAL RADIOTELEGRAPH CONVENTION AND GENERAL AND SUPPLEMENTARY REGULATIONS. . 25 November 1927 . INTERNATIONAL RADIOTELEGRAPH CONVENTION OF WASHINGTON, 1927 . 2014-07-06 . dmy-all . dead . https://web.archive.org/web/20140308211326/http://www.itu.int/dms_pub/itu-s/oth/02/01/S02010000144002PDFE.pdf . 2014-03-08 .
  6. Web site: RADIO REGULATIONS ANNEXED TO THE INTERNATIONAL TELECOMMUNICATION CONVENTION (ATLANTIC CITY, 1947) . 2014-07-06 . dead . https://web.archive.org/web/20140715055049/http://www.itu.int/dms_pub/itu-s/oth/02/01/S020100002B4002PDFE.pdf . 2014-07-15 . dmy-all.
  7. Web site: IARU Regions . www.iaru.org . International Amateur Radio Union (IARU) . 6 January 2014 . dead . https://web.archive.org/web/20131230025948/http://www.iaru.org/regions.html . 30 December 2013 .
  8. Web site: RAC MF/HF Band Plan . rac.ca . 2008-07-08 . dead . https://web.archive.org/web/20101127081357/http://rac.ca/en/rac/services/bandplans/hf/hfplan-20080711.pdf . 2010-11-27 . dmy-all.