30-meter band

Lore & Background

The 30-meter band was created by the World Administrative Radio Conference in 1979 and opened for amateur use in the early 1980s. It is one of three WARC bands, named after that conference. Due to its small bandwidth, a gentlemen's agreement prohibits general contesting on the WARC bands, codified in recommendations such as the IARU Region 1 HF Manager's Handbook, which states: 'Contest activity shall not take place on the 5, 10, 18, and 24 MHz bands.' Non-contesting amateurs are recommended to use the contest-free HF bands (including 30 meters) during large international contests.

Throughout most of the world, the 30-meter band generally cannot be used for phone (voice) communications. SSB may be used only during emergencies involving immediate safety of life and property, and only by stations handling emergency traffic. However, a part of Region 1—specifically the area of Africa south of the equator—is permitted to use SSB on the segment 10.12–10.14 MHz during local daylight hours. In Region 3, Australia allows voice operation on 10.12–10.135 MHz for advanced license holders, with CW only below 10.12 MHz, though these are recommendations only. The United States limits amateur users to 200 watts peak envelope power on this band.

Reader's Guide

The 30-meter band holds a unique place in amateur radio as one of the three WARC bands, created by the 1979 World Administrative Radio Conference and opened in the early 1980s. Its significance lies in its contest-free status, which provides a refuge for non-contesting operators during major international contests. The band's narrow 50 kHz bandwidth and general prohibition on voice communications (except in specific emergency or regional contexts) shape its character as a primarily digital and CW band. In most of the world, phone is not permitted, with exceptions for emergency SSB use and for a portion of Africa south of the equator during local daylight hours. Australia offers a unique voice segment for advanced license holders, while the USA imposes a 200-watt power limit. Japan restricts occupied bandwidth to less than 2 kHz. These varied regulations reflect the band's international coordination and the ongoing influence of the IARU band plans, which are recommendations rather than absolute rules in some countries. The band's legacy is as a quiet, specialized allocation that balances global amateur needs with minimal contest interference.

Did You Know?

• The 30-meter band spans 10.1–10.15 MHz, a bandwidth of only 50 kHz.
• The United States limits amateur radio users to 200 watts peak envelope power on this band.
• In Australia, advanced license holders may use voice on 10.12–10.135 MHz, though this is a recommendation only.