Every amateur band exists because somebody argued successfully for it, and several bands amateurs once had are gone. The pattern repeats: a commercial service wants frequencies, amateurs are a secondary or shared user, and the question asked is always the same — are amateurs demonstrably using this spectrum for something the public benefits from?
1912: pushed onto the frequencies that turned out to matter
The Radio Act of 1912 confined private stations to wavelengths of 200 meters and shorter, which the commercial and naval services of the day regarded as useless. Amateurs discovered ionospheric propagation there and crossed the Atlantic within a decade. The lesson stuck in the service's memory: the spectrum nobody wants today is not necessarily worthless tomorrow. See a history of US licensing.
1924: the first real bands
Before the treaty conferences, US amateurs were given defined allocations at 80, 40, 20 and 5 meters in 1924 — the first time the service had bands rather than a wavelength ceiling, and the moment 20 meters began its career as the workhorse DX band. Ten meters opened to amateurs in 1927.
1927: recognition by treaty
The International Radiotelegraph Conference in Washington (1927) replaced "200 meters and down" with internationally recognized amateur allocations, and established the national call-sign prefix system — needed because amateurs were by then routinely working other countries and there was no way to tell where a station was. Amateur radio stopped being a leftover and became a service with allocations set by treaty.
1979: the WARC bands
The World Administrative Radio Conference of 1979 granted amateurs three new HF allocations at 30, 17 and 12 meters, phased in through the 1980s. They are narrow, exclusive in most countries, and quiet by tradition — no contests. They were won on the strength of a documented record of amateur activity and technical contribution, which is exactly the argument the service still makes. See the WARC bands.
1988: losing 220–222 MHz
The FCC reallocated 220–222 MHz from the amateur service to land mobile use, a proceeding driven in part by a proposed commercial narrowband system. Amateurs kept 222–225 MHz. The band is the service's standing example of what happens to an allocation that looks lightly used: the loss was argued and lost largely on occupancy.
2000s: 60 meters, and channels instead of a band
US amateurs received access to five discrete channels near 5 MHz in 2003 — not a band, but individual channels shared with federal users, with a power limit and an upper-sideband convention. WRC-15 later created a small worldwide 60 meter allocation at 5351.5–5366.5 kHz; the United States kept its channelized approach. It is a good illustration of modern spectrum politics: amateurs increasingly gain access by sharing carefully rather than by exclusive allocation.
The microwave bands under pressure
- 3.3–3.5 GHz (9 cm) — the FCC moved to remove the amateur secondary allocation from
- 1240–1300 MHz (23 cm) — Europe's Galileo satellite navigation service shares this range, and
- 902–928 MHz (33 cm) — proposals to reconfigure the lower 900 MHz band for a commercial
3.3–3.45 GHz as that spectrum was cleared for commercial 5G, with a transition for existing amateur use. Weak-signal and amateur-television work on 9 cm was the casualty.
studies through WRC-23 examined amateur coexistence. The outcome was technical conditions and coordination guidance rather than removal, but the band is no longer somewhere amateurs can assume they will be left alone.
terrestrial positioning service drew heavy amateur opposition in FCC filings, on the argument that amateur mesh networking, APRS links and experimental work are real, documented uses of a shared band.
The through-line: microwave allocations are where the pressure is now, because that is where commercial demand is. See band plans and VHF/UHF and microwave operating.
Rules can expand what a band is worth
Not every fight is about frequencies. In 2023 the FCC removed the symbol-rate limit on HF data emissions, replacing it with a bandwidth limit — a rule written for 1980s teleprinters had been capping modern error-corrected data modes for decades. The band edges did not move; what amateurs could legally do inside them did. See Part 97 basics and digital modes.
Why occupancy is the argument
Amateur allocations are justified by use, and "use" has to be visible to a regulator reading comments in a docket. This is the unglamorous reason ordinary activity matters: contest logs, POTA and SOTA activations, satellite passes, mesh links and FT8 traffic are the evidence base. An empty band is an argument against itself.
Sources and further reading
- Amateur radio frequency allocations
- IARU spectrum and regulatory pages — the amateur service's own
- FCC Amateur Radio Service — dockets, orders and the
- FCC Part 97 — the
- AC6V's amateur radio history — Rod Dinkins, AC6V (SK), for the
— Wikipedia overview of the international allocation table.
representation at the ITU, including WRC outcomes.
current US rules.
allocations as they stand in law today.
early allocation dates.
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