Licence-Free Does Not Mean Free to Use However You Like

There is a magical moment in a radio hobbyist’s life when they discover the words “licence-free”. No amateur-radio exam. No individual station licence. Surely this is the RF playground where the spare handheld, homemade mesh box, better antenna and “just testing” amplifier can all come out to play?

Sadly, no. The useful freedom is real, but it comes with conditions. Licence-free does not mean free to use however you like. It means that the equipment and its operation must fit the permission already provided for that service—not that each operator gets to invent a reasonable-looking alternative.

That is the trap I want to untangle here. A radio can tune to a frequency, make perfectly intelligible contacts and still be the wrong equipment for that service. A wide-open VFO is not a passport.

Start With Four Separate Questions

“The band sounded empty” does not answer those questions. A protected user may be intermittent or beyond your receiver’s reach. Listening first is sensible; silence is not allocation.

Similar-Looking Services, Different Rules

So, “I brought my US walkie-talkies on holiday” needs more thought than changing the charger plug. American FRS radios are not PMR446 radios with an American accent: their frequencies and equipment rules differ. Likewise, 446 MHz is part of the amateur allocation in the United States, while PMR446 is a defined European personal-radio application around 446 MHz. Same general UHF neighbourhood; a different legal house.

PMR446 Is a Complete Operating Framework

The CEPT PMR446 decision designates 446.0–446.2 MHz for analogue and digital PMR446, with no more than 500 mW effective radiated power (ERP), hand-portable equipment and an integral antenna. It is a short-range peer-to-peer framework, not permission for base stations, repeaters or fixed infrastructure. For UK operation, check Ofcom’s IR 2030 and the applicable national authorisation rather than treating a CEPT decision as the whole UK rulebook.

For Belgium, BIPT’s PMR446 guidance explicitly requires the built-in antenna to be attached from the outset without an antenna cable, and the radio to be capable of internal-battery operation.

A fixed rooftop node or repeater is also outside that model. A particular accessory or Internet-connected application should be checked against the current national rules and the equipment’s intended use rather than assumed lawful because the RF channel is PMR446.

PMR446 is genuinely useful for simple local conversations. Use the equipment designed for that job. If the plan starts with a roof antenna and a permanent relay, choose a framework that actually permits that installation; do not try to stretch the meaning of “hand portable”.

ISM and SRD: The Free Band With Footnotes

“It is an ISM band” sounds reassuring. ISM refers to industrial, scientific and medical applications; the label is not a general communications licence. European low-power communications devices commonly use short-range-device (SRD) permissions, while many US unlicensed data radios operate under Part 15. Neither means “anything goes”.

For EU short-range devices, the current harmonised framework is Commission Decision 2006/771/EC as amended, including the 2025 update. Its table contains many distinct combinations of frequency range, device category, power and channel-access or duty-cycle condition.

For non-specific SRDs, the EU table pairs 25 mW ERP with a duty-cycle alternative of up to 1% in 868.0–868.6 MHz, but up to 0.1% in 868.7–869.2 MHz. Both entries also provide for qualifying spectrum-access and interference-mitigation techniques instead. These are examples, not a universal “868 MHz setting”: the exact category, occupied band, access method and national conditions must fit.

“My LoRa node is licence-free, so I can turn it up.” No: the relevant limit may concern power radiated by the antenna, not merely the number entered in firmware. Antenna gain matters. “I bought a US_915 board for Europe.” That region profile is not automatically transferable. Nor is every European use near 915 MHz forbidden: Europe has specific permissions in parts of that range, with different conditions. Match the exact system to the actual rule, not to three digits on the sales listing.

The 2025 EU decision states that compliant short-range devices are subject to no more than a general authorisation under national law. Belgium’s BIPT publishes the national frequency plan, interface specifications and free-use conditions. For a Belgian installation, those BIPT sources are the final practical check.

Duty cycle is a legal sharing mechanism

A duty-cycle limit counts the transmitter’s accumulated on-air time in the defined band and observation period—not just your typed message. The cited EU annex normally uses a continuous one-hour observation period unless another condition is specified. Your node’s transmitted retries, acknowledgements, forwarded packets and beacons all count. A short payload is not a short transmission when a slow mode keeps the radio on air.

Some bands permit an appropriate spectrum-access and interference-mitigation technique as an alternative to a stated duty cycle. Whether a device actually implements the required technique is an equipment and firmware question; selecting a menu option does not prove it.

CE Marking: Module Evidence Is Not a Blank Cheque

“But I bought it online, and it has CE on the board.” Online checkout is not a spectrum licence. A product listing and a logo do not tell you whether the exact finished device, antenna and firmware configuration have the required conformity evidence.

EU market conformity and permission to use spectrum are related but distinct layers. Under the Radio Equipment Directive, a manufacturer placing radio equipment on the EU market must assess the radio equipment, draw up an EU Declaration of Conformity and take responsibility for compliance. The assessment must consider intended operating conditions and, where relevant, possible configurations.

A compliant radio module can make the integrator’s job easier, especially when it is installed exactly within the module manufacturer’s documented antenna, layout, power-supply, enclosure and software conditions. It does not automatically cover every finished product built around it.

“The LoRa module has CE, so my Meshtastic box is CE.” Not automatically. The module may be fine while a different antenna, noisy supply or altered RF layout changes the finished system. Follow the integration conditions and establish which evidence covers the complete box. A board marked “868 MHz” is a capability, not a compliance report.

Private experimentation and placing equipment on the market are distinct legal acts, but “I built it myself” is not a general radio-equipment exemption. Any applicable exemption has its own scope; spectrum-use conditions still apply. The Radio Equipment Directive addresses both market availability and putting radio equipment into service.

United States: “No Individual Licence” Still Means Part 95

The FCC’s Part 95 framework authorises eligible users to operate many Personal Radio Services without individual licences, subject to the rules for the service. GMRS is an important exception because it requires an individual licence.

FRS

Current FRS rules specify 22 shared channels. ERP is limited to 0.5 W on channels 8–14 and 2 W on channels 1–7 and 15–22. An FRS transmitter must have a non-removable integral antenna, must not transmit outside the FRS channels and must meet the applicable equipment-certification requirements. FRS data is narrowly defined; store-and-forward packet operation is prohibited.

Consequently, a wideband amateur handheld with a removable antenna is not converted into an authorised FRS transmitter by programming an FRS frequency and selecting low power.

MURS

MURS provides five VHF channels and permits voice, data, image, telecommand and telemetry within its rules. It does not permit repeater stations, signal boosters or store-and-forward packet operation. Its antenna-height, transmitter-certification and other service rules remain applicable even though an individual operator licence is generally not required.

CB

US CB rules define a CBRS station as an FCC-certified transmitter. They specifically prohibit using non-CB transmitters—including transmitters intended for amateur service—on CB channels, and prohibit external RF power amplifiers. Other countries have their own CB channel, mode, equipment and power rules, so a US CB configuration must not be assumed legal in Europe or the UK.

“My HF transceiver can transmit on 27 MHz.” That establishes capability, not CB authorisation. An opened-up amateur transceiver is not automatically compliant CB equipment. Nor does a quiet spot just beyond the CB channels become an extra channel because everybody nearby missed it.

Meshtastic and MeshCore Do Not Determine Legality

Meshtastic, MeshCore and similar projects make radio approachable, useful and fun. That is worth celebrating. They provide software and protocols; they do not grant spectrum rights. The lawful RF configuration still depends on the country, band, equipment, antenna, radiated power, bandwidth, duty cycle or channel-access method, unwanted emissions and how the node operates.

The region setting is not decoration. The antenna is not legally invisible. And the amplifier is not forgiven because the project is open source.

A licensed amateur may be able to run compatible mesh technology on an amateur allocation, but then amateur-service rules apply. Identification, permitted message content, third-party traffic, automatic operation, encryption and unattended stations are jurisdiction-specific; an amateur licence does not extend PMR446, SRD, FRS or CB privileges.

That is the ham-radio trap: knowing how a radio works can make us overconfident about where we may use it. An amateur licence gives substantial privileges within its scope. It does not give diplomatic immunity.

Antennas, Amplifiers and Filtering

Changing an antenna can change ERP or EIRP and can move the equipment outside the configuration covered by its conformity or certification. Where a service requires an integral antenna, replacing it with a connector is a more fundamental change than simply “improving range.”

An external amplifier can increase wanted power, harmonics, spurious emissions and broadband noise. It may also be explicitly prohibited, as it is for US CB. A receiver display or antenna analyser cannot establish transmitter spectral compliance; proper conducted or radiated measurements require suitable RF test equipment and methods.

“My 433 MHz board transmits on 433 MHz.” Good. What else does it transmit? The wanted signal is only part of the story. Better range is not evidence that the harmonics, unwanted emissions or radiated-power limits are satisfied.

A Defensible Pre-Transmit Checklist

1. Identify the country and service. Do not begin with frequency alone.
2. Read the current regulator or official rule. Check national implementation as well as a regional recommendation.
3. Verify the exact equipment identity. Find its Declaration of Conformity, certification identifier, instructions and permitted configurations.
4. Check the antenna and radiated-power limit. Connector type, antenna gain and cable loss can matter.
5. Check bandwidth, duty cycle and channel access. Include beacons, acknowledgements, retries and routed traffic.
6. Check the application. Fixed infrastructure, repeaters, store-and-forward, automatic operation or encryption can change the answer.
7. Reassess modifications. A different antenna, amplifier, filter, firmware region or power supply can invalidate earlier evidence.

The VFO Turns; The Rules Do Not Turn With It

Licence-free radio is wonderful precisely because ordinary people can use useful communications equipment without an individual licensing process. Keep that advantage: choose a compliant PMR446 set for simple local voice, CB equipment for CB, or a documented SRD configuration for a mesh—not a modified radio followed by a search for an excuse.

The freedom is to operate within the conditions. Read the instructions, check the official service rules and respect the shared spectrum. A €12 board with a mystery CE mark is not a European harmonised standard. It is still a €12 board with a mystery CE mark.

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