Radio comms in airsoft: PMR446, headsets and PTT
a radio is the cheapest upgrade that genuinely makes your team better. not your new hop-up rubber, not your 400-euro replica. just knowing where the rest of your squad is.
but there's a legal side to it that a lot of people don't know, and there's a lot of nonsense talked at fields about "channel 8 with subcode 12". so let's get it straight.
PMR446: the european licence-free band
PMR446 is the european harmonised licence-free two-way radio standard. if you're in europe, this is the band you use without a licence.
the conditions for licence-free use:
- frequency range 446.0 to 446.2 MHz
- maximum 500 mW (0.5 watt) e.r.p. transmit power
- fixed, non-detachable antenna. separate or extended antennas are not allowed
- the equipment has to be PMR446-certified
- no repeaters, no external antennas
analogue PMR446 has 16 channels. there's also digital (dPMR446) with more channels, which is also licence-free within the same conditions.
this applies to both private and business use. you don't need a licence.
if you're not in europe: the equivalent is your local licence-free band, for example FRS/GMRS in the US. the exact frequencies, power limits and whether a licence is needed differ per country, so look up your national rules rather than assuming the PMR446 numbers above carry over. i'm not going to invent specifics for bands i don't operate on.
what's NOT allowed, and why it can get you fined
this is the part where fields get it wrong most.
Baofeng UV-5R and similar. these things cost 25 euros and everyone has one. the problem: they transmit on far more than 446 MHz, have a detachable antenna and often transmit at 4 or 5 watts. that means they don't meet the licence-free conditions, even if you set one to a PMR frequency. there are 446-only versions on the market, but the standard UV-5R isn't one.
transmitting outside your permitted bands without authorisation is an offence under radio regulations in most countries. in practice you don't get checked at an airsoft field, but the 446 band sits next to bands that are used for serious purposes. i'll just say it: buy a proper PMR446 set and you never have to think about it.
replacing the antenna on a PMR set. the moment you modify the antenna, you fall outside the licence-free rules.
if you want more range and more freedom: get your amateur radio licence, or use a set that's licensed for the bands you want. that's overkill for most airsofters.
note: laws and regulations change, and they vary by country. when in doubt, check the current text from your national radio regulator rather than a forum post from 2019.
channel and subcode: how it actually works
a "subcode" (CTCSS or DCS) is not a private channel. it's a filter that decides which messages your radio lets you hear. everyone on the same channel with a different subcode is still transmitting on exactly the same frequency, so you do get in each other's way.
practical result on a field with 200 people: if two teams pick channel 8 with different subcodes, you can't hear each other but you do block each other. that's why good organisers assign channels. just ask at the briefing.
range: expect 200 to 800 metres in woods. not the "10 km" on the box, that's line of sight from mountaintop to mountaintop.
headsets: which types and what works
throat mic. picks up vibrations in your throat. works well when you whisper and there's a lot of background noise. downside: it has to sit tight and that's uncomfortable, and a lot of people come across unintelligible on it.
bone conduction. more expensive, more comfortable, sound through your cheekbone. good option if you wear a helmet.
ear-mic / D-shape earpiece with inline PTT. the simplest and cheapest. for 20 euros you have something usable. downside: that mic block dangles on your chest and catches wind.
headset under hearing protection. if you wear Comtacs or Sordins, pick something that connects to them. doubling up over your ear doesn't work.
important point for airsoft: keep at least one ear free. you need to be able to tell where sound is coming from. a closed double headset makes you as good as deaf in the woods to someone coming from your left.
PTT: push-to-talk
a separate PTT button on your rig or shoulder strap is worth it. fumbling for the button on your radio in your pouch while you run doesn't work.
where to put it: on your chest strap or on top of your shoulder, on your weak-hand side. your strong hand stays on the replica.
watch the connector. Kenwood 2-pin is the most common, Motorola and Icom use other plugs. buy a headset and PTT that match your radio, and check that before the game day.
comms discipline: where most teams fail
radios only make a team better if everyone sticks to a few rules.
- think first, then transmit. form the sentence in your head. half sentences cost everyone time.
- who, where, what. "Tim, north side of the bunker, three moving toward the bridge." not "uh, they're coming".
- only transmit when it matters. kills and frustration don't belong on the radio.
- one person speaks for the squad to command. otherwise it's chaos.
- acknowledge. a short "copy" is enough. without acknowledgement the sender doesn't know it got through.
- assume you're overheard. on an open channel the opposition just listens in. that's not cheating, that's how radio works. play smart with it.
practical tips
- bring spare batteries. a radio that starts at 60% won't make a full day.
- set your volume before the game. a screaming radio gives away your position.
- agree within the team that everyone runs the same subcode, not just the same channel.
- waterproofing is nice in a wet climate. IP54 or higher.
- test it together in the safe zone, not on the field.
budget
a usable set (radio, headset, PTT) starts around 60 to 100 euros per person. above 200 euros you're mostly buying ruggedness and better audio, not more range, because that power is fixed at 500 mW anyway.
sources
Also on Airsoft-FOB
- also available in dutch: Radiocommunicatie in airsoft: PMR446, headsets en PTT