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You don't need the whole vocabulary. You need about twenty words.
Ham radio has a reputation for being impenetrable, and the licence exam doesn’t entirely help. It front-loads you with theory you won’t touch for months and skips most of what operators actually say to each other.
The gap shows up fast. You pass, you buy a radio, you switch it on, and the first thing you hear is somebody talking about their SWR being high on forty and whether the band is long tonight. None of that appeared on the test in those words.
These twenty come up first. Some describe what your equipment is doing, some describe what other operators are doing, and a few are names for modes you’ll hear mentioned long before you try them. Where a word doubles as on-air slang, the glossary covers that side of it.
What the radio is actually doing
Frequency
The rate at which a radio wave oscillates, measured in hertz. You will see it in kilohertz down on the low bands and megahertz almost everywhere else. In practice it is simply the number you dial in. 146.520 MHz is a frequency, and it happens to be the national 2-meter simplex calling channel.
Band
A range of frequencies set aside for a purpose. Hams talk about bands in wavelengths rather than numbers, so you will hear 2 meters, 20 meters, 70 centimeters. Each one behaves differently. Two meters is essentially line-of-sight and is where local repeater work happens. Twenty meters can put you into another continent in daylight. Choosing a band is mostly a question of how far you want to be heard.
Transceiver
A transmitter and a receiver in one box, which is what nearly every modern radio is. You will hear it shortened to rig. The distinction only really matters when somebody mentions a separate receiver, which usually means they are talking about older equipment.
Antenna
The part that does the actual work. A good radio feeding a poor antenna will disappoint you far more than a cheap radio feeding a good one, which is the single most useful thing to know when you are deciding where the money goes. Everything below about dipoles, Yagis and SWR is really about getting this part right.
The gear words
Dipole
Two lengths of wire fed in the middle, cut to suit the band you want. It is the simplest antenna that works properly, and it is still what a great many experienced operators use on HF. If somebody suggests you start with a dipole, they are not being cheap on your behalf. They are being practical.
Yagi
A directional antenna built from a driven element, a reflector behind it and one or more directors in front. It concentrates your signal in one direction rather than spreading it everywhere, which makes you louder where you are pointing and quieter everywhere else. That is why they sit on rotators.
SWR
Standing Wave Ratio, a measure of how well your antenna system matches your radio. A low figure means power is leaving the antenna. A high figure means some of it is coming back down the coax instead, where it is wasted and can damage the radio’s output stage. It is the first number to check when something is not working.
VOX
Voice Operated Switch. The radio keys itself when you start speaking, so you are not holding the PTT. Genuinely useful in a vehicle or with a headset, and a reliable way to transmit things you did not intend to transmit if you leave it switched on around other people.
Mobile
Operating from a vehicle, and also how you identify yourself while doing it. Saying your callsign followed by mobile tells the other station you are driving, which is a useful hint that you may drop out and that it is worth keeping things simple.
IF YOU ONLY LEARN FIVE
Band, antenna, SWR, net and CQ
Those five will carry you through your first month. Band tells you where to listen. Antenna and SWR between them decide whether anybody hears you at all. A net is the easiest place in the hobby to make a first contact, because somebody is actively asking for check-ins and nobody minds a nervous one. And CQ is what you say when you are ready to stop listening and start calling.
The other fifteen you will pick up by hearing them, which is how most of this is learned anyway.
What people say to each other
CQ
A general call to anybody listening. On HF you will hear it as CQ CQ CQ, this is, and then a callsign, repeated until somebody comes back. It is a fishing expedition rather than a call to a particular person.
QSO
A contact. A conversation with another station, however brief. Saying you had a QSO with Japan last night means one exchange took place. It does not imply you talked for an hour.
DX
Distance, meaning a long-haul or foreign station. Chasing DX is an entire branch of the hobby, and a large share of HF activity is people trying to work stations far enough away to be interesting.
Ragchew
A long, unhurried conversation, the opposite of a contest exchange. If somebody says they are ragchewing, there is no particular purpose to it and you are welcome to join in.
Net
A scheduled on-air gathering with somebody running it. There are traffic nets, emergency nets, technical nets and purely social ones. Checking into a local net is the easiest way to make your first contacts, because someone is explicitly asking for them and expecting new voices.
Pileup
What happens when a rare station appears and everybody calls at once. It sounds like chaos because it is. The skill is in listening for how the DX station is working the pile rather than simply transmitting louder than everyone else.
Modes you'll hear mentioned
CW
Continuous Wave, which in practice means Morse code. It has not been required for a licence in the United States since 2007 and it is still very much in use, because putting all your power into a very narrow signal gets through when voice will not.
QRP
Low power operation, generally taken to mean five watts or less. It is a deliberate constraint, a bit like fly fishing. Working somebody a thousand miles away on five watts is a considerably bigger deal than doing it on a hundred.
RTTY
Radio Teletype, a digital mode that predates home computers entirely. It sends text as shifting tones, and you will mostly run into it during contests.
SSTV
Slow-Scan Television, which sends still images over radio one line at a time and takes a couple of minutes per picture. The International Space Station transmits SSTV images during certain events, which makes a good first target if you want to try receiving one.
APRS
Automatic Packet Reporting System. Position, weather and short messages sent as data rather than voice. It is how stations show up on a map, and it is what your radio is doing when it beeps and briefly displays somebody else’s callsign.
WHERE TO GO NEXT
The rest of the vocabulary, in three places
Acronyms and Q Codes
Sixty-odd abbreviations, from RF and SWR through to POTA and EMCOMM, plus all thirty-six Q codes with the question each one asks. There is a printable Q code sheet at the top.
The On-Air Glossary
Forty-seven pieces of operating slang, the words people actually say rather than the ones in the study guide, each with a line showing how it sounds in use.
The Reference Library
A hundred and six entries in one place, each with an example of how it sounds on the air. Searchable inside Pocket Elmer, which is the version to have open while you are listening.
Knowing the words is the easy half
Pocket Elmer looks at the licence you actually hold and the radio you actually own, tells you what you can do with it right now, and gives you the words to say when you get there. It runs in a browser, on a phone, at the radio.