Find the locator
The site names a Maidenhead locator, you find it on the map or the globe. Four levels, ten zones (from the whole world to around JN18FS), hints that cost points, against the clock if you dare.
4 levels10 zones23 badges
F4IOZOlivier · radio amateur · JN18FS
Notice:
LIVEGames around radio: locators, DXCC, Q codes, the phonetic alphabet, bands and modes, satellites to catch, their frequencies, their orbits and their fact files, Doppler and an antenna to point, morse and pile-ups, QSOs to save, a station to wire, an antenna to tune, a fox to hunt, telemetry to decode. Every game fills your QSL album. Your games, records and badges stay in your browser.
The site names a Maidenhead locator, you find it on the map or the globe. Four levels, ten zones (from the whole world to around JN18FS), hints that cost points, against the clock if you dare.
4 levels10 zones23 badges
A callsign, four flags: which DXCC entity is it from? Or the other way round. Combos, streaks, three lives or against the clock, from the common prefixes to the rarest.
2 ways3 levels15 badges
QRZ? QSL! 73… A code, its meaning, or the other way round — and for experts, the question (QRS?) or the statement (QRS). Combos, three lives or against the clock.
63 codes3 levels10 badges
Alfa, Bravo, Charlie… Spell a callsign word by word, read spelled words back, or listen to them in the browser's voice — with some QSB for the seasoned.
3 wayslistening and QSB10 badges
The dial turns, the frequency shows: which band, from 160 m to QO-100? Then which segment of the band plan, or which exact use: FT8, the ISS, beacons… (IARU Region 1).
16 bands3 levels11 badges
CW, FT8, RTTY, SSTV, packet, WSPR… A few seconds of signal made in the browser, its waterfall scrolling: by ear, which mode? With some hiss if you dare.
10 modeswaterfall10 badges
A real satellite passes over JN18FS on fast-forward: tap right at AOS, then at LOS. Perfect, combos, and a crowd of satellites where only one counts.
4 levelsreal passes11 badges
A satellite is named: turn the yagi to it, azimuth and elevation, before time runs out. Then follow one through a whole pass, as a rotor does.
4 modessky dial11 badges
Up on UHF, down on VHF? FM repeater, linear transponder, APRS, SSTV… From its frequencies and its mode, find the satellite — or the other way round. The expert follows an inverting transponder.
7 satellites3 levels11 badges
Real orbits head to head: which flies higher, goes faster, laps the Earth first? The rings race round the Earth. Rank them, guess the height by eye.
duelsKepler11 badges
Tilt, thrust, cut-off: put a satellite into low orbit like the ISS, into sun-synchronous orbit, then up to QO-100 by a Hohmann transfer. Too fast, it escapes; too slow, it falls back!
4 missionsNewton10 badges
A real satellite over the Earth: paint the area that sees it, the true footprint opens over it. At the horizon or above 10°, and two stations: can they talk?
4 levelsreal satellites10 badges
Launched when, how many years ago, before or after the other? 1U, 3U or crewed station? SSTV or SSDV? The fact files of the picture satellites and the amateur satellites, the time line and the stacking cubes.
32 satellites3 levels11 badges
Build a 1U within its mass and volume, keep the battery between day and eclipse, download the pictures before the pass ends, save it from failures down to re-entry. Cards of real CubeSats to collect.
5 levels32 cards11 badges
A practice CubeSat's frames: voltage, panel currents, charge, temperatures. Find the fault, or spot the false alarm, and read why.
5 levelsfaults and false alarms9 badges
The site keys in morse, you type what you hear: callsigns, words, Q codes. From 12 to 40 WPM, adaptive speed, noise and QSB, and the Koch method to learn.
12 to 40 WPMKoch method11 badges
QRM, QSB, a pile-up, a sagging battery, a rising SWR, a storm, an emergency call: four possible reactions to each incident, only one really saves the QSO.
4 levels20 incidents9 badges
Power supply, radio, meter, tuner, preamplifier, rotor, PC: wire the right sockets. The validator explains every mistake, from the forgotten fuse to the preamplifier on the transmit side.
5 stationsno drag and drop9 badges
A coil, a capacitor, an L network: bring the SWR to 1 watching the Smith chart, or recognise the antenna no tuner can match.
5 levelsSmith chart9 badges
More games will come here.
Your games, records and badges are kept in this browser only: nothing is sent to the site.