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EA3AIL station · Catalonia
Everything you need to put up an antenna and get on the air
HF antenna calculators that draw what you compute, a forum to talk it over with other operators, and a weekly newsletter about what the bands are doing.
Quick calculator
Wavelength—
Half-wave dipole—
Each leg—
Quarter-wave vertical—
HF antenna calculator
Dipoles, verticals, EFHW, loops, Yagis and coil-loaded shortened antennas. Move one slider and the drawing, the radiation pattern and the efficiency update instantly.
Community forum
Sign up with your callsign and ask questions, show off your builds, or tell us about that DX that took you three nights.
Weekly newsletter
One short email a week: propagation, an antenna worth trying and what is coming up.
Bench tools
Coax loss, SWR, power conversion, Maidenhead locator and distance between stations.
Region 1 HF bands
Pick a band to open the calculator with the frequency already set.
Latest on the forum
Forum1 threads · 1 posts · 2 members