What does wavelength mean?
Wavelength is the distance a radio wave travels during one cycle. As frequency rises, wavelength gets shorter. Use our wavelength calculator for a free-space estimate.
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Why does antenna length matter?
Antenna dimensions affect how energy couples to the radio system. Calculator lengths are starting points; real installations depend on antenna design, surroundings and matching. Follow the radio and antenna manuals.
What does SWR tell me?
SWR compares forward and reflected energy in a feed system. A high reading can indicate a mismatch or problem. Stop and check connections and equipment limits rather than transmitting into a setup you suspect is faulty.
Why can I hear distant stations?
Propagation depends on frequency, time, solar and atmospheric conditions, terrain, antennas and noise. A forecast is a guide, not a promise. Check DX & propagation links.
Can I transmit on this radio?
That depends on the radio, frequency, mode, power and where you are. For UK CB, only equipment meeting current requirements qualifies for licence-exempt operation. Check Ofcom’s current guidance and the exact radio manual.
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