What changed
Kits and homebrewing — edited Aug 31, 2026 by Unknown editor
This is the first recorded version, so every line is shown as added. Note: Imported from content/wiki
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Amateur radio is one of the last services where you may legally design, build and put your own
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transmitter on the air. Building is also the cheapest way to understand what the manuals are
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talking about.
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## Start with a kit
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Kits give you a known-good design and a parts list, so a failure is your soldering rather than your
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math. Reasonable progressions:
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1. A code-practice oscillator, keyer or antenna analyser adapter — an evening's work.
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2. A QRP transceiver: the QCX-series CW rigs, Pixie or Rockmite for a few dollars, uBITX or
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(tr)uSDX for a multiband SSB radio.
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3. An antenna tuner, balun, common-mode choke or dummy load — all more useful than they look.
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4. A signal generator, noise bridge or NanoVNA-based test setup for the bench.
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Club build nights are the fastest way to learn; see [clubs](/wiki/clubs).
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## Tools worth owning
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A temperature-controlled soldering iron (not a fixed 30 W pencil), decent 63/37 or lead-free solder,
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flux, side cutters, a multimeter, and eventually a NanoVNA and a cheap oscilloscope. Surface-mount
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work needs hot air, tweezers and magnification, but is far less scary than it looks.
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## Homebrew from scratch
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- Start from a published, tested design — the ARRL Handbook, QRP club journals, and countless
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personal sites carry them.
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- Simulate first: LTspice for circuits, EZNEC or 4nec2 for antennas, KiCad for boards. See
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[software](/wiki/operating/software).
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- Build on copper-clad board ("ugly" or Manhattan style) before committing to a PCB.
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- Test into a dummy load, and check for harmonics and spurious emissions before you transmit —
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§97.307 spectral purity requirements apply to gear you built yourself.
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## Safety
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- Tube gear and amplifier power supplies hold lethal voltages after switch-off. Bleed resistors
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fail. One hand in a pocket, and never work alone on high-voltage equipment.
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- Solder fumes are flux, not lead — but ventilate anyway, and wash your hands.
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- Lithium batteries need the right charger and a fireproof place to charge; see
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[power and batteries](/wiki/station/power-and-batteries).
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- Antenna work is the most dangerous thing most amateurs do. Nothing goes up near a power line, and
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towers get harnesses and a second person — see
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[grounding and lightning](/wiki/station/grounding-and-lightning).