Amateur Radio · Visual Reference
🔌 Antenna Build Lab
New to ham radio and someone says "just throw up a wire"? This shows you what they actually mean. Pick an antenna and it draws itself — the real shape, the feedpoint, the supports — with the key lengths labeled for your frequency. A companion to the RF / Antenna calculator.
MHz
Bare wire ≈ 0.95–0.97. This trims the theoretical length to a real-world cut length.
Radiation pattern how the signal radiates — schematic
Azimuth (top-down)
Elevation (side view)
Diagrams are schematic and not to exact scale — they show the shape, feed, and key dimensions to build understanding, the way an ARRL handbook illustration does. Always verify cut lengths against a current reference and trim for lowest SWR.