End-fed Half-wave 40-10

Homebrew · EFHW 40-10
Category
antenna
Manufacturer
Homebrew
Model
EFHW 40-10
Acquired
2024
Bands
40m, 20m, 15m, 10m
Modes
SSB, CW, FT8
Max TX Power
25 W
Portable / Field Use
Yes
Personal Rating
5 / 5

Twenty metres of wire on a Kevlar winder with a 49:1 UnUn. The field workhorse — multiband, light, and forgiving of imperfect sky hooks.

If the IC-705 is the brain, the EFHW is the lungs. It’s the first thing into the pannier and the last thing out of the tree. Sloping, inverted-V, vertical against a squid pole — the pattern changes but the radiation is always there.

The UnUn is shrink-wrapped inside a project box with a BNC and a dainty SWR readout slot for the trailside. The counterpoise is roughly a quarter wave and terminates in a knot — sophistication optional.

Used on these activations