Low-cost ½ λ Dipole for HF QRP rigs

Here’s an economical dipole for simple QRP HF homebrew rigs. It’s a one-piece radiator/feeder arrangement made of surplus insulated telephone drop wire with twin copper-clad steel cores.

The wire is separated into two halves to get the λ/2 radiating portion. The centre point is tied with string to arrest separation.

The end insulators are scrap bakelite pieces drilled to take the wire and string. Banana plugs are used at the rig-end.

Works real good when strung high up between two trees or other supports.