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VU2NAN - Nandu
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.
Telephone Drop Wire
The wire is separated into two halves to get the λ/2 radiating portion.
Low-cost HF Dipole
To arrest separation of the wire-halves at the centre point, Underwriter's Knot may be used instead of the tie.
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.
Nanda Kumar S
Ham Radio Websites World
K3WWP's QRP/CW Web Site