Simple HF Antenna for the 20-, 17-, 15-, 12- and 10- meter Band

By: Andrey Korsakov, RA4NF

Credit Line: www.cqham.ru

Below described a very simple HF Antenna for the 20-, 17-, 15-, 12- and 10- meter Band. Antenna is fed by 50- Ohm coaxial cable. Antenna has very simple design and does not require any tuning if it made according the drawing.Figure 1 shows design of the antenna.

The Antenna consists of two vertical radiators that upper ends stand on distance 1.2... 1.5-meter apart together. It is an optimal distance for the antenna. However it is possible do not use the upper boom and place the radiators in triangle as it shown in dotted line in Figure 1. Two counterpoises are used for each band. Counterpoises should be placed at 15... 20 degree to horizon.

The two antenna Radiators fed by 150- Ohm two wires line. The line consists of from bottom antenna wire and wire in thick plastic insulation that is wound around the bottom line (marked in red on Figure 1). Length of the wire should be near in 20 percent more the lower parts of the antenna.

Mast and upper boom may be made from any insulation stuff- wood or plastic. Lower horizon wire of the antenna should be placed at some height above the ground. One meter should be enough (more is better). Antenna may be scaled to another ham HF bands.

73! RA4NF

Figure 1 Simple HF Antenna for the 20-, 17-, 15-, 12- and 10- meter Band

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