HF Antennas

Raffaello Tesi

Length of a half-wave dipole

The physical length of a half-wave long dipole must respect the relation:

Length (meters) = 142 / frequency (MHz)

 

QRG

1.8 MHz

3.8 MHz

7.05 MHz

14.2 MHz

18.1 MHz

21.1 MHz

24.9 MHz

28.5 MHz

L (m)

78.9 m

37.4 m

20.1 m

10.0 m

7.8 m

6.7 m

5.7 m

4.9 m

L (ft)

260′

123.1′

66.4′

32.9′

25.8′

22.2′

18.8′

16.4′

Source: http://astrosurf.com/luxorion/qsl-antenna.htm

 

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