Theory of the Quadlongs 4/6-m-Quadlongs 2-m-Quadlong 2-m-4x-Quadlong 2-m-4x-Oblong The Hentenna (2 m, 4m, 6 m)

The DK7ZB-Quadruple-Oblong for 144 MHz

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Antenna Gain

5,6 dBd (in two directions)

Horizontal 3-dB-angle

88,0

Vertical 3-dB-angle

36,8

Impedance

47 +/- j 0 Ohm at 145 MHz

Bandwidth for SWR < 1,5

Theoretical 3,25 MHz, measured > 4 MHz

Horizontal Dimension

29,5 cm

Vertical Dimension

286,5 cm

Weight with connection box

230 g

Lengths of the wires in the Quadruple Oblong. First number of the length is for 145 MHz, the second for 144,3 MHz.

The choke consists of 5 turns PTFE-50-Ohm-Koax on a 25-mm-PVC-tube.

Dimension

Section

Length

Material

Horizontal

3, 4, 6, 9, 12

292 mm (293 mm)

4x1mm brass tube

Vertical

1, 2, 5, 7, 8, 10, 11, 13

714 mm (716 mm)

2-mm-Cu-braid