| 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 |
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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 |
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