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The Yagi built by Nelu, YO9DL |
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Dualband 12/17m |
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DK7ZB-Dualband-Beam 12/17 m
The beam has only one feedpoint with 50 Ohm and has an open-sleeve element for 12 m
12 m: 4,39 dBd 11,5 dB F/B
17 m: 4,15 dBd 11 dB F/B
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The Yagi built by Nelu, YO9DL |
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The scheme of the beam with the currents for 24,9 MHz
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Element lengths for the two bands, keep the outer tubes 15 cm longer for the overlap. The open-sleeve-element for 12 m and the reflectors can be mounted direct above the boom (metallic connection), but do not use big metallic brackets. This can detune the beam! |
Feeding with a current balun
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The mechanical soultions for the element holding from Nelu, YO9DL |
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