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2-Element-28Ohm-Yagi Version 1 (144-146MHz) (Version 2 for SSB see down)
Gain 4,3dBd, F/B 14dB, Boom 210mm, director mounted with Polyamid-clamp
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2-Element-28Ohm-Yagi Version 1 (144-146MHz) (Version 2 for SSB see down)
Gain 4,3dBd, F/B 14dB, Boom 210mm, director mounted with Polyamid-clamp
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If the radiator is mounted vertically 480mm in front of a metal support as shown in the picture , the gain is 5dBd at 23dB F/B. First correct the length of the radiator for best SWR, then change the distance to the support, if SWR not <1,2
| Radiator (10mm) | Director (10mm) | Distance Rad-Dir | Distance rad-mast |
| 1002mm | 918mm | 210mm | 480mm |
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Elevation plot of the 2-Element- Yagi,
mounted vertically 480mm in front of a metal support (as shown in the
photo above).
Gain 5dBd, F/B 23dB |
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Azimuth plot of the vertically polarized 2-Element-Yagi |
Plots for free space without mounting in front of a metal support (or horizontally polarized with a vertical support), radiator and director are a little bit longer
| Radiator (10mm) | Director (10mm) | Distance Rad-Dir |
| 1010mm | 920mm | 210mm |
2-Element-28Ohm-Yagi (144,3MHz SSB)
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Stacking distance for two 2-Element-Yagis must be 1,70m
Element-Positions (drill-holes)
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| Gain | 3dB hor | 3dB ver | |
| 1x2-El | 4,4dBd | 68,2° | 131,8° |
| 2x2-El | 8,0dBd | 68,6° | 34,6° |
Very important: The elements lengths are different for a single Yagi and the stacked version. The interaction between the two antennas results in complete other lengths!
You cannot prove one Yagi of the stacked version alone, they must be assembled as stacked array with 1,70m distance (no less, no more!).
Element-Lengths for using as a single Yagi
| Rad | D1 | |
| 6mm | 1016mm | 938mm |
| 8mm | 1013mm | 930mm |
Element-Lengths for using as a 2x stacked Yagi-group
| Rad | D1 | |
| 6mm | 1011mm | 946mm |
| 8mm | 1008mm | 938mm |
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