5-Element-28-Ohm-Yagis with 4.50-m- and 4,80-m-Boom
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First Yagi with 4,5-m-Boom, second see down! Short data: Gain 8.58 dBd, F/B > 25 dB, Great Bandwidth, good pattern >1500KHz (49.5-51 MHz) at SWR < 1.5 Link: A step-by-step description of building this Yagi by Ian, S55O with good pictures
The Yagi on the left photo was built by Peter, DK7SP
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The 5-Ele. by Graeme, VK3GOM |
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The 5-Ele. built by Stefhan, SM4TZZ
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The 5-Element- Yagi built by Sergio, CT1EWX
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The 5-Element-Yagi built by Vel, 9A2VJ
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| Yagi built by Craig, ZS5CID
With that position on the ladder he copied the SV- and 5B4-Beacon at the first test! |
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The Radiator-Box in the Yagi of Craig, ZS5CID |
Element-lengts and positions, for the radiator construction see the 50-MHz-main page! Data updated 18-July-2011
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Element |
Element-position |
Element-length (12 mm) |
Element-length (10 mm) |
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R |
0 mm |
2950 mm |
2960 mm |
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DE |
615 mm |
2900 mm (16+12 mm) |
2900 mm (16+12 mm) |
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D1 |
1310 mm |
2730 mm |
2740 mm |
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D2 |
2960 mm |
2680 mm |
2690 mm |
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D3 |
4480 mm |
2630 mm |
2640 mm |
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Match with 2xLambda/4 75-Ohm-coax in parallel to a grounded socket, feedpoint impedance 50Ohm. This antenna was designed for mounting 1,50-1,80 m above a shortwave-beam without detuning, this yagi has a great bandwith and is uncritical in the data. |
5-Element- 28-Ohm-Yagis with 4.80-m-boom (Version 2)
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Very broadband version for mounting 1,5 m above a shortwave beam Short data: Gain 8,72dBd, F/B 24dB, bandwidth > 1,4 MHz at SWR < 1.5 |
Element-lengts and positions, for the radiator construction see the 50-MHz-main page! Data updated 18-July-2011
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Element |
Element-position (mm) |
Element-length (12 mm) |
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R |
0 |
2980 |
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DE |
880 |
2892 |
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D1 |
1740 |
2740 |
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D2 |
3350 |
2710 |
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D3 |
4800 |
2620 |
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Match with 2xLambda/4 75-Ohm-coax in parallel to a grounded socket, feedpoint impedance 50Ohm. |
