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5-El.-28-Ohm 0,65m |
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5-Element-28-Ohm-Yagi for 70 cm
A second Yagi with 50 Ohm and 430-440 MHz see down!
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8x5-El.-28Ohm-Yagi at Contest-Crew DF0RW
Data of a single Yagi: Gain 432MHz = 9,1 dBd 3dB-angle hor = 48,0° 3dB-angle ver = 58,2° Feedpoint 28Ohm at 432MHz
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Elementposition |
8mm |
6mm |
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Ref |
0mm |
334mm |
336mm |
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Rad |
135mm |
308mm (10mm) |
307mm (10mm) |
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D1 |
260mm |
297mm |
301mm |
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D2 |
460mm |
292mm |
296mm |
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D3 |
630mm |
284mm |
288mm |
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Horizontal pattern at 432MHz |
Vertical pattern at 432 MHz
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5-Element-50-Ohm-Yagi for 70 cm
Broadband Yagi for use on 430-440 MHz, Gain 8,7 dBd
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Patterns for the different frequencies in the
70-cm-Band
The Yagi was not designed for DX-use, it is an uncritical Allmode-Yagi easy to build. Use a coax-choke for feeding: 3 turns RG178 on 20-mm-PVC-tube. |
Element-Lengths and Positions
| Element | Position | 6 mm | 4 mm | 3,2 mm |
| Ref | 0 mm | 332 mm | 334 mm | 335 mm |
| Rad | 155 mm | 323 mm | 325 mm | 326 mm (4mm) |
| Dir 1 | 238 mm | 298 mm | 303 mm | 306 mm |
| Dir 2 | 420 mm | 296 mm | 301 mm | 304 mm |
| Dir 3 | 590 mm | 286 mm | 292 mm | 295 mm |
