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Optibeam Antenna
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Optibeam - OB4-40 - 4 Element Yagi 40m - 40
OB4-40
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| Bands | 40 | |||
| Gain (dBd) * | 5 | |||
| Gain (dBi) ** | 11.9 | |||
| F/B (dB) | 25 | |||
| VSWR | ||||
| 7,00 - 7,06 - 7,10 - 7,15 - 7,20 - 7,30 | 1,5 - 1,1 - 1,2 - 1,2 - 1,1 - 1,3 | |||
| Elements (number) | 4 | |||
| Max. Elementlenght (m) | 14.74 | |||
| Boomlenght (m) | 11.9 | |||
| Turning Radius (m) | 9.45 | |||
| Feedlines (number) | 1 Coax 50 Ohm | |||
| Weight (kg) | 80 | |||
| Windload at 130 km/h | 1.200 N / 1,49 m² / 16,2 feet² | |||
| * = average gain over dipol in free-space / for comparison: 2 el monobander 4 dBd, 3 el 5-6 dBd |
| ** = average gain at 20m above ground (= dBd + 2.15 dB isotropic + about 5 dB ground reflection) |
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