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Optibeam Antenna
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Optibeam - OB12-6 - 12 Element, 6 Band - 40/20/17/15/12/10
OB12-6
New product
As you know the Yagi as a symmetrical structure must always be fed using a balun at the feed point, otherwise the performance will be significantly lost.
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| Bands | 40 / 20 / 17 / 15 / 12 / 10 | |||
| Gain (dBd) * | 3,5 / 4,2 / 4,3 / 4,6 / 5,0 / 5,7 | |||
| Gain (dBi) ** | 10,3 / 11,6 / 11,9 / 12,3 / 12,7 / 13,5 | |||
| F/B (dB) | 15 / 13 / 14 / 16 / 18 / 26 | |||
| VSWR | ||||
| 40 m CW/Europe setting: | ||||
| 7,00 - 7,05 - 7,15 | 1,6 - 1,1 - 1,8 | |||
| 40 m USA phone setting: | ||||
| 7,15 - 7,20 - 7,30 | 1,6 - 1,1 - 1,8 | |||
| 14,00 - 14,18 - 14,35 | 1,4 - 1,2 - 1,4 | |||
| 18,07 - 18,13 - 18,17 | 1,5 - 1,1 - 1,2 | |||
| 21,00 - 21,25 - 21,45 | 1,5 - 1,1 - 1,2 | |||
| 24,89 - 24,94 - 24,99 | 1,5 - 1,1 - 1,2 | |||
| 28,00 - 28,50 - 29,00 | 1,5 - 1,2 - 1,7 | |||
| Elements (number) | 12 | |||
| Active Elements | 2 / 2 / 2 / 2,5 / 3 / 3 | |||
| Max. Elementlength (m) | 14.68 | |||
| Boomlength (m) | 6.1 | |||
| Turning Radius (m) | 7.95 | |||
| Feedlines (number) | 1 Coax 50 Ohm | |||
| Weight (kg) | 65 | |||
| Windload at 130 km/h | 1.504 N / 1,88 m² / 20,3 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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