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Optibeam Antenna
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Optibeam - OB4020 - 8 Element Duo Monobander 40/20 - 40/20
OB4020
New product
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| Bands | 40 / 20 | |||
| Gain (dBd) * | 4,8 / 8,4 | |||
| Gain (dBi) ** | 11,3 / 15,6 | |||
| F/B (dB) | 25 / 27 | |||
| VSWR | ||||
| 40m CW/Europe setting: | ||||
| 7,00 - 7,05 - 7,20 | 1,7 - 1,05 - 2,0 | |||
| 40m USA phone setting: | ||||
| 7,15 - 7,21 - 7,30 | 1,7 - 1,05 - 1,6 | |||
| 14,000 - 14,250 - 14,350 | 1,2 - 1,05 - 1,3 | |||
| Elements (number) | 3 / 5 | |||
| Max. Elementlength (m) | 14.54 | |||
| Boomlength (m) | 15.1 | |||
| Active Boomlength (m) | 12,30 / 15,00 | |||
| Turning Radius (m) | 9.45 | |||
| Feedlines (number) | 2 Coax 50 Ohm | |||
| Weight (kg) | 105 | |||
| Windload at 130 km/h | 1.761 N / 2,20 m² / 23,61 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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