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Optibeam Antenna
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Optibeam - OB804030-Triband-Yagi 80-40-30m-80 (multi switch)
OB804030
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 | 80 (multi switch) / 40 / 30 | |||
| Gain (dBd) * | 3,3 / 3,6 / 3,7 | |||
| Gain (dBi) ** | 9,7 / 11,0 / 11,4 | |||
| F/B (dB) | 18 / 14 / 16 | |||
| VSWR (with the OptiBeam multi switch): | ||||
| 80m SSB 1: 3,780 - 3,795 - 3,840 | 2,0 - 1,1 - 2,0 | |||
| 80m SSB 2: 3,735 - 3,755 - 3,800 | 2,0 - 1,1 - 2,0 | |||
| 80m SSB 3: 3,695 - 3,715 - 3,765 | 2,0 - 1,1 - 2,0 | |||
| 80m CW: 3,500 - 3,518 - 3,555 | 1,7 - 1,3 - 2,0 | |||
| 40m: 7,000 - 7,080 - 7,200 | 1,7 - 1,2 - 2,0 | |||
| 30m: 10,100 - 10,130 - 10,150 | 1,2 - 1,1 - 1,2 | |||
| Elements (number) | 6 | |||
| Max. Elementlength (m) | 17,60 | |||
| Boomlength (m) | 10,00 | |||
| Turning Radius (m) | 10,12 | |||
| Feedlines (number) | 1 Coax 50 Ohm | |||
| Weight (kg) | 130 | |||
| Windload at 130 km/h | 1.995 N / 2,50 m² / 27,00 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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