| 4 big monobanders on 1 boom, no traps !!! |
|
OptiBeam
| OB17-4 | 17 Element, 4 Band | |
| Bands | 40 / 20 / 15 / 10 | |
| Gain (dBd) * | 4,8 / 7,3 / 7,8 / 8,0 | |
| Gain (dBi) ** | 11,7 / 14,9 / 15,5 / 15,8 | |
| F/B (dB) | 25 / 20 / 22 / 24 | |
| VSWR | ||
| 40 m allgemeines setting: | ||
| 7,00 – 7,05 – 7,15 | 1,7 – 1,1 – 1,9 | |
| 40 m USA phone setting: | ||
| 7,15 – 7,20 – 7,30 | 1,7 – 1,1 – 1,8 | |
| 14,00 – 14,18 – 14,35 | 1,4 – 1,1 – 1,3 | |
| 21,00 – 21,27 – 21,45 | 1,5 – 1,1 – 1,5 | |
| 28,00 – 28,59 – 29,00 | 1,5 – 1,1 – 1,4 | |
| Elements (number) | 17 | |
| Active Elements | 3 / 4 / 4 / 6 | |
| Max. Elementlength (m) | 14.6 | |
| Boomlength (m) | 11.9 | |
| Turning Radius (m) | 9.15 | |
| Feedlines (number) | 1 Coax 50 Ohm | |
| Weight (kg) | 100 | |
| Windload at 130 km/h | 1.989 N / 2,48 m² / 26,8 feet² | |
| Price *** | 3.869,00 EUR |
| * = 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) | |
| *** = outside EU minus 19% tax – subject to change | |
The lead developer of the bar code system that became the now-ubiquitous Universal Product Code (UPC), George Laurer, K4HZE, of Wendell, North Carolin... Read more
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Recent Posts
Bar Code Lead Developer George Laurer, K4HZE, SK
Recent 3000km+ opening on 144 MHz between New Zealand and Australia reported
IC-9700 – Firmware Update
RADIODDITY GA-510 | 10W | DUAL BAND | TRI-POWER | ANALOG RADIO | 2 BATTERIES
ARRL 10-Meter Contest
NOAA/NASA Panel Concurs that Solar Cycle 25 will Peak in July 2025
SAQ, Sweden’s Alexanderson Alternator, Announces Scheduled Christmas Eve Transmission
