OPTIBEAM ANTENNAS FROM GERMANY - ENGINEERING AT IT'S BEST
OB7-3 7 Element, 3 Band 20/15/10m
Full-size elements on each band. Unique low-VSWR direct feed system
Click here for photos of the excellent mechanical construction
| Bands* | 20 | 15 | 10 |
| Gain (dbd)** | 4.2 | 4.3 | 5.5 |
| Gain (dbi)*** | 11.5 | 12.0 | 13.1 |
| Elements | 2 | 2 | 3 |
| F/B (db) | 15 | 15 | 30 |
| VSWR (worst): | <1.5 | <1.6 | <1.5+ |
*External tuner also gives acceptable results on 17/12m
**=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
+ =28.0-29.0
Max. Element length (m) - 10.82
Boom length - 4.10
Turning Radius (m) -5.76
Feedlines (number) -1 Coax 50 Ohm
Weight (kg) -19
Windload at 130km/h - 654 N / 0,82m²
Price = .Please check with us for current prices.