| Model | F11 (VHF) | AS-390/SRC (UHF) |
|---|---|---|
| Frequency Range | 100-174 MHz | 225-400 MHz |
| Gain | Unity | Unity |
| VSWR (Nom.) | Under 2:1 for 100-174 MHz Under 1.5:1 for 150-160 MHz |
Under 2:1 |
| Horizontal Pattern | Omni Directional within 0.5 dB | Omni Directional within 0.5 dB |
| Vertical Pattern | 95° ± 15° (depending on frequency) | 95° ± 15° (depending on frequency) |
| Impedance | 50 ohms | 50 ohms |
| Power Rating | 400 Watts at 170 MHz 500 Watts at 132 MHz |
200 Watts at 400 MHz |
| Connector | N Female | N Female |
| Model | F11 (VHF) | AS-390/SRC (UHF) |
|---|---|---|
| Overall Height | 40 inches | 16 inches |
| Stub Height | 22 – 3/8 inches | 9.625 inches |
| Skirt Diameter | 43 inches | 23 inches |
| Weight | 6 lbs. 3.5 oz. | 3.75 lbs |
The F11 and AS-390/SRC are vertically polarized broadband coaxial stub antennas designed for the VHF and UHF communications band. Both have been designed to withstand the most severe weather conditions. Protection from lightning is provided by grounding the top section of the stub through the stainless steel tie rod to the antenna ground plane.
