Description
This is a ruggedized base antenna, designed for use in even the most extreme climatic conditions. The radome which houses the active elements of the COL18 was originally designed to serve as the mast of recreational sail boards and is immensely strong. The radome is colored black to maximize solar heat retention and this has been shown to aid significantly in ice shedding. A substantial alodine aluminum mounting tube supports the radome.
Specifications:
| Frequency Range | 144 – 175 |
| Base Gain | 4 to 7 dBd |
| Power w | 200 |
| Polarisation | Vertical |
| VSWR | <1.5:1 |
| Termination | N female bulkhead |
| Mounting area | 750mm x 60mm diam. alodined aluminum |
| Construction | Alodined aluminum elements with ruggedized black fiberglass radome |
| Tuned bandwidth | 4.00% |
| Passive IM 3rd Order (2x20W) dBc | <-125 |
| Horizontal Beamwidth | Omni +/- 0.5dB |
| Frequency MHz | 144 – 175 |
| Length [mm] | 4700 |
| Brand | RFI |
| Weight [kg] | 6 |
Tim Alexander Dollery –
Maximum and Reliable Performance