VHF Collinear 144-175MHz Custom Tuned - 3 dBd

COL3

The 144-175 MHz COL range is a series of "cut to frequency" 3dBd gain vertical collinears. The range includes antennas suitable for simplex, duplex and rugged applications. All of the antennas include internal DC grounding for lightning protection and the reduction of static noise. Drainage vents at the base allow the antennas to 'breathe' and thus prevent condensation build up. The alodine finish of the aluminium mounting tube provides a conductive surface which ensures effective earthing when mounted.

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The COL3 is electrically identical to the COL17 antenna. The COL3 is a ruggedised antenna, designed for use in the most extreme climatic conditions. The radome which houses the active elements of the COL3 was originally designed to serve as the mast of recreational sail boards and is immensely strong. The radome is coloured black to maximise solar heat retention and this has been shown to aid significantly in ice shedding. A large alodined aluminium mounting tube supports the radome.

Nominal Gain dBd	3
Frequency MHz	144 to 175MHz Custom Tuned
Tunable Bandwidth	4.0%
VSWR	<1.5:1
Polarisation	Vertical
Vertical Beamwidth	38°
Horizontal Beamwidth	Omni +/- 0.5dB
Power W	200
Construction	Alodined aluminium elements with ruggedised black fibreglass radome
Length mm	3000
Weight (kg)	4.2
Termination	N female bulkhead. For COL17 see note (1)
Mounting Area	500mm x 60mm diam. alodined aluminium