The ZM21-27 omnidirectional marine 27MHz deck mount antenna, is suitable for 27MHz communications whilst at sea. The ZM21-27 marine 27MHz antenna is tuned for maximum performance for the Distress, Urgency and Safety Calling 27.86 MHz and 27.88 MHz frequency allocations. The ZM21-27 marine HF antenna requires either a MM1 white nylon fold down base, MM2 stainless steel fold down base or alternatively you can mast mount the ZM21-27 HF marine antenna utilising a MMA mast mount adaptor with 2 x EB1-SS parallel mount clamps. ZCG recommend waterproofing your terminations utilising two layers of amalgamation butyl rubber and a single external layer of uPVC tape to ensure no water ingression into your connector joints. The ZM21-27 27MHz marine antenna should be orientated in a vertical polarisation whilst in use and completely laid flat whilst the vessel is being transported on a trailer to avoid contact with overhead infrastructure.
FREQUENCY
27.86-27.98 MHz - Maritime HF 27 MHz communications
BANDWIDTH
Favoured for 27.68 MHz + 27.88 MHz - Maritime Distress, Urge
GAIN
2.1 dBi
MAXIMUM POWER
25 Watts
IMPEDANCE
50 Ohms
HE PLANE
H Plane: 360° omni-directional
POLARISATION
Vertical - not leaned
CONSTRUCTION
White fibreglass radome, chrome mount ferrule and 4.5m white RG58
CONNECTOR
UHF male PL259 connector supplied, not fitted
TUNING
Factory at 1.5:1 VSWR at 27.86 MHz + 27.88 MHz
DIMENSIONS
Height: 2.1m, Mount thread: 1-1/4" UNS female
WEIGHT
1.0kg