UHF CB radio marine deck mount antenna, 477MHz, 50W, UHF male PL259, 8.1dBi – 2.1m

UHF CB radio high gain marine deck mount antenna, 477 MHz, 50W, UHF male PL259, 4.5m RG58A/U, 8.1 dBi - 2.1m

Product code: ZM21-477

The ZM21-477 high gain marine UHF CB Radio antenna is suitable for 477 MHz UHF communications while at sea, suitable for commercial or leisure vessels.The ZM21-477 UHF CB high gain antenna comes standard terminated with 4.5 metres of white RG58 coaxial cable and a UHF male PL259 supplied, not fitted for ease of routing your cable. The ZM21-477 is rated for a maximum input power of 50 Watts and gain performance of 8.1 dBi gain. The ZM21-477 high gain 477MHz marine antenna requires either a MM1 white nylon fold down base, MM2 stainless steel fold down base or ant 1-1/4" UNS male threaded base. Alternatively you can mount the ZM21-477 to a tower or pole utilising a MMA series mast mount adaptor and appropriate clamps such as 2 x EB1-SS parallel mount clamps. ZCG recommend waterproofing all termination with a layer of amalgamation butyl rubber tape and top layer of uPVC tape to greatly reduce possible water/dust/debris ingression.



477 MHz - UHF CB Radio


476.4125-477.4125 MHz - all 40/80 channels


8.1 dBi

Maximum Power

50 Watts


50 Ohms

HE Plane

H Plane: 360° omni-directional


Vertical - do not not lean/tilt


White tapered fibreglass radome, chrome ferrule and 4.5m RG58A/U cable


UHF male PL259 connector supplied, not fitted


Factory at 1.5:1 VSWR


Height: 2.2m, Cable length: 4.5 metres, Mount thread: 1-1/4"



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