To install the antenna:
(1)
Abrade the underside of the antenna hole with coarse emery cloth to remove
paint and produce a clean, bright bare metal surface. This will provide a good
contact for the antenna ground. Smear the surface lightly with silicone grease
prior to tightening the antenna mount to prevent corrosion.
(2)
Route, but do not connect, the antenna feeder cable to the radio.
(3)
Check for low resistance (<0.1
W
) between the centre pin of the coaxial
connector and the antenna radiator.
(4)
Check for high resistance between the centre pin of the coaxial connector
and the vehicle chassis.
(5)
Check for low resistance between the body of the connector and the vehicle
chassis.
(6)
Connect the antenna feeder cable to the transceiver.
Fitting the Antenna to Fibreglass Vehicles
A separate ground plane must be installed for fibreglass vehicles. This can take the
form of a aluminum metal plate or close mesh. The ground plane must extend to at least
a quarter of a wavelength in every direction. Alternatively two ‘crossed’ aluminum strips
can be used. Again the distance from the antenna mounting point to the end of each
strip must be at least a quarter of a wavelength.
T6M User Guide
Page 20
Antenna Radiation Patterns:
Centre Roof Mounting
Quarter (Wing) Mounting