Appendix C: Grounding and RF protection
TT-98-129218-A
Alternative grounding for timber hulls
64
Alternative grounding for timber hulls
Grounding the terminal
The terminal must be grounded with the short antenna cable and the Grounding kit (accessories).
Further, the terminal must be grounded at its grounding stud in order to ensure a proper
grounding if the short antenna cable is disconnected.
The ground connection must be established at a dedicated RF ground (either capacitive or
electrical coupled). Bear in mind that the antenna ground connection is to be made at the
same
electrical ground potential
as the terminal (see
Grounding the antenna
).
Grounding the antenna
If the mounting base of the antenna is electrically connected to any other ground potential than
the terminal (e.g. Lightning Ground), the antenna must be isolated at its mounting bolts by means
of shoulder bushes and washers - see page 67.
However, a ground connection must be established via one of the mounting bolts using a separate
ground cable. The ground cable must be routed parallel and in close proximity to the shielded
coax cable hence connecting the antenna to the terminal Grounding kit. A tinned heavy gauge
wire (min. 6 mm
2
) can be used for this purpose - see page 64.
Alternative grounding for timber hulls
Antenna
Terminal
RF Ground
Heavy Gauge Wire
Terminal Grounding Kit
-
+
