I Ground Connection - Icom IC-M801E Instruction Manual

I Ground connection

The transceiver and antenna tuner MUST have an
adequate RF ground connection. Otherwise, the over-
all efficiency of the transceiver and antenna tuner in-
stallation will be reduced. Electrolysis, electrical
shocks and interference from other equipment could
also occur.
For best results, use 50 or 75 mm (2 or 3 inches) wide
copper strap and make the connection as short as
possible. Ground the transceiver and antenna tuner
to one ground point, otherwise the voltage difference
(in RF level) between 2 ground points may cause
electrolysis.
R WARNING— When grounding to a metal hull
Use Zinc anodes to protect the hull from electroly-
sis.
Ask your technical dealer, installer or refer to a
technical book, etc., for RF grounding details.
CAUTION: NEVER connect the transceiver to a
"positive-grounded ship," otherwise the transceiver
will not function.
Ground system example
Copper pipe Metal object
CONNECTION AND INSTALLATION
Best ground points
• External ground plate
• Copper screen
• Copper foil
Acceptable ground point
• Stainless steel stanchion
• Through mast
• Through hull
• Metal water tank
Undesirable ground points
• Engine block
• Ship's DC battery ground
Un-usable ground points
(these connections may cause an explosion or electrical
shock)
• Gas or electrical pipe
• Fuel tank or oil-catch pan
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Copper screen
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