Icom IC-7800

2-3
■ Grounding
To prevent electrical shock, television interference
(TVI),broadcastinterference(BCI)andotherprob-
lems, ground the transceiver through the GROUND
terminal on the rear panel.
For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance
between the [GND] terminal and ground as short as
possible.
R WARNING! NEVER connect the [GND]
terminal to a gas or electric pipe, since the connection
could cause an explosion or electric shock.
■ Antenna connection
For radio communications, the antenna is of critical im-
portance, along with output power and receiver sensi-
tivity. Select antenna(s), such as a well-matched 50 Ω
antenna, and feedline. We recommend 1.5:1 or better
ofVoltageStandingWaveRatio(VSWR)foryourde-
sired band. Of course, the transmission line should be
a coaxial cable.
When using 1 antenna, use the [ANT1] connector.
CAUTION: Protect your transceiver from light-
ning by using a lightning arrestor.
■ CF (Compact Flash) memory card
Read/write indicator
Insert the supplied CF (Compact Flash) memory
card into the CF memory card slot.
 •ToremovetheCFmemorycard,push-inthebutton,lo-
cated at left hand side of the slot.
Make sure to install the memory card correctly.
NEVER insert or remove the CF memory card
when the read/write indicator lights or blinks.
2
INSTALLATION AND CONNECTIONS
PL-259 CONNECTOR INSTALLATION EXAMPLE
30 mm ≈
9
⁄8 in 10 mm ≈
3
⁄8 in 1–2 mm ≈
1
⁄16 in
30 mm
10 mm (soft solder)
10 mm
1–2 mm
solder solder
Soft
solder
Coupling ring
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Slide the connector
body on and solder it.
Screw the coupling
ring onto the connec-
tor body.
Strip the cable as
shown at left. Soft
solder the center
conductor.
q
w
e
r
Antenna SWR
Each antenna is tuned for a specified frequency range
and SWR may be increased out-of-range. When the
SWR is higher than approximately 2.0:1, the trans-
ceiver’s power drops to protect the final transistors.
In this case, an antenna tuner is useful to match the
transceiver and antenna. Low SWR allows full power
for transmitting. The IC-7800 has an SWR meter to
monitor the antenna SWR continuously.