Installation And Connections; Unpacking; Selecting A Location; Grounding - Icom IC-78 Instruction Manual

3

INSTALLATION AND CONNECTIONS

n Unpacking
After unpacking, immediately report any damage to
the delivering carrier or dealer. Keep the shipping car-
tons.
For a description and a diagram of accessory equip-
ment included with the IC-78, see 'Supplied accesso-
ries' on p. 1 of this manual.
n Selecting a location
Select a location for the transceiver that allows ade-
quate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna ele-
ments, radios and other electro-magnetic sources.
The base of the transceiver has an adjustable stand
for desktop use. Set the stand to one of two angles de-
pending on your operating conditions.
n 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
terminal to a gas or electric pipe, since the connec-
tion could cause an explosion or electric shock.
8
n Antenna connection
For radio communications, the antenna is of critical im-
portance, along with output power and sensitivity. Select
antenna(s), such as a well-matched 50 Ω antenna, and feed
line. 1.5:1 or better of Voltage Standing Wave Ratio (VSWR)
is recommended for your desired band. Of course, the trans-
mission line should be a coaxial cable.
PL-259 CONNECTOR INSTALLATION EXAMPLE
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 approx. 2.0:1, the
transceiver's power drops to protect the final transis-
tor. In this case, an antenna tuner is useful to match
the transceiver and antenna. Low SWR allows full
power for transmitting even when using the antenna
tuner. The IC-78 has an SWR meter to monitor the
antenna SWR continuously.
connect the [GND]
CAUTION:
Protect your transceiver from light-
ning by using a lightning arrestor.
30 mm
Coupling ring 10 mm (soft solder)
10 mm
Soft
solder
1–2 mm
solder solder
30 mm ≈ in 10 mm ≈
9 ⁄
8
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Strip the cable as
shown at left. Soft
solder the center con-
ductor.
Slide the connector
body on and solder it.
Screw the coupling
ring onto the connec-
tor body.
in 1–2 mm ≈
3 ⁄ 1 ⁄ in
8 16