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■ Grounding
To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other prob-
lems, ground the linear amplifier 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 be-
tween the GROUND terminal and ground as short as
possible.
R WARNING: NEVER connect the
GROUND terminal to a gas or electric pipe, since
the connection could cause an explosion or electric
shock.
■ Antenna
For radio communications, the antenna is of critical im-
portance, along with output power and sensitivity. Se-
lect antenna(s), such as a well-matched 50 Ω antenna
with more than 2 kW power rating, and feedline. 1.5:1
of Voltage Standing Wave Ratio (VSWR) is recom-
mended for a desired band. Of course, the transmis-
sion line should be a coaxial cable.
When using 1 antenna, use the [ANT1] connector.
CAUTION: Protect your linear amplifier from light-
ning by using a lightning arrestor.
6
2
INSTALLATION AND CONNECTIONS
PL-259 CONNECTOR INSTALLATION
30 mm ≈
9
⁄8 in 10 mm ≈
3
⁄8 in 1–2 mm ≈
1
⁄16 in
q Slide the coupling ring down. Strip the cable jacket
and soft solder.
w Strip the cable as shown at left. Soft solder the
center conductor.
e Slide the connector body on and solder it.
r Screw the coupling ring onto the connector body.
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 lin-
ear amplifier’s power drops to protect the final FET.
In this case, an antenna tuner is useful to match the
linear amplifier and antenna. Low SWR allows full
power for transmitting even when using the antenna
tuner. The IC-PW1 has an SWR meter to monitor the
antenna SWR continuously.
30 mm
10 mm (soft solder)
10 mm
1–2 mm
SolderSolder
Soft
solder
Coupling ring