Kenwood TM-431E User Manual
Page 8
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2.
Before
connecting
and
disconnecting
the
power
connec
tor be sure to turn OFF the POWER switch on the front
panel of the transceiver and the power supply.
3.
Observe
proper
polarities
when
connecting
the
DC
power
cable to the supply.
Remember red is positive and black is negative.
3-2-3. Antenna
The type of antenna that is used will greatly affect the per
formance
of
the
transceiver.
Use
a
properly
adjusted
anten
na,
of
good
quality,
to
enable
your
transceiver
to
perform
at
its
best.
The
antenna
input
impedance
is
50
ohms.
Use
50 ohm coaxial cable such as RG-8U or 8D-2V for this con
nection.
If
the
antenna
is
far
from
the
transceiver
the
use
of
low
loss
cable
is
recommended.
Match
the
impedance
of the coaxial cable and that of the antenna so that the SWR
will be less than 1.5 to 1. The protection circuit in the tran
sceiver
will
activate
if
the
SWR
is
particularly
poor
(greater
than
3
to
1).
High
SWR
values
will
cause
the
transmitter
output to fall off and may lead to TVI or BCI reports.
CAUTION:------------------------------------------------------------------
We
recommend
that
you
install
a
high
quality
lightening
ar
restor
in
your
antenna
lines
for
protection
against
fire,
elec
tric shock, personal injury, or damage to the radio itself.