COOL
ING
The
transceiver
should
be
placed
in
the
operating
area
to
insure
the
RF
Amplifier
heatsink at
the
rear
of the transceiver
is not
blocked.
Adequate
ventilation nust
be
maintained
in this area
to
insure
that the
transistors
in the linear
amplifiers
are
not
damaged.
Cool
operation
of
these
transistors
will
insure
greater
life
expectancy.
ANTENNA
The transceiver
is designed to operate into a
noninal 50 ohm
resistive
1oad,
but it is
protected
against accidental opens or
shorts
in the antenna
or high ShrR. Operation into most loads
within
2:1
SWR will
be
quite
satisfactory. It
should
be noted
that
nobile
antennas,
particularly
on the low frequency
barrds,
often
present
mismatches
greater
than 2:L.
0peration
into
loads
with SWRfs greater
than 2:L may be
practical
or useful under
certain
circumstances
and
in energencies, but is not recommended
for
regular
usage.
GeneraLIy the
higher
the SWR,
the'lower
the
power
output
capability
of
the
transmitter.
In
some cases the
quality
of the
transmitted signal
may also suffer as SWR is
o"1
increased
above 2:L. It is
recommended
that due consideration
be
given
to antenna matching for sinplest trouble
free
operation.
For
further
discussion on
the effects
of high SWR, see
the
section
on
OPERATI0N
under
"meterrt.
It
is reconmended
that
the
antenna
ground
when
the transceiver is not
lightning.
Matching
the transceiverrs load impedance is also very import
when
an outboard
linear anplifier
is
used. Be sure to
check the
SWR
between
the transceiverrs output and the input to the
linear
anplifer.
Keep it
under
2:L and as
close
to 1:1 as
possible
for
best
operation.
EXTERNAL
VFO
be
disconnected
or
switched to
in
use as
a
precaution
against
The
Model SS-208 External
VFO
connector
on the rear
panel.
procedures
are required.
connected to the
ACCESSORY
other
installation
steps
or
1S
No
-8-
To Next Page
Loading...
Need help?
General