Specifications

Power
Supply
PK.96
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If
you
have
an
idea
which subsystem might be the culprit, try substituting it
with
one
you
know is
good.
Il'
your
system works
okay after
the
substitution
is
in
place, you've
found the culprit.
The Power
Supply
The PK-96 needs to be f'ed by a regulated
power
supply
that
can
provide
at least 12 VDC @
400mA
under
Load. Many
amateurs connect all their station equipment to a single
power
supply
and expect it to
provide
enough
'Juice"
to make their tranceiver(s) operate at
full
power,
operate
its
accessories,
and the PK-96.
You
may have
purchased
a
"power
cube"
that's dedicated to
your
PK-96
and
no other device. However,
with
both arrangements, if the
power
supply is insufficient
to
supply
all the
electrical needs of the device(s)
con-
nected to it, something has to
suffer-which brings us to the PK-96.
You can find
out if the PK-96 is
getting
enough
juice
by removing its chassis cover and measuring
the
voltage
and current-while everything connected
to
its
power
supply
is
up
and running at maximum
cur-
rent consumption-across
and through its fuse fbund by
the
righrhand rear corner of the circuit
board.
Measure the voltage from one
end of the fuse to the chassis
(or
another
grounding point).
For the clrffent
reading,
turn the PK-96 ofi lift one
end of the
fuse,
connect
your
meter's
probes
in series
between
the
fuse
holder and lifted fuse
end, then turn the unit
back
on. If the PK-96 is receiving less than adequate
power
and operating
peculiarly, you'll
need to
connect a
"beefier" power
supply to
power
it.
The
Power
Supply Cable
This is the second item
you
should check if
your
PK-96 doesn't
power
up; it's also the easiest subsystem
component
to troubleshoot. If
you
used
the
power
cable that
accompanied
the PK-96 in its shipping car-
ton,
remember
that the
white
stripe that runs alongside one edge of the
wires is
the
positive
(+)
lead that
goes
from the
(+)
terminal on
your power
supply to the center
conductor
of the connector that
plugs
into
the
PK-96;
the other
conductor, of course,
goes
to
the
(-)
of the
power
supply
and
"sleeve" (outer
ring) of
the PK-96's
power
connector.
If
you
have these
connected
inconectly
or
the supplied cable is
polarized
in-
correctly, the PK-96
won't work at all.