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The
nominal
output
impedance
of
the
LK500ZB
is
50
Ohms
and the
SWR
of this
load should never
exceed
2zl.
Although
there
are
many
types
of
antennas whieh
wil I
meet
these requirements,
the
simplest is
a
one-halt (ll2)
wave
dipole
eenter fed
with
52
Ohm
coax. For a detailed diseussion on
antennasr w€
suggest
referring to
an appropriate
antenna
book.
Most
practical
antennas
exhibit
an
SWR
range
over
a
complete
amateur band
that
exeeeds
2zL. For this
teason we
reeommend
using
an antenna matching network whieh
will allow
the
LKS00ZB
to
work
into
a
50
Ohm
resistive
load
for
maximum
power
transfer
into
the
antenna. The
new
AT-3000
by
Amp
Supply
Co. is a
perfect
companion
tuner
for
the "LK-500
series
of
ampl
ifiers.
CAUT I
ON
NEVER ATTEMPT
TO
OPERATE
THE LKs()()ZB
WITHOUT
FIRST
CONNECTING
IT
TO AN ANTENNA OR 5()
OHM DUMMY LOAD
OF SUFFICIENT
POWER
HANDLING
CAPACITY OR SERIOUS
DAMAGE MAY RESULT.
Gra.und--Seguirsmsnts. The
LKs00ZB
should be attached
to a
good
earth
ground through
as
short
and
as large a
ground
strap
as
poss
ibI
e
for
best resul
ts.
A
ground
post
is
prov ided on
the rear
of
the
LKs00ZB
ehassis
for this purpose. It is
always
a
good
idea
to
eonneet
the chassis
of
al
I
assoeiated equipment together
and ground them
at
one
point to
avoid
ground
loops.
We
recornrnend
that all of
the
equipment
in
your
station
be
eonneeted together
and grounded
at
the
Antenna Tuner.
TUNING
PROCBDUBB
WAR}IING
THIS TINIT
IS
SHIPPED BEADY FOR
294
VAC
OPERATION.
IF
YOI,'R
APPLICATION REQUIRES
RUNNING
THE LK500ZB
ON
LL? VAC,
SEE
nPOI{ER
REQUIREMENTSN T]NDER
INSTALIÄTION
INSTRUCTIONS.
l.
Set
the
Bandswiteh
to
the desired
band.
2.
Set the
Load
Control
on
number shown
on
tuning chart.
3.
Set the
Tune
Control
on
numbet shown
on
tuning chatt.
4.
Set the
On/Ac
Control to
ON.
5'
Set the xmit/Stuy Control
to
J(MIT.
6.
Set Meter switch
to grid current. (tnis is
read on
Plete/Grid
Current
Meter
)
.
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