Heathkit HW-9 User Manual

Page
78
Heathkit
HFO
ALIGNMENT
During the
alignment,
you will
use
the two
test wires
that
you prepared
earlier.
Refer
to Pictorial
5-3
(Illustration
Booklet,
Page
35)
for the
following
steps.
(
)
Push
the
PCB connector
on
one
end of
the
meter test
lead
(with an
alligator
clip
on the
other
end)
onto the circuit
board
pin
at METER
on
the oscillator
board.
(
)
Connect
the alligator
clip
of this
test
wire
to
the
positive
(
+
)
lead
of your
VTVM
(or DVM).
Then
connect
the
negative
or
common
lead
of
your meter
to the
Transceiver
chassis.
(
)
Set your meter
to measure
4-volts
DC
and
turn
the meter
on.
(
)
Push
the PCB
connector
on
one end
of the
test
lead
(assembled
earlier)
onto
the
pin at
RF.
When
a
test
point is
called
out
in
a step,
insert
the
bare end
of
the
test lead
wire
into
the
wire
socket
at that
test point
on
the circuit
board.
(
)
Connect
the
Transceiver
to a
12.6-volt
DC
source.
Then
turn the
AF
GAIN
control
on
the
Transceiver
clockwise
until
it
clicks
on.
( )
Connect
the
free
end of
the
test
lead
wire
to
TP103
(near
HFO
Level
control
R173).
NOTES:
1.
When
you
adjust
the
coils in
the
following
steps,
be
careful
not
to
exert
any
downward
pressure
on the
slugs.
Also
do not
turn
the
slugs
more
than
two
turns
clockwise.
Too
much
pressure,
or
turning
the
slug
too
far
clockwise,
could
dislodge
the slug
from
the
coil.
2. Adjustments
must
be
made in
the following
sequence for
proper
alignment.
Use
the small
end
of the
red alignment
tool to adjust
each
coil, in order,
for
a maximum
reading
on
your
meter
(you may
not
have a reading
when
you
start). Set
the BAND
switch
to the
band indi-
cated
for each
adjustment.
Some adjustments
may
seem very
sharp;
make
them slowly
and
carefully.
No coil
should
require
more
than
1-1/2
turns in
either
direction.
Increase
the
range
of your
voltmeter
as necessary.
If
you
do not
have the
optional
bands installed,
omit
the
steps
that have
an asterisk.
BAND
ADJUST
)
80
L124
)
40
L125
)
30*
L126
)
20
L127
)
17*
L128
)
15
L129
)
12*
L131
)
10*
L132
( )
Repeat
the preceding
steps
until
no
further
in-
crease
is
indicated
on
your meter.
Then
dis-
connect
the
RF wire
and
your meter,
and
re-
turn
the BAND
switch
to
the
80 Meter
posi-
tion.

Heathkit HW-9 Specifications

General

Brand	Heathkit
Model	HW-9
Category	Transceiver
Language	English