Heathkit HW-9 User Manual

Page
80
Heathkit
MIXER
FILTER
ALIGNMENT
(
)
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
lead
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
1 .
5
volts
DC.
(
)
Push
the
PCB
connector
of
the
test
lead
onto
the
pin at
RF
and
insert the
bare
end of
the
RF
wire into
the
wire
socket at
TP101.
To
align
the
mixer
filters
(L101
through
L117),
you
will
first
adjust
two
coils
for
the 80
Meter
band; L101
with
the
dial
set
at
zero
and L102
with
the
dial
set
at
250.
Then
you
will
repeat the
two
adjustments
until
the
VTVM
or
DVM
reading
shows
no
further
improvement
before
you
proceed to
adjust
the
next
band.
NOTE:
The
two
readings
on
each
band
may
or may
not be
the
same.
Coils
L101
through
L106
will
peak
when
the
slugs
are
approximately
1/16"
down
from
the
top
of
the
coil
form.
Coils L107
through
L117
will
peak
with
their
slugs
approximately
1/8"
down.
Preset
these
slugs
in the
following
manner
before
you
begin
the
filter
alignment.
(
)
Insert the
alignment
tool
into the
slug of
the
coil and
turn
the slug
counterclockwise
until
it is
even
with the top
of
the coil
form.
Then
turn the
slug
clockwise
two
complete
turns for
1/16"
(L101
through
L106),
or
four turns
for
1/8"
(L107
through L117).
NOTE:
If you
do not
have the
optional
bands in-
stalled,
omit the
steps
that are
marked
with an
as-
terisk.
BAND
DIAL
0
DIAL
250
80
)
L101
(
)
L102
( )
Repeat
40
)
L103
(
)
L104
( )
Repeat
30*
)
L105
(
)
L106
( )
Repeat
20
)
L107
(
)
L108
( )
Repeat
17*
(
)
LI 09
(
)
Llll
( )
Repeat
15
(
)
L112
(
)
L113
( )
Repeat
12*
(
)
L114
(
)
L115
(
)
Repeat
10*
)
L116
(
)
L117
(
)
Repeat
This
completes
the
alignment of
the
circuits
on the
oscillator
circuit
board.
Disconnect
the
test
leads.
Then
proceed
with
"T/R
Board
Adjustments."

Heathkit HW-9 Specifications

General

Brand	Heathkit
Model	HW-9
Category	Transceiver
Language	English