Heathkit HW-9 User Manual

Page 83
Heathkit
NOTE:
If you
do
not
have the
accessory
bands
in-
(
)
Reinsert the
bandswitch
shaft into
the switch
stalled,
omit the
next
two
steps.
(
)
Turn the
BAND
switch
to
12 and
adjust
L414
and L415
for
a
maximum
indication
on
your
meter.
(
)
Turn the
BAND
switch
to 10
and
adjust
L416
and
L417
for a
maximum
indication.
(
)
Turn
the
BAND
switch to
80.
In the
following
steps,
you
will
readjust
coils L401
through L417,
in
pairs,
with
the
dial
alternately
set
at
250 and
zero.
For
each step,
select the
band
and
set
the
dial at
250.
Then
key
the
transmitter
and
adjust the
indicated
coil.
Change the
dial to
zero,
key
the
transmitter,
and adjust
the
second
coil
of
the
pair.
Repeat
the step
until your
meter
readings
are as
high as
possible and
the
two
readings are
near-
ly
equal before
you
perform
the
next step.
If the
two
readings are
not
close
when
you
finish
adjusting
them,
adjust
the
coil at
the end
of the
band
that
pro-
duced
the
higher
reading
for
a
slightly
lower
reading
(at its
end of
the
band).
Then
readjust
the
other coil
at tie
end
of the
band that
produced
the
lower read-
ing.
When the
readings
at
both ends
of the
band
are
nearly
equal,
proceed
to the
next step.
Omit the
steps
that
have
an
asterisk if you
do
not
have the
accessory
bands
installed.
wafers,
with
the
collar on
the shaft
as
shown.
Press
the
collar
against
the
wafer and
tighten
the setscrew.
(
)
Turn the
Transceiver
on.
12
(
)
L415
(
)
L414
( )
Repeat
10
(
)
L417
(
)
L416
( )
Repeat
(
)
Disconnect
the test
leads
from the
Transceiver.
This
completes
the
bandpass
alignment.
Proceed
to
"BFO
Filter
adjustment."
BFO
FILTER ADJUSTMENT
(
)
Set the
BAND
switch to
80
and the CW
LEVEL
control
to the
center
of its
rotation.
( )
Key
the
transmitter
and
adjust
the CW
LEVEL
control
until you
obtain a
meter
reading.
Then
adjust L137
(on
the
oscillator
circuit
board)
until the
front
panel
meter
indicates as
high
as
possible.
Then
adjust the
coil in
the
oppo-
site
direction
until the
needle
just
starts to
move
down
scale. Unkev
the
transmitter.
(
)
Turn the
Transceiver
off.
BAND
DIAL
250
DIAL
0
80
)
L402
)
L401
)
Repeat
40
)
L404
(
)
L403
)
Repeat
30*
)
L406
)
L405
( )
Repeat
20
(
)
L408
(
)
L407
( )
Repeat
17*
)
L411
)
L409
(
)
Repeat
(
)
Turn
the
BAND
switch to
15 and
slide the
band
switch
shaft out
through the
front
panel
to
expose
coils L413
and
L412.
15
(
)
L413
(
)
L412
( )
Repeat
HFO
LEVEL
ADJUSTMENT
(
)
Tune
in a
clear
signal on
any
band and
set
GAIN
level.
(
)
Turn
control R173
(on the
oscillator
circuit
board)
counterclockwise
until
the
received
signal
disappears.
Now
turn the
control clock-
wise
until the
signal
reappears.
Continue turn-
ing the
control
clockwise
to a
point where
there is
no
further
increase,
and 1/8
turn
beyond.
NOTE: Do
not
turn this
control any
further
clockwise
than
the 3
o'clock
position
(as
viewed
from the
front
of the
control).
This
completes the
Alignment of
your
Transceiver.
Proceed to
"Final
Assembly."
(
)
Turn
the
Transceiver
off.

Heathkit HW-9 Specifications

General

Brand	Heathkit
Model	HW-9
Category	Transceiver
Language	English